Appendix
The Appendix is intended for use in conjunction with the 2021 Annual Air Quality in Ontario Report. The Appendix briefly describes the provincial Air Quality Health Index (AQHI) network, quality assurance and quality control procedures, and the Ministry of the Environment, Conservation and Parks’ air quality database. It also includes a series of tables displaying station locations and a listing of the summary statistics including means, maximums, percentile values and the number of exceedances of the Ontario Ambient Air Quality Criteria (AAQC) for each pollutant. In addition, trends for select common pollutants are displayed for a 10-year period, whereas trends for select research parameters are displayed for a 6-year period.
Monitoring network operations
Network description
In 2021, the ministry operated 39 ambient air monitoring sites across Ontario as part of the AQHI network. The AQHI network was comprised of 134 continuous monitoring instruments at 39 sites. These instruments have the capability of recording minute data (approximately 70 million data points per year) that are used to scan and validate the continuous hourly data.
Quality assurance and quality control
Day-to-day maintenance and support of the instruments are administered by ministry staff. Instrumentation precision is verified by daily automatic internal zero and span checks. Data analysts and station operators review span control charts to confirm instrument precision using a telemetry system. A quarterly quality assurance and quality control (QA/QC) review is performed on the ambient data set to highlight anomalies and administer corrective action in a timely manner.
The air monitoring station operators routinely inspect and maintain monitoring equipment and stations with mandatory quarterly on-site visits where secondary transfer standards are used to calibrate instrumentation. Station maintenance activities are recorded using Fieldworker Inc. software, an electronic documentation solution; this information is transferred directly to the ministry’s database. The instrumentation used throughout the provincial air monitoring network has been standardized to Thermo Electron Corporation analyzers to streamline parts inventory and leverage common hardware used within each analyzer. The following is a summary of the instrumentation deployed within the network and are all US EPA designated equivalent methods:
- Nitrogen Oxides – TE42C/I
- Fine Particulate Matter – SHARP 5030
- Ozone – TE49C/I
- Sulphur Dioxide – TE43I
- Carbon Monoxide – TE48I
- Total Reduced Sulphur – TE43I/CDN101
The ministry operates a laboratory with gas reference standards that adhere to those of the U.S. National Institute of Standards and Technology (NIST) and the Air Quality Research Division of Environment and Climate Change Canada. The secondary transfer standards used by station operators are referenced and certified to the ministry’s NIST primary standards on a quarterly basis.
The TRAP instrumentation used throughout the roadside air monitoring network include:
- Ultrafine Particles – Teledyne API Model 651
- Black Carbon in PM2.5 – Magee Scientific AE33 Aethalometer
- Heavy Metals in PM2.5 – Cooper Environmental Xact 625
- Major Components in PM2.5 – Aerodyne Quadrupole Aerosol Chemical Speciation Monitor (ACSM)
The Ontario ambient air quality monitoring network undergoes constant maintenance to ensure a high standard of quality control. Continuous real-time data are consistently reviewed, assessed and validated by ministry staff. Immediate actions are taken to correct any inconsistencies that may affect the validity of the data. These measures ensure ambient air monitoring data are valid, complete, comparable, representative and accurate. As a result, the 2021 ambient air quality monitoring network had 98.6% valid data from over one million hourly data points.
Data base
The ambient air quality data used in this report are stored in the ministry’s air quality information system (AQUIS) and are made available through the Air Quality Ontario web site, and the Ontario Data Catalogue. A statistical pattern test is used to identify data anomalies, such as unusual pollutant concentrations. Each pollutant has a predetermined concentration range based on historical data. Values outside this range are flagged for further investigation.
Data are obtained from automated ambient air monitoring instruments that operate continuously to produce an average measurement for every hour for a possible total of 8,760 measurements in a given year. Hourly parameters measured include NO/NO2/NOx, PM2.5, O3, SO2, CO and TRS compounds. An annual mean requires at least 6,570 hourly readings. In addition, each quarter of the year should have 75% valid data for PM2.5, whereas for ozone, only the 2nd and 3rd quarters of the year require 75% valid data based on protocols that are consistent with the Canadian Council of Ministers of the Environment (CCME) and the United States Environmental Protection Agency (U.S. EPA). For VOC samples, half of the method detection limit (MDL) is applied as appropriate to concentrations measured below the detection limit. An annual and/or monthly mean for 24-hour VOC samples requires 50% of valid samples. The 50% data requirement also applies to the research parameters (ultrafine particles, black carbon and trace metals and major components of PM2.5).
Network descriptive table
The AQHI network for 2021 is summarized in the 2021 Ontario Continuous Ambient Air Monitoring Network. The table displays the station name, numerical identifier and pollutants measured. The numerical identifier is the station (ID) number, the first digit of which identifies the geographic region in which the station is located. Air monitoring stations within the AQHI network can measure up to six common pollutants (NO2, PM2.5, ozone, SO2, CO and TRS compounds) based on the pollutant(s) of concern for the regional area it represents.
The 2021 Ontario Continuous Ambient Air Monitoring Network also identifies the type of air monitoring site: ambient, roadside, Canadian Ambient Air Quality Standard (CAAQS), and/or National Air Pollution Surveillance (NAPS). Ambient sites represent the general air quality of an area without any direct influence of local industrial sources. Road-side sites are typically within approximately 100 m of a major roadway with daily traffic volumes greater than 10,000 vehicles per day.
Annual statistics and trends
The annual statistical data and trends for various continuous pollutants and selected volatile organic compounds are presented in the Appendix. The annual averages, maximums and percentiles are displayed in the annual statistics tables. (A percentile is the value equal to or below which a given percentage of the data set falls. For example, if 70% of the data are equal to or below 0.10 ppm, the 70th percentile is 0.10 ppm).
The trends are calculated from monthly means through the Mann-Kendall (M-K) test. The M-K test is a nonparametric statistical approach that can be applied to data without making assumptions on the nature of the data distribution. The M-K test is essentially a test for uniform progression (zero change) in the slope of the linear regression of time-ordered data versus time (Gilbert, 1987). The M-K test is particularly suitable for environmental monitoring data since missing, trace and below detection limit values can be handled. This test can also be used to compare trends at multiple stations. The seasonal Kendall test, also performed in this Report, is a generalization of the M-K test (Gilbert, 1987) for use to determine the true trend when there are seasonal cycles in the data which do not constitute a true long-term trend. The change over time was based on the Sen’s slope, also known as the Thiel-Sen’s estimator of linear trend. The Sen’s slope is closely related to and applied in conjunction with the M-K Test. Compared to the common least squares regression, the Sen’s slope procedure is a nonparametric method for computing the value of the true slope when there are gross errors or outliers in the data without making assumptions of a normal distribution on the data (Gilbert, 1987).
Other informative tables
Calculated CAAQS metrics for PM2.5, ozone, NO2 and SO2 are presented for 2021 (based on a three-year average, 2019-2021) and over a 10-year period in Canadian Ambient Air Quality Standard Reporting. The air zone management levels associated to each CAAQS reporting pollutant are also provided for reference. The percentage distribution of hourly AQHI readings within the various health risk categories for each of the 39 monitoring sites, and the number of air quality alerts issued in Ontario during 2021 are summarized in AQHI and Air Quality Alert Program Reporting.
2021 air monitoring network
ID | Station name | Station location | Year | Latitude | Longtiude | Air intake | Type | AQHI | NO2 | PM2.5 | O3 | SO2 | CO | TRS |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 1969 | 42°18'58.8" | -83°02'37.2" | 4 | A/RS/C/N | Y | T | T | T | T | T | N/A |
12016 | Windsor West | College Ave./South St. | 1975 | 42°17'34.4" | -83°04'23.3" | 4 | A/RS/N | Y | T | T | T | T | N/A | T |
13001 | Chatham | 435 Grand Ave. W. | 2005 | 42°24'13.3" | -82°12'29.9" | 15 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
14111 | Sarnia | 700 Christina St. N. | 2016 | 42°59'25.0" | -82°23'43.2" | 3 | A/C/N | Y | T | T | T | T | N/A | T |
15020 | Grand Bend | Point Blake Conservation Area | 1991 | 43°19'59.1" | -81°44'34.4" | 5 | A/N | Y | T | T | T | N/A | N/A | N/A |
15026 | London | 42 St. Julien St. | 2013 | 42°58'28.1" | -81°12'03.1" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
16015 | Port Stanley | 43665 Dexter Line, Elgin Water T. Plant | 2002 | 42°40'19.5" | -81°09'46.4" | 5 | A/N | Y | T | T | T | N/A | N/A | N/A |
18007 | Tiverton | 4th Concession/Bruce Rd. 23 | 1979 | 44°18'52.1" | -81°32'59.0" | 4 | A/N | Y | N/A | T | T | N/A | N/A | N/A |
21005 | Brantford | 324 Grand River Ave. | 2004 | 43°08'19.0" | -80°17'33.5" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
26060 | Kitchener | West Ave./Homewood Ave. | 1990 | 43°26'37.8" | -80°30'13.7" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
27067 | St. Catharines | Argyle Cres., Pump Stn. | 1987 | 43°09'36.2" | -79°14'05.1" | 4 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
28028 | Guelph | Exhibition St./Clark St. W. | 2000 | 43°33'05.8" | -80°15'51.0" | 4 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 1987 | 43°15'28.0" | -79°51'42.0" | 4 | A/RS/C/N | Y | T | T | T | T | T | T |
29118 | Hamilton West | Main St. W./Hwy 403 | 1985 | 43°15'26.8" | -79°54'27.9" | 3 | A/RS/N | Y | T | T | T | N/A | N/A | N/A |
29214 | Hamilton Mountain | 250 Fennell Ave. W. | 2019 | 43°14'28.4" | -79°53'21.9" | 3 | A/C/N | Y | T | T | T | T | N/A | N/A |
31129 | Toronto Downtown | 55 John St., Metro Hall | 2019 | 43°38'43.5" | -79°23'20.7" | 2 | A/RS/C/N | Y | T | T | T | N/A | N/A | N/A |
33003 | Toronto East | Kennedy Rd./Lawrence Ave. E. | 1970 | 43°44'52.5" | -79°16'26.6" | 4 | A/RS/C/N | Y | T | T | T | N/A | N/A | N/A |
34021 | Toronto North | 4905 Dufferin St., ECCC | 1988 | 43°46'53.8" | -79°25'03.8" | 5 | A/RS/C/N | Y | T | T | T | T | T | N/A |
35125 | Toronto West | 125 Resources Rd. | 2003 | 43°42'34.0" | -79°32'36.6" | 8 | A/RS/C/N | Y | T | T | T | T | T | N/A |
44008 | Burlington | North Shore Blvd. E./Lakeshore Rd. | 1979 | 43°18'54.4" | -79°48'09.5" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
44017 | Oakville | EightLine/Glenashton Dr., Halton Reservoir | 2003 | 43°29'12.9" | -79°42'08.2" | 12 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
44029 | Milton | 1120 Main St. E. | 2019 | 43°31'46.7" | -79°51'44.8" | 4 | A/C/N | Y | T | T | T | T | N/A | N/A |
45027 | Oshawa | Brittania Ave. W., Ep Taylor Stables | 2005 | 43°57'07.5" | -78°54'45.2" | 7 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
46090 | Brampton | 109 Mclaughlin Rd. S. | 2000 | 43°41'55.5" | -79°46'51.3" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
46108 | Mississauga | 3359 Mississauga Rd. N., U of T Campus | 2007 | 43°32'49.1" | -79°39'31.3" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
47045 | Barrie | 83 Perry St. | 2001 | 44°22'56.5" | -79°42'08.3" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
48006 | Newmarket | Eagle St. W./Mccaffrey Rd. | 2001 | 44°02'39.5" | -79°28'59.7" | 5 | A/N | Y | T | T | T | N/A | N/A | N/A |
49005 | Parry Sound | 7 Bay St. | 2001 | 45°20'16.3" | -80°02'17.4" | 5 | A/N | Y | T | T | T | N/A | N/A | N/A |
49010 | Dorset | 1026 Bellwood Acres Rd. | 1981 | 45°13'27.4" | -78°55'58.6" | 3 | A/N | Y | N/A | T | T | N/A | N/A | N/A |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 1971 | 45°26'03.6" | -75°40'33.6" | 4 | A/C/N | Y | T | T | T | T | T | N/A |
51010 | Petawawa | Petawawa Research Forest Facility | 2007 | 45°59'48.2" | -77°26'28.3" | 6 | A/N | Y | N/A | T | T | N/A | N/A | N/A |
52023 | Kingston | 23 Beechgrove Lane | 2014 | 44°13'11.5" | -76°31'16.1" | 5 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
54012 | Belleville | 2 Sidney St., Water Treatment Plant | 2002 | 44°09'01.9" | -77°23'43.8" | 10 | A/N | Y | T | T | T | N/A | N/A | N/A |
56051 | Cornwall | Bedford St./3rd St. W. | 1970 | 45°01'04.7" | -74°44'06.8" | 4 | A/N | Y | T | T | T | N/A | N/A | N/A |
59006 | Peterborough | 10 Hospital Dr. | 1998 | 44°18'06.9" | -78°20'46.4" | 10 | A/C/N | Y | T | T | T | N/A | N/A | N/A |
63203 | Thunder Bay | 421 James St. S. | 2004 | 48°22'45.8" | -89°17'24.6" | 15 | A/RS/C/N | Y | T | T | T | N/A | N/A | N/A |
71078 | Sault Ste. Marie | Sault College | 2004 | 46°31'59.5" | -84°18'35.7" | 8 | A/C/N | Y | T | T | T | T | N/A | T |
75010 | North Bay | Chippewa St. W., Dept. National Defence | 1979 | 46°19'23.5" | -79°26'57.4" | 4 | A/RS/N | Y | T | T | T | N/A | N/A | N/A |
77233 | Sudbury | 155 Elm St. | 2013 | 46°29'31.0" | -81°00'11.2" | 3 | A/C/N | Y | T | T | T | T | N/A | N/A |
Total | 39 | 36 | 39 | 39 | 11 | 5 | 4 |
Notes:
- ID
- station identfication number
- Year
- year station began monitoring
- Air intake
- height of air intake above ground (m)
- Type
- type of monitoring site
- A
- ambient
- RS
- road-side
- C
- Canadian Ambient Air Quality Standard (CAAQS)
- N
- National Air Pollution Surveillance (NAPS)
- AQHI
- Air Quality Health Index
- T
- telemetry
- NO2
- nitrogen dioxide
- PM2.5
- fine particulate matter
- O3
- ground-level ozone
- SO2
- sulphur dioxide
- CO
- carbon monoxide
- TRS
- total reduced sulphur
- Y
- yes
2021 annual statistics
2021 nitric oxide (NO) annual statistics
Unit: parts per billion (ppb)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 1h | Max 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8688 | 0.3 | 0.5 | 0.9 | 1.60 | 4.1 | 33.8 | 2.5 | 219.8 | 43.6 |
12016 | Windsor West | College Ave./South St. | 8636 | 0.0 | 0.2 | 0.5 | 1.10 | 3.6 | 40.0 | 2.3 | 143.3 | 35.3 |
13001 | Chatham | 435 Grand Ave. W. | 8744 | 0.0 | 0.2 | 0.4 | 1.00 | 2.7 | 12.2 | 1.2 | 63.7 | 10.7 |
14111 | Sarnia | 700 Christina St. N. | 8682 | 0.6 | 1.0 | 1.2 | 1.70 | 3.0 | 14.0 | 1.9 | 84.7 | 11.2 |
15020 | Grand Bend | Point Blake Conservation Area | 8627 | 0.0 | 0.3 | 0.3 | 0.40 | 0.7 | 2.0 | 0.4 | 21.9 | 1.6 |
15026 | London | 42 St. Julien St. | 8677 | 0.0 | 0.1 | 0.3 | 0.60 | 1.4 | 13.1 | 0.9 | 54.1 | 12.5 |
16015 | Port Stanley | 43665 Dexter Line, Elgin Water T. Plt | 8247 | 0.0 | 0.0 | 0.1 | 0.20 | 0.8 | 2.5 | 0.3 | 13.0 | 2.6 |
21005 | Brantford | 324 Grand River Ave. | 8656 | 0.0 | 0.1 | 0.2 | 0.40 | 1.5 | 9.1 | 0.7 | 42.7 | 8.1 |
26060 | Kitchener | West Ave./Homewood Ave. | 8695 | 0.1 | 0.2 | 0.3 | 0.50 | 1.4 | 13.2 | 0.9 | 65.5 | 16.3 |
27067 | St. Catharines | Argyle Cres., Pump Stn. | 8697 | 0.2 | 0.2 | 0.4 | 0.70 | 1.6 | 12.2 | 1.0 | 87.1 | 12.5 |
28028 | Guelph | Exhibition St./Clark St. W. | 8675 | 0.1 | 0.2 | 0.3 | 0.50 | 1.4 | 15.9 | 1.0 | 82.6 | 18.0 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8623 | 0.6 | 0.8 | 1.3 | 2.40 | 7.8 | 35.0 | 3.5 | 163.3 | 45.4 |
29118 | Hamilton West | Main St. W./Hwy 403 | 8679 | 0.2 | 0.4 | 0.9 | 2.20 | 7.6 | 37.1 | 3.2 | 113.9 | 25.2 |
29214 | Hamilton Mountain | 250 Fennell Ave. W. | 8693 | 0.2 | 0.3 | 0.5 | 0.90 | 3.1 | 14.4 | 1.4 | 55.3 | 14.3 |
31129 | Toronto Downtown | 55 John St. | 8213 | 0.5 | 1.2 | 2.1 | 4.20 | 10.9 | 39.0 | 4.8 | 323.0 | 36.7 |
33003 | Toronto East | Kennedy Rd./Lawrence Ave. E. | 8677 | 0.0 | 0.4 | 0.9 | 1.90 | 4.8 | 30.5 | 2.4 | 121.2 | 32.3 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8527 | 0.7 | 0.9 | 1.2 | 2.00 | 4.8 | 32.2 | 2.8 | 108.8 | 27.0 |
35125 | Toronto West | 125 Resources Rd. | 8669 | 0.1 | 0.8 | 2.2 | 5.40 | 14.3 | 59.5 | 6.0 | 196.7 | 48.2 |
44008 | Burlington | North Shore Blvd. E./Lakeshore Rd. | 8684 | 0.0 | 0.4 | 0.8 | 1.70 | 4.6 | 22.0 | 2.1 | 115.1 | 25.6 |
44017 | Oakville | EightLine/Glenashton Dr., Halton Res. | 8545 | 0.4 | 0.6 | 0.8 | 1.20 | 2.9 | 14.2 | 1.6 | 109.3 | 16.0 |
44029 | Milton | 1120 Main St. E. | 8628 | 0.3 | 0.5 | 0.8 | 1.50 | 4.4 | 36.1 | 2.6 | 150.5 | 26.5 |
45027 | Oshawa | Brittania Ave. W., EP Taylor Stables | 8723 | 0.0 | 0.3 | 0.5 | 0.70 | 1.4 | 6.6 | 0.7 | 31.5 | 8.2 |
46090 | Brampton | 109 McLaughlin Rd. S. | 8660 | 0.0 | 0.2 | 0.3 | 0.70 | 3.0 | 26.0 | 1.5 | 94.8 | 23.9 |
46108 | Mississauga | 3359 Mississauga Rd. N., U of T Campus | 8384 | 0.1 | 0.1 | 0.3 | 0.70 | 3.2 | 25.5 | 1.6 | 86.6 | 20.7 |
47045 | Barrie | 83 Perry St. | 8727 | 0.2 | 0.4 | 0.6 | 0.80 | 2.1 | 21.3 | 1.4 | 100.3 | 14.8 |
48006 | Newmarket | Eagle St. W./McCaffrey Rd. | 8697 | 0.1 | 0.3 | 0.4 | 0.70 | 1.5 | 10.6 | 0.9 | 61.3 | 11.6 |
49005 | Parry Sound | 7 Bay St. | 8697 | 0.1 | 0.2 | 0.3 | 0.40 | 0.8 | 6.1 | 0.5 | 27.7 | 4.8 |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 8755 | 0.4 | 0.6 | 0.8 | 1.10 | 2.4 | 14.5 | 1.5 | 88.5 | 15.4 |
52023 | Kingston | 23 Beechgrove Lane | 8682 | 0.2 | 0.3 | 0.4 | 0.60 | 1.3 | 5.2 | 0.7 | 24.1 | 5.6 |
54012 | Belleville | 2 Sidney St., Water Treatment Plant | 8622 | 0.0 | 0.2 | 0.4 | 0.70 | 2.8 | 17.1 | 1.3 | 65.7 | 18.1 |
56051 | Cornwall | Bedford St./3rd St. W. | 8692 | 0.1 | 0.3 | 0.4 | 0.60 | 1.5 | 30.8 | 1.4 | 109.0 | 24.4 |
59006 | Peterborough | 10 Hospital Dr. | 8692 | 0.0 | 0.1 | 0.2 | 0.50 | 1.4 | 11.3 | 0.8 | 49.4 | 10.0 |
63203 | Thunder Bay | 421 James St. S. | 8756 | 0.8 | 1.0 | 1.4 | 2.40 | 8.3 | 30.2 | 3.5 | 119.0 | 30.8 |
71078 | Sault Ste. Marie | Sault College | 8271 | 0.2 | 0.3 | 0.5 | 1.10 | 3.1 | 12.4 | 1.4 | 46.6 | 7.3 |
75010 | North Bay | Chippewa St. W., Dept. National Defence | 8624 | 0.4 | 0.5 | 0.6 | 1.00 | 2.3 | 18.0 | 1.5 | 65.0 | 14.5 |
77233 | Sudbury | 155 Elm St. | 8658 | 0.3 | 0.5 | 0.8 | 1.30 | 3.4 | 22.0 | 1.9 | 115.4 | 21.7 |
2021 nitrogen dioxide (NO2) annual statistics
Unit: parts per billion (ppb)
NO2 1h AAQC: 200 ppb
NO2 24h AAQC: 100 ppb
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 1h | Max 24h | Number of times above 1h criteria | Number of times above 24h criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8688 | 3.5 | 5.3 | 7.4 | 10.8 | 18.6 | 34.7 | 9.6 | 51.0 | 27.3 | 0 | 0 |
12016 | Windsor West | College Ave./South St. | 8636 | 2.5 | 4.2 | 6.3 | 9.6 | 16.9 | 36.1 | 8.4 | 56.6 | 27.2 | 0 | 0 |
13001 | Chatham | 435 Grand Ave. W. | 8744 | 1.8 | 2.8 | 3.9 | 5.8 | 9.7 | 21.9 | 5.1 | 43.8 | 20.8 | 0 | 0 |
14111 | Sarnia | 700 Christina St. N. | 8682 | 1.3 | 2.8 | 4.8 | 8.2 | 15.2 | 28.7 | 6.8 | 50.1 | 23.5 | 0 | 0 |
15020 | Grand Bend | Point Blake Conservation Area | 8627 | 0.6 | 1.2 | 1.9 | 2.9 | 4.8 | 8.7 | 2.4 | 17.4 | 9.0 | 0 | 0 |
15026 | London | 42 St. Julien St. | 8677 | 1.8 | 2.8 | 4.0 | 5.8 | 10.1 | 22.3 | 5.2 | 36.3 | 17.2 | 0 | 0 |
16015 | Port Stanley | 43665 Dexter Line, Elgin Water T. Plt | 8247 | 0.7 | 1.2 | 1.8 | 2.5 | 4.2 | 8.2 | 2.2 | 21.3 | 6.9 | 0 | 0 |
21005 | Brantford | 324 Grand River Ave. | 8656 | 1.6 | 2.4 | 3.4 | 5.1 | 9.4 | 18.6 | 4.6 | 37.9 | 16.8 | 0 | 0 |
26060 | Kitchener | West Ave./Homewood Ave. | 8695 | 1.2 | 2.2 | 3.3 | 5.2 | 10.1 | 25.0 | 4.8 | 44.2 | 19.0 | 0 | 0 |
27067 | St. Catharines | Argyle Cres., Pump Stn. | 8697 | 2.2 | 3.2 | 4.3 | 6.2 | 11.1 | 23.7 | 5.8 | 36.4 | 17.4 | 0 | 0 |
28028 | Guelph | Exhibition St./Clark St. W. | 8675 | 1.8 | 2.7 | 4.0 | 6.0 | 10.7 | 26.0 | 5.5 | 39.8 | 19.4 | 0 | 0 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8623 | 2.9 | 4.8 | 7.5 | 11.9 | 21.5 | 39.3 | 10.2 | 55.4 | 40.9 | 0 | 0 |
29118 | Hamilton West | Main St. W./Hwy 403 | 8679 | 3.0 | 4.9 | 7.6 | 11.8 | 21.0 | 34.6 | 10.1 | 48.5 | 33.2 | 0 | 0 |
29214 | Hamilton Mountain | 250 Fennell Ave. W. | 8693 | 0.7 | 2.1 | 4.1 | 7.2 | 15.3 | 31.0 | 6.3 | 48.7 | 33.3 | 0 | 0 |
31129 | Toronto Downtown | 55 John St. | 8213 | 5.0 | 7.7 | 10.6 | 14.7 | 23.6 | 38.7 | 12.7 | 74.2 | 37.3 | 0 | 0 |
33003 | Toronto East | Kennedy Rd./Lawrence Ave. E. | 8677 | 3.0 | 4.9 | 7.0 | 10.6 | 19.5 | 39.0 | 9.5 | 62.8 | 30.8 | 0 | 0 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8527 | 2.7 | 4.6 | 6.9 | 10.7 | 19.4 | 37.2 | 9.3 | 52.7 | 31.4 | 0 | 0 |
35125 | Toronto West | 125 Resources Rd. | 8669 | 3.9 | 7.2 | 10.5 | 15.3 | 25.7 | 41.6 | 12.9 | 56.7 | 31.8 | 0 | 0 |
44008 | Burlington | North Shore Blvd. E./Lakeshore Rd. | 8684 | 2.6 | 4.7 | 6.9 | 10.0 | 17.5 | 33.1 | 8.7 | 50.4 | 26.8 | 0 | 0 |
44017 | Oakville | EightLine/Glenashton Dr., Halton Res. | 8545 | 2.1 | 3.5 | 5.2 | 8.1 | 15.2 | 30.4 | 7.3 | 63.2 | 30.8 | 0 | 0 |
44029 | Milton | 1120 Main St. E. | 8628 | 1.9 | 3.6 | 5.4 | 8.7 | 18.5 | 38.3 | 8.2 | 61.2 | 32.2 | 0 | 0 |
45027 | Oshawa | Brittania Ave. W., EP Taylor Stables | 8723 | 0.9 | 1.5 | 2.4 | 3.7 | 7.2 | 15.1 | 3.4 | 27.0 | 14.0 | 0 | 0 |
46090 | Brampton | 109 McLaughlin Rd. S. | 8660 | 1.1 | 2.3 | 4.1 | 7.3 | 15.2 | 31.3 | 6.5 | 44.8 | 27.8 | 0 | 0 |
46108 | Mississauga | 3359 Mississauga Rd. N., U of T Campus | 8384 | 1.8 | 3.2 | 5.0 | 7.9 | 15.1 | 28.9 | 7.0 | 42.4 | 25.3 | 0 | 0 |
47045 | Barrie | 83 Perry St. | 8727 | 1.6 | 2.6 | 3.7 | 5.7 | 11.9 | 29.6 | 5.6 | 51.0 | 24.3 | 0 | 0 |
48006 | Newmarket | Eagle St. W./McCaffrey Rd. | 8697 | 0.8 | 1.7 | 2.8 | 4.7 | 9.9 | 24.9 | 4.5 | 42.1 | 19.3 | 0 | 0 |
49005 | Parry Sound | 7 Bay St. | 8697 | 0.6 | 1.1 | 1.6 | 2.4 | 5.1 | 17.0 | 2.5 | 35.4 | 13.5 | 0 | 0 |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 8755 | 1.4 | 2.4 | 3.6 | 6.1 | 12.7 | 28.3 | 5.7 | 47.6 | 23.5 | 0 | 0 |
52023 | Kingston | 23 Beechgrove Lane | 8682 | 1.2 | 1.8 | 2.5 | 3.8 | 7.7 | 21.0 | 3.8 | 42.6 | 17.2 | 0 | 0 |
54012 | Belleville | 2 Sidney St., Water Treatment Plant | 8622 | 0.9 | 1.6 | 2.4 | 3.9 | 8.2 | 21.8 | 3.8 | 35.0 | 16.2 | 0 | 0 |
56051 | Cornwall | Bedford St./3rd St. W. | 8692 | 1.1 | 1.9 | 2.8 | 4.7 | 10.7 | 30.5 | 4.8 | 52.1 | 22.2 | 0 | 0 |
59006 | Peterborough | 10 Hospital Dr. | 8692 | 0.9 | 1.6 | 2.6 | 4.1 | 8.5 | 23.7 | 4.1 | 42.6 | 20.2 | 0 | 0 |
63203 | Thunder Bay | 421 James St. S. | 8756 | 1.6 | 2.7 | 4.4 | 7.2 | 14.6 | 30.6 | 6.5 | 45.2 | 26.0 | 0 | 0 |
71078 | Sault Ste. Marie | Sault College | 8271 | 1.2 | 1.9 | 2.7 | 4.2 | 8.3 | 18.4 | 4.0 | 50.7 | 12.4 | 0 | 0 |
75010 | North Bay | Chippewa St. W., Dept. National Defence | 8624 | 0.8 | 1.4 | 2.1 | 3.6 | 8.8 | 27.2 | 3.9 | 36.5 | 19.7 | 0 | 0 |
77233 | Sudbury | 155 Elm St. | 8658 | 1.4 | 2.2 | 3.4 | 5.6 | 12.0 | 34.1 | 5.6 | 56.2 | 24.3 | 0 | 0 |
2021 nitrogen oxides (NOx) annual statistics
Unit: parts per billion (ppb)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 1h | Max 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8688 | 4.1 | 6.2 | 8.6 | 12.4 | 21.9 | 66.6 | 12.1 | 259.6 | 66.7 |
12016 | Windsor West | College Ave./South St. | 8636 | 2.8 | 4.8 | 7.2 | 10.9 | 19.7 | 69.2 | 10.7 | 199.6 | 59.5 |
13001 | Chatham | 435 Grand Ave. W. | 8744 | 1.9 | 3.1 | 4.6 | 6.9 | 11.9 | 31.6 | 6.3 | 107.5 | 29.6 |
14111 | Sarnia | 700 Christina St. N. | 8682 | 2.2 | 4.0 | 6.0 | 9.9 | 18.0 | 40.4 | 8.7 | 114.0 | 28.8 |
15020 | Grand Bend | Point Blake Conservation Area | 8627 | 0.8 | 1.5 | 2.2 | 3.3 | 5.4 | 9.8 | 2.8 | 32.2 | 9.9 |
15026 | London | 42 St. Julien St. | 8677 | 2.0 | 3.1 | 4.4 | 6.5 | 11.4 | 30.2 | 6.1 | 77.4 | 25.3 |
16015 | Port Stanley | 43665 Dexter Line, Elgin Water T. Plt | 8247 | 0.7 | 1.3 | 1.9 | 2.8 | 4.8 | 9.8 | 2.5 | 31.6 | 8.9 |
21005 | Brantford | 324 Grand River Ave. | 8656 | 1.6 | 2.6 | 3.7 | 5.6 | 10.8 | 25.5 | 5.3 | 62.0 | 24.9 |
26060 | Kitchener | West Ave./Homewood Ave. | 8695 | 1.5 | 2.4 | 3.7 | 5.8 | 11.3 | 35.9 | 5.7 | 98.0 | 29.1 |
27067 | St. Catharines | Argyle Cres., Pump Stn. | 8697 | 2.5 | 3.6 | 4.9 | 6.9 | 12.5 | 33.3 | 6.8 | 105.5 | 27.4 |
28028 | Guelph | Exhibition St./Clark St. W. | 8675 | 2.1 | 3.1 | 4.4 | 6.5 | 12.1 | 40.7 | 6.5 | 103.8 | 31.7 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8623 | 3.8 | 6.0 | 9.1 | 14.6 | 28.6 | 67.6 | 13.7 | 216.7 | 86.3 |
29118 | Hamilton West | Main St. W./Hwy 403 | 8679 | 3.4 | 5.7 | 8.9 | 14.3 | 28.4 | 64.7 | 13.2 | 141.5 | 58.3 |
29214 | Hamilton Mountain | 250 Fennell Ave. W. | 8693 | 1.1 | 2.6 | 4.8 | 8.4 | 18.2 | 41.3 | 7.7 | 102.2 | 47.6 |
31129 | Toronto Downtown | 55 John St. | 8213 | 5.9 | 9.5 | 13.4 | 18.9 | 33.0 | 73.9 | 17.4 | 397.2 | 66.5 |
33003 | Toronto East | Kennedy Rd./Lawrence Ave. E. | 8677 | 3.3 | 5.8 | 8.2 | 12.3 | 23.4 | 64.77 | 11.9 | 168.7 | 61.0 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8527 | 3.7 | 5.9 | 8.5 | 12.6 | 23.2 | 66.34 | 12.1 | 147.2 | 50.7 |
35125 | Toronto West | 125 Resources Rd. | 8669 | 4.5 | 8.7 | 13.5 | 20.6 | 38.5 | 93.26 | 18.9 | 226.4 | 74.7 |
44008 | Burlington | North Shore Blvd. E./Lakeshore Rd. | 8684 | 2.9 | 5.2 | 7.8 | 11.7 | 21.2 | 51.43 | 10.7 | 165.6 | 51.4 |
44017 | Oakville | EightLine/Glenashton Dr., Halton Res. | 8545 | 2.8 | 4.2 | 6.2 | 9.4 | 17.9 | 41.6 | 8.8 | 150.2 | 43.9 |
44029 | Milton | 1120 Main St. E. | 8628 | 2.5 | 4.4 | 6.5 | 10.2 | 22.7 | 67.77 | 10.8 | 196.2 | 58.5 |
45027 | Oshawa | Brittania Ave. W., EP Taylor Stables | 8723 | 1.2 | 2 | 2.9 | 4.3 | 8.3 | 19.4 | 4.1 | 56.9 | 21.1 |
46090 | Brampton | 109 McLaughlin Rd. S. | 8660 | 1.4 | 2.6 | 4.5 | 8.2 | 18.0 | 51.98 | 8.0 | 132.0 | 50.0 |
46108 | Mississauga | 3359 Mississauga Rd. N., U of T Campus | 8384 | 2.1 | 3.5 | 5.5 | 8.8 | 18.1 | 50.02 | 8.6 | 115.7 | 38.8 |
47045 | Barrie | 83 Perry St. | 8727 | 2.1 | 3.1 | 4.3 | 6.5 | 14.0 | 46.8 | 7.0 | 151.3 | 36.5 |
48006 | Newmarket | Eagle St. W./McCaffrey Rd. | 8697 | 1.2 | 2.1 | 3.3 | 5.4 | 11.2 | 34.11 | 5.4 | 81.9 | 26.0 |
49005 | Parry Sound | 7 Bay St. | 8697 | 0.8 | 1.3 | 1.9 | 2.8 | 6.0 | 20 | 3.1 | 58.9 | 18.3 |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 8755 | 2 | 3.2 | 4.5 | 7.3 | 14.8 | 40.8 | 7.2 | 118.0 | 35.1 |
52023 | Kingston | 23 Beechgrove Lane | 8682 | 1.5 | 2.2 | 3 | 4.4 | 8.7 | 25.62 | 4.5 | 66.8 | 22.8 |
54012 | Belleville | 2 Sidney St., Water Treatment Plant | 8622 | 1.1 | 1.9 | 2.9 | 4.9 | 11.1 | 37.64 | 5.1 | 94.2 | 29.3 |
56051 | Cornwall | Bedford St./3rd St. W. | 8692 | 1.4 | 2.2 | 3.3 | 5.2 | 12.6 | 53.83 | 6.2 | 158.3 | 39.8 |
59006 | Peterborough | 10 Hospital Dr. | 8692 | 1.1 | 1.9 | 2.9 | 4.6 | 9.9 | 33.81 | 4.8 | 92.0 | 28.5 |
63203 | Thunder Bay | 421 James St. S. | 8756 | 2.6 | 4 | 6.2 | 10.1 | 22.3 | 54.15 | 10.0 | 155.5 | 56.7 |
71078 | Sault Ste. Marie | Sault College | 8271 | 1.5 | 2.3 | 3.4 | 5.4 | 11.4 | 28.23 | 5.3 | 97.3 | 19.7 |
75010 | North Bay | Chippewa St. W., Dept. National Defence | 8624 | 1.3 | 2 | 2.9 | 4.7 | 11.2 | 42.13 | 5.4 | 96.4 | 31.5 |
77233 | Sudbury | 155 Elm St. | 8658 | 1.8 | 2.9 | 4.4 | 6.7 | 15.5 | 51.63 | 7.5 | 158.5 | 44.5 |
2021 fine particulate matter (PM2.5) annual statistics
Unit: micrograms per cubic metre (μg/m3)
PM2.5 24h AAQC: 27 μg/m3
PM2.5 Annual AAQC: 8.8 μg/m3
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 1h | Max 24h | Number of times above 24h criteria | Number of times above annual criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8730 | 2 | 5 | 7 | 10 | 16 | 29 | 8.3 | 54 | 22.9 | 0 | 0 |
12016 | Windsor West | College Ave./South St. | 8527 | 3 | 6 | 8 | 12 | 18 | 32 | 9.6 | 53 | 27.5 | 1 | 1 |
13001 | Chatham | 435 Grand Ave. W. | 8613 | 1 | 3 | 6 | 9 | 14 | 26 | 7.1 | 43 | 22.8 | 0 | 0 |
14111 | Sarnia | 700 Christina St. N. | 8645 | 2 | 3 | 6 | 10 | 16 | 29 | 7.7 | 63 | 28.4 | 1 | 0 |
15020 | Grand Bend | Point Blake Conservation Area | 8720 | 2 | 3 | 5 | 7 | 11 | 21 | 5.7 | 43 | 23.0 | 0 | 0 |
15026 | London | 42 St. Julien St. | 8742 | 2 | 4 | 7 | 10 | 15 | 26 | 7.8 | 43 | 27.0 | 0 | 0 |
16015 | Port Stanley | 43665 Dexter Line, Elgin Water T. Plt | 8522 | 2 | 4 | 6 | 8 | 14 | 25 | 7.0 | 66 | 27.5 | 1 | 0 |
18007 | Tiverton | 4th Concession/Bruce Rd. 23 | 8075 | 1 | 2 | 4 | 7 | 11 | 22 | 5.4 | 41 | 23.6 | 0 | 0 |
21005 | Brantford | 324 Grand River Ave. | 8693 | 2 | 4 | 6 | 9 | 15 | 26 | 7.7 | 51 | 30.0 | 2 | 0 |
26060 | Kitchener | West Ave./Homewood Ave. | 8535 | 1 | 3 | 6 | 10 | 17 | 32 | 7.8 | 57 | 35.8 | 1 | 0 |
27067 | St. Catharines | Argyle Cres., Pump Stn. | 8552 | 2 | 3 | 5 | 8 | 13 | 24 | 6.5 | 46 | 25.5 | 0 | 0 |
28028 | Guelph | Exhibition St./Clark St. W. | 8669 | 2 | 3 | 6 | 9 | 16 | 30 | 7.7 | 69 | 34.5 | 2 | 0 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8589 | 2 | 4 | 7 | 11 | 18 | 32 | 8.9 | 86 | 34.4 | 4 | 1 |
29118 | Hamilton West | Main St. W./Hwy 403 | 8624 | 2 | 4 | 6 | 9 | 16 | 30 | 8.0 | 63 | 32.7 | 2 | 0 |
29214 | Hamilton Mountain | 250 Fennell Ave. W. | 8672 | 2 | 4 | 7 | 10 | 16 | 29 | 8.0 | 62 | 30.2 | 1 | 0 |
31129 | Toronto Downtown | 55 John St. | 8699 | 3 | 5 | 7 | 10 | 16 | 32 | 8.4 | 170 | 58.7 | 3 | 0 |
33003 | Toronto East | Kennedy Rd./Lawrence Ave. E. | 8674 | 2 | 4 | 6 | 9 | 14 | 30 | 7.4 | 70 | 35.1 | 4 | 0 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8611 | 2 | 4 | 6 | 9 | 14 | 31 | 7.4 | 69 | 30.2 | 2 | 0 |
35125 | Toronto West | 125 Resources Rd. | 8651 | 2 | 4 | 6 | 9 | 14 | 31 | 7.7 | 93 | 43.2 | 2 | 0 |
44008 | Burlington | North Shore Blvd. E./Lakeshore Rd. | 8751 | 2 | 3 | 6 | 9 | 14 | 29 | 7.2 | 60 | 26.6 | 0 | 0 |
44017 | Oakville | EightLine/Glenashton Dr., Halton Res. | 8718 | 2 | 4 | 6 | 8 | 14 | 27 | 7.1 | 76 | 33.9 | 1 | 0 |
44029 | Milton | 1120 Main St. E. | 8678 | 2 | 4 | 6 | 9 | 15 | 30 | 7.6 | 89 | 29.3 | 1 | 0 |
45027 | Oshawa | Brittania Ave. W., EP Taylor Stables | 8716 | 2 | 3 | 5 | 7 | 12 | 27 | 6.2 | 78 | 32.2 | 1 | 0 |
46090 | Brampton | 109 McLaughlin Rd. S. | 8688 | 2 | 4 | 6 | 8 | 14 | 29 | 7.2 | 92 | 33.4 | 1 | 0 |
46108 | Mississauga | 3359 Mississauga Rd. N., U of T Campus | 8373 | 1 | 3 | 6 | 10 | 16 | 30 | 7.6 | 77 | 40.1 | 1 | 0 |
47045 | Barrie | 83 Perry St. | 8447 | 2 | 3 | 5 | 8 | 13 | 30 | 6.9 | 129 | 45.5 | 2 | 0 |
48006 | Newmarket | Eagle St. W./McCaffrey Rd. | 8751 | 2 | 3 | 5 | 8 | 13 | 26 | 6.5 | 65 | 30.1 | 2 | 0 |
49005 | Parry Sound | 7 Bay St. | 8750 | 1 | 2 | 4 | 6 | 11 | 21 | 5.0 | 49 | 27.7 | 1 | 0 |
49010 | Dorset | 1026 Bellwood Acres Rd. | 8720 | 1 | 2 | 3 | 6 | 11 | 22 | 4.7 | 78 | 37.1 | 1 | 0 |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 8657 | 2 | 3 | 5 | 7 | 12 | 24 | 6.3 | 54 | 33.7 | 2 | 0 |
51010 | Petawawa | Petawawa Research Forest Facility | 8620 | 2 | 2 | 3 | 5 | 8 | 20 | 4.3 | 41 | 30.2 | 1 | 0 |
52023 | Kingston | 23 Beechgrove Lane | 8701 | 1 | 3 | 5 | 8 | 13 | 27 | 6.5 | 74 | 35.1 | 3 | 0 |
54012 | Belleville | 2 Sidney St., Water Treatment Plant | 8549 | 2 | 3 | 5 | 7 | 11 | 23 | 6.0 | 65 | 37.7 | 2 | 0 |
56051 | Cornwall | Bedford St./3rd St. W. | 8570 | 2 | 3 | 5 | 7 | 13 | 30 | 6.5 | 66 | 32.6 | 2 | 0 |
59006 | Peterborough | 10 Hospital Dr. | 8738 | 1 | 2 | 4 | 8 | 15 | 31 | 6.5 | 67 | 28.6 | 1 | 0 |
63203 | Thunder Bay | 421 James St. S. | 8736 | 2 | 3 | 5 | 7 | 12 | 41 | 6.6 | 127 | 52.2 | 7 | 0 |
71078 | Sault Ste. Marie | Sault College | 8698 | 2 | 3 | 4 | 6 | 11 | 31 | 5.8 | 101 | 44.8 | 4 | 0 |
75010 | North Bay | Chippewa St. W., Dept. National Defence | 8743 | 2 | 3 | 4 | 6 | 11 | 25 | 5.7 | 91 | 37.0 | 2 | 0 |
77233 | Sudbury | 155 Elm St. | 8694 | 2 | 3 | 4 | 6 | 11 | 28 | 5.8 | 163 | 48.8 | 3 | 0 |
Notes
- Measurements taken by SHARP 5030.
- The PM2.5 AAQC values, based on the 24-hour PM2.5 Canadian Ambient Air Quality Standard (CAAQS), are used "as is" for comparison to an average concentration in a year.
2021 ground-level ozone (O3) annual statistics
Unit: parts per billion (ppb)
O3 1h AAQC: 80 ppb
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 1h | Max 24h | Number of times above 1h criterion |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8689 | 13 | 22 | 28 | 35 | 46 | 64 | 28.8 | 82 | 56.13 | 2 |
12016 | Windsor West | College Ave./South St. | 8680 | 13 | 23 | 29 | 35 | 46 | 64 | 29.4 | 86 | 57 | 2 |
13001 | Chatham | 435 Grand Ave. W. | 8745 | 17 | 24 | 30 | 35 | 46 | 62 | 30.4 | 75 | 59.92 | 0 |
14111 | Sarnia | 700 Christina St. N. | 8445 | 15 | 23 | 28 | 36 | 47 | 68 | 30.2 | 97 | 57.79 | 6 |
15020 | Grand Bend | Point Blake Conservation Area | 8618 | 17 | 26 | 32 | 37 | 45 | 66 | 32.0 | 104 | 62.13 | 18 |
15026 | London | 42 St. Julien St. | 8675 | 11 | 22 | 29 | 35 | 45 | 61 | 28.9 | 78 | 59.83 | 0 |
16015 | Port Stanley | 43665 Dexter Line, Elgin Water T. Plt | 8688 | 18 | 25 | 31 | 36 | 46 | 63 | 31.4 | 74 | 58.67 | 0 |
18007 | Tiverton | 4th Concession/Bruce Rd. 23 | 8593 | 19 | 27 | 32 | 37 | 45 | 64 | 32.4 | 78 | 64.5 | 0 |
21005 | Brantford | 324 Grand River Ave. | 8660 | 11 | 22 | 29 | 35 | 45 | 62 | 28.5 | 79 | 61.21 | 0 |
26060 | Kitchener | West Ave./Homewood Ave. | 8693 | 14 | 23 | 28 | 34 | 42 | 60 | 28.4 | 81 | 58.33 | 1 |
27067 | St. Catharines | Argyle Cres., Pump Stn. | 8645 | 13 | 24 | 30 | 36 | 45 | 62 | 29.8 | 73 | 61.71 | 0 |
28028 | Guelph | Exhibition St./Clark St. W. | 8676 | 13 | 23 | 30 | 35 | 44 | 63 | 29.5 | 83 | 61.08 | 4 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8623 | 10 | 19 | 26 | 32 | 43 | 60 | 26.4 | 80 | 61.92 | 0 |
29118 | Hamilton West | Main St. W./Hwy 403 | 8683 | 6 | 18 | 25 | 31 | 41 | 58 | 24.9 | 78 | 59.79 | 0 |
29214 | Hamilton Mountain | 250 Fennell Ave. W. | 8694 | 13 | 22 | 28 | 34 | 44 | 61 | 28.7 | 80 | 62.54 | 0 |
31129 | Toronto Downtown | 55 John St. | 8753 | 11 | 20 | 26 | 31 | 41 | 61 | 26.3 | 86 | 57.5 | 4 |
33003 | Toronto East | Kennedy Rd./Lawrence Ave. E. | 8677 | 10 | 20 | 26 | 32 | 41 | 60 | 26.2 | 78 | 55.08 | 0 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8466 | 9 | 19 | 26 | 32 | 43 | 64 | 26.4 | 86 | 61.39 | 3 |
35125 | Toronto West | 125 Resources Rd. | 8667 | 5 | 15 | 22 | 29 | 39 | 61 | 22.8 | 81 | 56.13 | 1 |
44008 | Burlington | North Shore Blvd. E./Lakeshore Rd. | 8681 | 11 | 21 | 27 | 34 | 43 | 60 | 27.4 | 80 | 59.38 | 0 |
44017 | Oakville | EightLine/Glenashton Dr., Halton Res. | 8700 | 13 | 22 | 29 | 34 | 44 | 63 | 28.8 | 84 | 61.83 | 2 |
44029 | Milton | 1120 Main St. E. | 8663 | 9 | 21 | 28 | 34 | 43 | 63 | 27.2 | 84 | 61.54 | 3 |
45027 | Oshawa | Brittania Ave. W., EP Taylor Stables | 8704 | 9 | 21 | 28 | 33 | 42 | 62 | 26.9 | 80 | 47.58 | 0 |
46090 | Brampton | 109 McLaughlin Rd. S. | 8670 | 11 | 22 | 29 | 35 | 44 | 64 | 28.3 | 84 | 61.33 | 3 |
46108 | Mississauga | 3359 Mississauga Rd. N., U of T Campus | 8390 | 8 | 19 | 27 | 33 | 42 | 61 | 26.2 | 81 | 60.75 | 1 |
47045 | Barrie | 83 Perry St. | 8727 | 9 | 19 | 25 | 31 | 39 | 55 | 25.0 | 82 | 50.21 | 1 |
48006 | Newmarket | Eagle St. W./McCaffrey Rd. | 8692 | 15 | 24 | 30 | 36 | 44 | 63 | 30.2 | 81 | 61.58 | 1 |
49005 | Parry Sound | 7 Bay St. | 8700 | 17 | 25 | 30 | 35 | 44 | 61 | 30.3 | 80 | 58.29 | 0 |
49010 | Dorset | 1026 Bellwood Acres Rd. | 8741 | 9 | 21 | 28 | 34 | 42 | 59 | 26.8 | 70 | 47.64 | 0 |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 8756 | 11 | 20 | 26 | 32 | 40 | 56 | 25.8 | 68 | 51.21 | 0 |
51010 | Petawawa | Petawawa Research Forest Facility | 8710 | 11 | 20 | 27 | 33 | 41 | 55 | 26.7 | 66 | 52.33 | 0 |
52023 | Kingston | 23 Beechgrove Lane | 8692 | 15 | 24 | 30 | 36 | 44 | 62 | 30.2 | 78 | 62.5 | 0 |
54012 | Belleville | 2 Sidney St., Water Treatment Plant | 8627 | 14 | 24 | 30 | 36 | 46 | 65 | 30.3 | 82 | 64.29 | 1 |
56051 | Cornwall | Bedford St./3rd St. W. | 8696 | 11 | 21 | 27 | 33 | 42 | 57 | 26.7 | 70 | 58.25 | 0 |
59006 | Peterborough | 10 Hospital Dr. | 8670 | 13 | 22 | 28 | 35 | 43 | 61 | 28.6 | 85 | 57.35 | 1 |
63203 | Thunder Bay | 421 James St. S. | 8759 | 8 | 19 | 25 | 31 | 39 | 50 | 24.4 | 65 | 49.88 | 0 |
71078 | Sault Ste. Marie | Sault College | 8725 | 16 | 24 | 29 | 34 | 42 | 56 | 29.2 | 66 | 52.46 | 0 |
75010 | North Bay | Chippewa St. W., Dept. National Defence | 8411 | 10 | 21 | 27 | 32 | 41 | 58 | 26.4 | 71 | 54.08 | 0 |
77233 | Sudbury | 155 Elm St. | 8635 | 12 | 19 | 24 | 29 | 36 | 47 | 23.9 | 56 | 45.17 | 0 |
2021 sulphur dioxide (SO2) annual statistics
Unit: parts per billion (ppb)
SO2 10 min AAQC: 67 ppb
SO2 1h AAQC: 40 ppb
SO2 1y AAQC: 4 ppb
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 10 min | Max 1h | Max 24h | Number of times above 10 min criteria | Number of times above 1h criteria | Number of times above annual criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8553 | 0.0 | 0.0 | 0.1 | 0.2 | 0.9 | 5.10 | 0.38 | 27.6 | 20.2 | 3.9 | 0 | 0 | 0 |
12016 | Windsor West | College Ave./South St. | 8689 | 0.0 | 0.1 | 0.2 | 0.5 | 1.6 | 7.21 | 0.66 | 28.7 | 22.8 | 5.9 | 0 | 0 | 0 |
14111 | Sarnia | 700 Christina St. N. | 8567 | 0.1 | 0.2 | 0.3 | 0.6 | 4.6 | 37.77 | 2.23 | 133.4 | 84.2 | 31.6 | 85 | 66 | 0 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8620 | 0.0 | 0.2 | 0.4 | 1.2 | 11.6 | 49.76 | 3.82 | 169.8 | 108.5 | 30.8 | 219 | 169 | 0 |
29214 | Hamilton Mountain | 250 Fennell Ave. W. | 8691 | 0.0 | 0.2 | 0.5 | 1.2 | 10.1 | 37.01 | 3.16 | 163.3 | 117.6 | 33.6 | 51 | 60 | 0 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8485 | 0.0 | 0.0 | 0.0 | 0.1 | 0.4 | 2.30 | 0.17 | 15.4 | 9.2 | 2.0 | 0 | 0 | 0 |
35125 | Toronto West | 125 Resources Rd. | 8671 | 0.0 | 0.0 | 0.1 | 0.2 | 0.5 | 2.70 | 0.24 | 22.2 | 11.8 | 2.1 | 0 | 0 | 0 |
44029 | Milton | 1120 Main St. E. | 5327 | 0.4 | 0.6 | 0.8 | 1.2 | 1.6 | 4.10 | INS | 23.5 | 9.5 | 2.5 | 0 | 0 | 0 |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 8652 | 0.0 | 0.1 | 0.1 | 0.2 | 0.3 | 0.70 | 0.16 | 18.5 | 4.6 | 0.7 | 0 | 0 | 0 |
71078 | Sault Ste. Marie | Sault College | 8700 | 0.3 | 0.4 | 0.4 | 0.5 | 0.9 | 10.10 | 0.83 | 61.8 | 40.4 | 6.5 | 0 | 1 | 0 |
77233 | Sudbury | 155 Elm St. | 8679 | 0.0 | 0.1 | 0.2 | 0.3 | 1.3 | 14.14 | 0.85 | 208.6 | 77.9 | 13.9 | 16 | 5 | 0 |
2021 carbon monoxide (CO) annual statistics
Unit: parts per million (ppm)
CO 1h AAQC: 30 ppm
CO 8h AAQC: 13 ppm
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 1h | Max 8h | Number of times above 1h criteria | Number of times above 8h criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8503 | 0.16 | 0.19 | 0.22 | 0.25 | 0.32 | 0.58 | 0.24 | 1.57 | 1.00 | 0 | 0 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8563 | 0.15 | 0.17 | 0.20 | 0.24 | 0.36 | 0.62 | 0.23 | 1.45 | 0.80 | 0 | 0 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8540 | 0.15 | 0.17 | 0.20 | 0.23 | 0.29 | 0.52 | 0.21 | 2.11 | 0.94 | 0 | 0 |
35125 | Toronto West | 125 Resources Rd. | 8588 | 0.16 | 0.19 | 0.22 | 0.26 | 0.35 | 0.64 | 0.24 | 1.18 | 0.95 | 0 | 0 |
51001 | Ottawa Downtown | Rideau St./Wurtemburg St. | 3297 | 0.14 | 0.16 | 0.19 | 0.22 | 0.28 | 0.45 | INS | 0.77 | 0.52 | 0 | 0 |
2021 total reduced sulphur (TRS) compounds annual statistics
Unit: parts per billion (ppb)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Max 1h | Max 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | College Ave./South St. | 8177 | 0 | 0 | 0 | 0 | 0 | 3 | 0.14 | 11 | 2.8 |
14111 | Sarnia | 700 Christina St. N. | 7859 | 0 | 0 | 0 | 0 | 0 | 1 | 0.02 | 2 | 0.7 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8619 | 0 | 0 | 0 | 0 | 0 | 1 | 0.03 | 3 | 0.6 |
71078 | Sault Ste. Marie | Sault College | 8656 | 0 | 0 | 0 | 0 | 1 | 1 | 0.24 | 3 | 1.1 |
2021 benzene annual statistics
Unit: micrograms per cubic metre (μg/m3)
Benzene 24h AAQC: 2.3 μg/m3
Benzene Annual AAQC: 0.45 μg/m3
ID | City | Number of samples | 10% | 25% | 50% | 75% | 90% | Max | Min | Mean | Standard deviation | Number of times above 24h criteria | Number of times above annual criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 41 | 0.267 | 0.332 | 0.419 | 0.570 | 0.703 | 2.029 | 0.188 | 0.527 | 0.389 | 0 | 1 |
14111 | Sarnia | 53 | 0.188 | 0.299 | 0.417 | 0.686 | 1.293 | 1.966 | 0.073 | 0.570 | 0.448 | 0 | 1 |
15026 | London | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
26060 | Kitchener | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
29000 | Hamilton Downtown | 41 | 0.238 | 0.279 | 0.425 | 0.590 | 1.425 | 3.122 | 0.141 | 0.613 | 0.629 | 2 | 1 |
48006 | Newmarket | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
2021 toluene annual statistics
Unit: micrograms per cubic metre (μg/m3)
Toluene 24h AAQC (based on odour): 2,000 μg/m
ID | City | Number of samples | 10% | 25% | 50% | 75% | 90% | Max | Min | Mean | Standard deviation | Number of times above 24h criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 41 | 0.362 | 0.485 | 0.830 | 1.415 | 2.353 | 2.854 | 0.188 | 1.085 | 0.758 | 0 |
14111 | Sarnia | 53 | 0.174 | 0.358 | 0.696 | 1.440 | 2.534 | 4.574 | 0.120 | 1.053 | 1.004 | 0 |
15026 | London | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
26060 | Kitchener | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
29000 | Hamilton Downtown | 41 | 0.302 | 0.408 | 0.706 | 1.311 | 1.795 | 18.517 | 0.151 | 1.314 | 2.822 | 0 |
48006 | Newmarket | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
2021 ethylbenzene annual statistics
Unit: micrograms per cubic metre (μg/m3)
Ethylbenzene 24h AAQC: 1,000 μg/m3
ID | City | Number of samples | 10% | 25% | 50% | 75% | 90% | Max | Min | Mean | Standard deviation | Number of times above 24h criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 41 | 0.072 | 0.084 | 0.154 | 0.277 | 0.341 | 3.299 | 0.035 | 0.328 | 0.691 | 0 |
14111 | Sarnia | 53 | 0.035 | 0.035 | 0.103 | 0.205 | 0.402 | 1.743 | 0.035 | 0.187 | 0.271 | 0 |
15026 | London | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
26060 | Kitchener | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
29000 | Hamilton Downtown | 41 | 0.035 | 0.035 | 0.115 | 0.189 | 0.238 | 2.133 | 0.035 | 0.172 | 0.326 | 0 |
48006 | Newmarket | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
2021 m- and p-xylene annual statistics
Unit: micrograms per cubic metre (μg/m3)
ID | City | Number of samples | 10% | 25% | 50% | 75% | 90% | Max | Min | Mean | Standard deviation |
---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 41 | 0.172 | 0.239 | 0.457 | 0.855 | 1.159 | 2.310 | 0.128 | 0.619 | 0.531 |
14111 | Sarnia | 53 | 0.067 | 0.121 | 0.228 | 0.498 | 0.694 | 1.377 | 0.035 | 0.319 | 0.269 |
15026 | London | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
26060 | Kitchener | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
29000 | Hamilton Downtown | 41 | 0.132 | 0.188 | 0.310 | 0.554 | 0.740 | 4.793 | 0.041 | 0.486 | 0.744 |
48006 | Newmarket | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
2021 o-xylene annual statistics
Unit: micrograms per cubic metre (μg/m3)
ID | City | Number of samples | 10% | 25% | 50% | 75% | 90% | Max | Min | Mean | Standard deviation |
---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 41 | 0.040 | 0.112 | 0.189 | 0.346 | 0.433 | 0.939 | 0.040 | 0.246 | 0.208 |
14111 | Sarnia | 53 | 0.040 | 0.040 | 0.095 | 0.171 | 0.256 | 0.431 | 0.040 | 0.122 | 0.095 |
15026 | London | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
26060 | Kitchener | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
29000 | Hamilton Downtown | 41 | 0.040 | 0.040 | 0.107 | 0.211 | 0.272 | 2.136 | 0.040 | 0.183 | 0.331 |
48006 | Newmarket | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
2021 1,3-butadiene annual statistics
Unit: micrograms per cubic metre (μg/m3)
1,3-Butadiene 24h AAQC: 10.0 μg/m3
1,3-Butadiene Annual AAQC: 2.0 μg/m3
ID | City | Number of samples | 10% | 25% | 50% | 75% | 90% | Max | Min | Mean | Standard deviation | Number of times above 24h criteria | Number of times above annual criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 41 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.097 | 0.035 | 0.038 | 0.012 | 0 | 0 |
14111 | Sarnia | 53 | 0.035 | 0.035 | 0.035 | 0.035 | 0.104 | 0.641 | 0.035 | 0.071 | 0.108 | 0 | 0 |
15026 | London | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
26060 | Kitchener | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
29000 | Hamilton Downtown | 41 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.087 | 0.035 | 0.036 | 0.008 | 0 | 0 |
48006 | Newmarket | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
10-year trends
10-year trend for nitric oxide (NO)
Annual mean (ppb)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 4.7 | 3.7 | 4.0 | 3.5 | 3.1 | 3.3 | 3.2 | 2.7 | 1.7 | 2.5 | -33.4 | SSS |
12016 | Windsor West | 4.6 | 3.6 | 3.8 | 4.2 | 2.9 | 2.6 | 2.6 | 3.1 | 1.7 | 2.3 | -34.8 | SSS |
13001 | Chatham | 1.8 | 1.6 | 1.5 | 1.7 | 1.4 | 1.9 | 1.8 | 1.4 | 1.5 | 1.2 | -5.1 | Non-SSS |
14111 | Sarnia | 2.1 | 1.7 | 1.9 | 2.4 | INS | 1.5 | 1.8 | 1.7 | 1.6 | 1.9 | -6.1 | SSS |
15020 | Grand Bend | 0.3 | 1.0 | 0.2 | 0.3 | 0.5 | 0.3 | 0.2 | 0.3 | 0.4 | 0.4 | 23.1 | Non-SSS |
15026 | London | 4.2 | 1.4 | 1.3 | 1.4 | 1.0 | 1.0 | 0.8 | 0.9 | 0.7 | 0.9 | -22.1 | SSS |
21005 | Brantford | 1.1 | 1.2 | 0.9 | 1.3 | 0.8 | 0.8 | 1.0 | 0.9 | 0.8 | 0.7 | -15.0 | SSS |
26060 | Kitchener | 2.1 | 1.6 | 1.6 | 1.6 | 1.3 | 1.0 | 0.9 | 1.2 | 0.7 | 0.9 | -20.1 | SSS |
27067 | St. Catharines | 2.5 | 2.2 | 1.7 | 2.1 | 1.5 | 1.2 | 0.9 | 1.2 | 0.9 | 1.0 | -42.8 | SSS |
28028 | Guelph | 2.2 | 1.1 | 1.2 | 1.3 | 1.1 | 1.1 | 1.2 | 0.9 | 0.8 | 1.0 | -20.1 | SSS |
29000 | Hamilton Downtown | 4.6 | 4.3 | 3.9 | 1.3 | 4.2 | 3.9 | 3.9 | 4.0 | 2.9 | 3.5 | -17.5 | SSS |
29118 | Hamilton West | 6.3 | 5.4 | 5.9 | 5.1 | 6.2 | 3.9 | 4.2 | 4.2 | 3.2 | 3.2 | -43.8 | SSS |
29214 | Hamilton Mountain | 1.9 | 2.0 | 2.0 | 1.8 | 1.2 | 1.2 | 1.2 | 1.8 | 1.4 | 1.4 | -22.0 | SSS |
33003 | Toronto East | 6.6 | 5.7 | 6.2 | 5.8 | 5.4 | 4.4 | 3.1 | 3.4 | 2.3 | 2.4 | -61.0 | SSS |
34021 | Toronto North | 5.0 | 4.1 | 4.3 | 3.9 | 3.5 | 3.0 | 2.5 | 2.7 | 2.1 | 2.8 | -41.8 | SSS |
35125 | Toronto West | 11.3 | 8.6 | 9.5 | 9.2 | 8.2 | 7.7 | 6.7 | 7.5 | 5.2 | 6.0 | -38.4 | SSS |
44008 | Burlington | 4.6 | 4.6 | 4.6 | 3.9 | 3.9 | 3.4 | 2.7 | 3.0 | 2.3 | 2.1 | -50.4 | SSS |
44017 | Oakville | 3.4 | 2.1 | 3.4 | 2.7 | 1.8 | 1.7 | 1.8 | 1.8 | 1.3 | 1.6 | -26.3 | SSS |
44029 | Milton | 4.8 | 2.8 | 3.1 | 3.5 | 4.2 | 2.3 | 3.6 | 3.6 | 2.7 | 2.6 | -7.4 | SSS |
45027 | Oshawa | 2.1 | 1.5 | 2.0 | 2.3 | 2.5 | 2.4 | 0.9 | 0.9 | 0.9 | 0.7 | -43.2 | SSS |
46090 | Brampton | 4.4 | 4.6 | 4.0 | 3.8 | 3.4 | 2.2 | 2.2 | 2.2 | 1.4 | 1.5 | -49.3 | SSS |
46108 | Mississauga | 3.8 | 3.1 | 2.9 | 3.1 | 3.6 | 2.0 | 1.6 | 2.6 | 1.4 | 1.6 | -36.8 | SSS |
47045 | Barrie | 3.2 | 3.2 | 3.7 | 3.5 | 3.7 | 2.6 | 1.8 | 2.2 | 1.4 | 1.4 | -69.1 | SSS |
48006 | Newmarket | 2.0 | 1.5 | 1.4 | 1.7 | 1.6 | 1.4 | 1.3 | 1.3 | 0.8 | 0.9 | -42.9 | SSS |
49005 | Parry Sound | 0.5 | 0.5 | 0.6 | 0.8 | 0.6 | 0.5 | 0.5 | 0.7 | 0.4 | 0.5 | 0.0 | Non-SSS |
51001 | Ottawa Downtown | 2.4 | 2.1 | 1.9 | 2.0 | 1.7 | 1.5 | 1.7 | 1.6 | 1.4 | 1.5 | -16.2 | SSS |
52023 | Kingston | 0.4 | 0.2 | 0.8 | 0.9 | 0.7 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 32.9 | SSS |
54012 | Belleville | 1.6 | 1.7 | 1.2 | 1.5 | 1.8 | 1.1 | 1.0 | 1.3 | 1.4 | 1.3 | -7.6 | Non-SSS |
56051 | Cornwall | 2.2 | 1.9 | 1.5 | 1.8 | 2.1 | 1.2 | 1.4 | 1.5 | 1.2 | 1.4 | -8.1 | SSS |
59006 | Peterborough | 1.8 | 1.7 | 1.8 | 1.5 | 1.3 | 1.2 | 0.9 | 1.2 | 1.0 | 0.8 | -51.1 | SSS |
63203 | Thunder Bay | 5.1 | 4.7 | 4.2 | 5.2 | 3.8 | 4.1 | 3.8 | 3.8 | 3.4 | 3.5 | -20.7 | SSS |
71078 | Sault Ste. Marie | 1.7 | 1.3 | 2.0 | 1.7 | 1.0 | 1.3 | 1.2 | 1.5 | 1.6 | 1.4 | -16.3 | SSS |
75010 | North Bay | 2.9 | 2.5 | 2.6 | 2.1 | 2.0 | 1.6 | 1.7 | 1.8 | 1.4 | 1.5 | -41.9 | SSS |
77233 | Sudbury | N/A | 2.9 | 3.3 | 2.9 | 3.3 | 2.5 | 2.3 | 2.8 | 2.4 | 1.9 | -12.8 | SSS |
Notes:
- N/A indicates data not available.
- INS indicates there was insufficient data to calculate a valid annual mean.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for nitrogen dioxide (NO2)
Annual mean (ppb)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 13.2 | 12.4 | 14.0 | 12.7 | 11.4 | 11.1 | 11.0 | 10.9 | 9.0 | 9.6 | -28.6 | SSS |
12016 | Windsor West | 11.4 | 11.5 | 11.8 | 11.4 | 10.6 | 9.9 | 8.8 | 10.0 | 8.1 | 8.4 | -33.3 | SSS |
13001 | Chatham | 5.7 | 6.0 | 6.8 | 6.8 | 5.4 | 6.1 | 5.1 | 5.8 | 5.1 | 5.1 | -19.5 | SSS |
14111 | Sarnia | 8.6 | 8.1 | 9.0 | 9.3 | INS | 7.3 | 7.6 | 6.8 | 5.9 | 6.8 | -25.0 | SSS |
15020 | Grand Bend | 3.6 | 4.4 | 3.1 | 3.4 | 2.8 | 3.0 | 3.3 | 2.5 | 2.3 | 2.4 | -37.7 | SSS |
15026 | London | 6.3 | 6.4 | 6.9 | 6.6 | 5.4 | 5.8 | 5.4 | 5.8 | 4.5 | 5.2 | -27.8 | SSS |
21005 | Brantford | 5.4 | 4.8 | 5.5 | 5.5 | 4.8 | 4.4 | 5.2 | 5.6 | 4.3 | 4.6 | -10.9 | SSS |
26060 | Kitchener | 7.1 | 6.7 | 7.0 | 6.8 | 6.2 | 5.8 | 5.8 | 6.3 | 4.9 | 4.8 | -27.1 | SSS |
27067 | St. Catharines | 8.1 | 7.7 | 7.3 | 7.3 | 6.6 | 6.6 | 6.0 | 6.0 | 5.3 | 5.8 | -32.0 | SSS |
28028 | Guelph | 6.5 | 6.6 | 7.1 | 6.3 | 6.2 | 5.9 | 5.9 | 5.4 | 4.9 | 5.5 | -25.5 | SSS |
29000 | Hamilton Downtown | 11.9 | 12.4 | 12.4 | 12.2 | 11.9 | 11.9 | 11.6 | 12.5 | 9.9 | 10.2 | -17.2 | SSS |
29118 | Hamilton West | 12.1 | 12.7 | 12.8 | 12.2 | 11.8 | 10.4 | 11.0 | 11.3 | 9.5 | 10.1 | -25.1 | SSS |
29214 | Hamilton Mountain | 8.6 | 9.0 | 9.3 | 9.0 | 7.9 | 7.8 | 7.8 | 8.8 | 6.9 | 6.3 | -27.0 | SSS |
33003 | Toronto East | 14.0 | 13.6 | 14.2 | 13.9 | 12.1 | 11.5 | 10.6 | 10.2 | 8.4 | 9.5 | -41.6 | SSS |
34021 | Toronto North | 13.4 | 12.9 | 13.4 | 12.9 | 12.0 | 10.5 | 10.4 | 10.5 | 8.9 | 9.3 | -36.5 | SSS |
35125 | Toronto West | 16.3 | 16.1 | 17.1 | 16.6 | 15.7 | 15.0 | 14.4 | 14.6 | 12.1 | 12.9 | -26.7 | SSS |
44008 | Burlington | 11.0 | 11.0 | 10.9 | 10.4 | 10.2 | 9.7 | 9.4 | 9.6 | 8.2 | 8.7 | -24.4 | SSS |
44017 | Oakville | 9.1 | 9.2 | 8.2 | 7.5 | 8.2 | 8.2 | 8.5 | 9.1 | 6.8 | 7.3 | -17.7 | SSS |
44029 | Milton | 10.4 | 8.5 | 8.4 | 9.4 | 9.3 | 7.7 | 9.8 | 8.9 | 7.6 | 8.2 | -11.2 | SSS |
45027 | Oshawa | 5.6 | 5.9 | 6.8 | 6.6 | 6.3 | 6.4 | 3.8 | 3.5 | 3.6 | 3.4 | -50.2 | SSS |
46090 | Brampton | 10.4 | 9.1 | 10.6 | 9.9 | 9.7 | 8.3 | 8.1 | 8.6 | 6.8 | 6.5 | -35.0 | SSS |
46108 | Mississauga | 9.6 | 9.5 | 9.2 | 9.2 | 8.6 | 8.0 | 7.2 | 8.4 | 6.7 | 7.0 | -29.9 | SSS |
47045 | Barrie | 8.1 | 7.8 | 8.1 | 7.4 | 8.1 | 7.3 | 6.4 | 6.3 | 5.6 | 5.6 | -31.2 | SSS |
48006 | Newmarket | 7.2 | 6.8 | 6.8 | 6.8 | 6.5 | 6.3 | 6.1 | 5.5 | 4.5 | 4.5 | -37.7 | SSS |
49005 | Parry Sound | 3.3 | 2.9 | 3.3 | 3.2 | 2.9 | 2.7 | 2.9 | 2.6 | 2.4 | 2.5 | -25.3 | SSS |
51001 | Ottawa Downtown | 7.8 | 7.9 | 7.4 | 7.4 | 6.9 | 7.1 | 7.3 | 6.7 | 5.9 | 5.7 | -24.9 | SSS |
52023 | Kingston | 4.0 | 3.6 | 3.9 | 4.4 | 4.4 | 4.4 | 4.2 | 4.0 | 3.5 | 3.8 | -11.2 | SSS |
54012 | Belleville | 4.7 | 4.7 | 4.5 | 4.8 | 5.1 | 4.3 | 3.7 | 4.2 | 3.5 | 3.8 | -20.6 | SSS |
56051 | Cornwall | 6.1 | 6.2 | 5.6 | 5.3 | 5.5 | 5.0 | 5.1 | 5.0 | 4.6 | 4.8 | -15.1 | SSS |
59006 | Peterborough | 3.7 | 5.0 | 5.3 | 5.1 | 4.5 | 4.7 | 4.5 | 3.9 | 4.1 | 4.1 | -32.6 | SSS |
63203 | Thunder Bay | 7.3 | 7.3 | 7.8 | 7.5 | 7.1 | 6.7 | 7.5 | 6.7 | 6.1 | 6.5 | -15.5 | SSS |
71078 | Sault Ste. Marie | 4.8 | 5.0 | 5.3 | 4.8 | 4.0 | 4.4 | 4.4 | 4.5 | 3.7 | 4.0 | -25.0 | SSS |
75010 | North Bay | 6.1 | 5.8 | 5.6 | 5.6 | 4.7 | 4.6 | 4.9 | 5.1 | 4.3 | 3.9 | -26.5 | SSS |
77233 | Sudbury | N/A | 7.2 | 7.3 | 7.2 | 7.0 | 6.8 | 6.5 | 6.9 | 6.3 | 5.6 | -8.2 | SSS |
Notes:
- N/A indicates data not available.
- INS indicates there was insufficient data to calculate a valid annual mean.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- SSS - Significant Sen's Slope (significant trend detected).
10-year trend for nitrogen oxides (NOx)
Annual mean (ppb)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 17.8 | 16.2 | 18.0 | 16.2 | 14.5 | 14.4 | 14.2 | 13.6 | 10.7 | 12.1 | -29.5 | SSS |
12016 | Windsor West | 16.0 | 15.2 | 15.7 | 15.5 | 13.5 | 12.5 | 11.3 | 13.0 | 9.9 | 10.7 | -34.2 | SSS |
13001 | Chatham | 7.5 | 7.7 | 8.2 | 8.5 | 6.8 | 8.0 | 6.9 | 7.2 | 6.6 | 6.3 | -17.4 | SSS |
14111 | Sarnia | 10.7 | 9.8 | 10.9 | 11.7 | INS | 8.7 | 9.4 | 8.5 | 7.5 | 8.7 | -20.5 | SSS |
15020 | Grand Bend | 3.9 | 5.4 | 3.4 | 3.8 | 3.3 | 3.4 | 3.4 | 2.7 | 2.7 | 2.8 | -34.0 | SSS |
15026 | London | 10.5 | 7.8 | 8.3 | 8.0 | 6.5 | 6.8 | 6.2 | 6.6 | 5.2 | 6.1 | -31.0 | SSS |
21005 | Brantford | 6.7 | 5.7 | 6.4 | 6.8 | 5.7 | 5.3 | 6.2 | 6.5 | 5.1 | 5.3 | -11.8 | SSS |
26060 | Kitchener | 9.2 | 8.3 | 8.5 | 8.4 | 7.5 | 6.9 | 6.7 | 7.4 | 5.5 | 5.7 | -26.3 | SSS |
27067 | St. Catharines | 10.6 | 9.9 | 9.1 | 9.4 | 8.2 | 7.9 | 6.8 | 7.1 | 6.2 | 6.8 | -34.8 | SSS |
28028 | Guleph | 8.8 | 7.8 | 8.4 | 7.7 | 7.3 | 7.0 | 7.1 | 6.4 | 5.6 | 6.5 | -26.4 | SSS |
29000 | Hamilton Downtown | 16.6 | 16.8 | 16.3 | 7.7 | 16.1 | 15.8 | 15.5 | 16.5 | 12.8 | 13.7 | -18.3 | SSS |
29118 | Hamilton West | 18.4 | 18.1 | 18.7 | 17.3 | 17.9 | 14.2 | 15.2 | 16.5 | 12.6 | 13.2 | -33.2 | SSS |
29214 | Hamilton Mountain | 10.5 | 11.0 | 11.3 | 10.9 | 9.2 | 9.1 | 8.9 | 15.4 | 8.3 | 7.7 | -27.0 | SSS |
33003 | Toronto East | 20.6 | 19.4 | 20.4 | 19.7 | 17.5 | 15.8 | 13.7 | 13.7 | 10.7 | 11.9 | -49.6 | SSS |
34021 | Toronto North | 18.5 | 17.0 | 17.7 | 16.9 | 15.4 | 13.5 | 12.8 | 13.2 | 11.0 | 12.1 | -40.2 | SSS |
35125 | Toronto West | 27.6 | 24.7 | 26.5 | 25.7 | 23.8 | 22.7 | 21.1 | 22.1 | 17.2 | 18.9 | -32.8 | SSS |
44008 | Burlington | 15.6 | 15.6 | 15.5 | 14.3 | 14.2 | 13.2 | 12.0 | 12.6 | 10.5 | 10.7 | -32.6 | SSS |
44017 | Oakville | 12.6 | 11.2 | 11.6 | 10.1 | 10.1 | 9.9 | 10.4 | 10.9 | 8.0 | 8.8 | -24.4 | SSS |
44029 | Milton | 15.3 | 11.8 | 12.0 | 13.2 | 13.5 | 10.0 | 13.4 | 12.5 | 10.3 | 10.8 | -13.0 | SSS |
45027 | Oshawa | 7.8 | 7.4 | 8.8 | 8.9 | 8.8 | 8.8 | 4.7 | 4.4 | 4.5 | 4.1 | -48.8 | SSS |
46090 | Brampton | 14.8 | 13.9 | 14.6 | 13.7 | 13.1 | 10.6 | 10.3 | 10.74 | 8.1 | 8.0 | -44.1 | SSS |
46108 | Mississauga | 13.4 | 12.6 | 12.1 | 12.3 | 12.2 | 9.9 | 8.8 | 10.97 | 8.0 | 8.6 | -33.6 | SSS |
47045 | Barrie | 11.3 | 11.0 | 11.8 | 10.9 | 11.9 | 9.9 | 8.3 | 8.52 | 6.9 | 7.0 | -42.4 | SSS |
48006 | Newmarket | 9.2 | 8.4 | 8.2 | 8.5 | 8.1 | 7.8 | 7.4 | 6.78 | 5.2 | 5.4 | -37.2 | SSS |
49005 | Parry Sound | 3.8 | 3.4 | 4.0 | 4.0 | 3.6 | 3.3 | 3.3 | 3.34 | 2.8 | 3.1 | -23.4 | SSS |
51001 | Ottawa Downtown | 10.2 | 10.1 | 9.3 | 9.5 | 8.6 | 8.6 | 9.0 | 8.31 | 7.3 | 7.2 | -24.4 | SSS |
52023 | Kingston | 4.6 | 3.8 | 4.8 | 5.3 | 5.2 | 4.9 | 4.7 | 4.55 | 4.1 | 4.5 | -10.8 | SSS |
54012 | Belleville | 6.4 | 6.3 | 5.7 | 6.2 | 6.7 | 5.4 | 4.7 | 5.53 | 4.9 | 5.1 | -18.9 | SSS |
56051 | Cornwall | 8.4 | 8.0 | 7.0 | 7.1 | 7.6 | 6.2 | 6.3 | 6.54 | 5.8 | 6.2 | -14.9 | SSS |
59006 | Peterborough | 5.4 | 6.6 | 7.1 | 6.6 | 5.9 | 5.8 | 5.3 | 5.14 | 5.0 | 4.8 | -36.5 | SSS |
63203 | Thunder Bay | 12.4 | 12.0 | 11.9 | 12.7 | 11 | 10.8 | 11.3 | 10.44 | 9.5 | 10.0 | -18.7 | SSS |
71078 | Sault Ste. Marie | 6.4 | 6.3 | 7.3 | 6.6 | 5.1 | 5.8 | 5.6 | 5.95 | 5.2 | 5.3 | -22.9 | SSS |
75010 | North Bay | 9.1 | 8.3 | 8.1 | 7.8 | 6.7 | 6.2 | 6.6 | 6.91 | 5.6 | 5.4 | -31.6 | SSS |
77233 | Sudbury | N/A | 10.1 | 10.6 | 10.2 | 10.2 | 9.4 | 8.8 | 9.7 | 8.7 | 7.5 | -12.1 | SSS |
Notes:
- N/A indicates data not available.
- INS indicates there was insufficient data to calculate a valid annual mean.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- SSS - Significant Sen's Slope (significant trend detected).
10-year trend for fine particulate matter (PM2.5)
Annual mean (µg/m3)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 9.8 | 9.2 | 10.1 | 9.3 | 8.1 | 7.8 | 8.5 | 7.8 | 7.1 | 8.3 | -22.5 | SSS |
12016 | Windsor West | 9.5 | 10.0 | 10.7 | 9.9 | 8.5 | 8.5 | 8.7 | 9.1 | 8.8 | 9.6 | -8.8 | SSS |
13001 | Chatham | 7.5 | 8.1 | 8.6 | 8.1 | 6.6 | 6.4 | 6.8 | 6.8 | 6.7 | 7.1 | -16.1 | SSS |
14111 | Sarnia | 12.7 | 8.5 | 9.0 | 8.4 | INS | 7.0 | 7.4 | 7.1 | 7.1 | 7.7 | -32.1 | SSS |
15020 | Grand Bend | 7.4 | 7.3 | 8.1 | 7.7 | 6.0 | 5.1 | 5.6 | 5.4 | 4.8 | 5.7 | -35.3 | SSS |
15026 | London | 8.1 | 9.1 | 8.8 | 8.3 | 7.1 | 7.0 | 7.3 | 6.7 | 6.5 | 7.8 | -22.7 | SSS |
16015 | Port Stanley | 7.4 | 7.4 | 8.2 | 8.0 | 6.5 | 6.3 | 6.8 | 6.7 | 6.5 | 7.0 | -16.2 | SSS |
18007 | Tiverton | 6.0 | 5.8 | 6.5 | 6.4 | 5.1 | 5.1 | 5.7 | 5.0 | 4.8 | 5.4 | -18.2 | SSS |
21005 | Brantford | 7.8 | 8.5 | 9.2 | 8.7 | 7.3 | 7.2 | 7.7 | 7.4 | 6.7 | 7.7 | -17.1 | SSS |
26060 | Kitchener | 7.7 | 8.7 | 9.3 | 8.8 | 7.3 | 7.0 | 7.4 | 7.2 | 6.6 | 7.8 | -19.6 | SSS |
27067 | St. Catharines | 7.9 | 8.5 | 8.8 | 8.4 | 6.9 | 7.0 | 7.0 | 7.0 | 6.3 | 6.5 | -25.6 | SSS |
28028 | Guelph | 7.4 | 8.1 | 8.9 | 8.4 | 6.9 | 6.8 | 7.4 | 7.1 | 6.9 | 7.7 | -11.4 | SSS |
29000 | Hamilton Downtown | 10.2 | 10.1 | 10.8 | 10.2 | 8.2 | 8.5 | 9.2 | 8.8 | 8.1 | 8.9 | -20.9 | SSS |
29118 | Hamilton West | 9.0 | 9.6 | 9.9 | 9.9 | 7.9 | 7.5 | 8.2 | 7.8 | 7.8 | 8.0 | -18.6 | SSS |
29214 | Hamilton Mountain | 8.1 | 9.2 | 9.4 | 9.0 | 7.2 | 7.4 | 7.7 | 7.9 | 7.1 | 8.0 | -20.0 | SSS |
33003 | Toronto East | 7.8 | 8.2 | 8.9 | 8.5 | 7.0 | 7.4 | 7.2 | 7.0 | 6.7 | 7.4 | -16.1 | SSS |
34021 | Toronto North | 9.0 | 8.3 | 9.2 | 9.4 | 7.3 | 7.4 | 7.6 | 6.8 | 6.4 | 7.4 | -27.2 | SSS |
35125 | Toronto West | 8.8 | 8.8 | 9.1 | 8.5 | 7.0 | 7.4 | 7.7 | 7.2 | 6.9 | 7.7 | -21.2 | SSS |
44008 | Burlington | 8.0 | 8.7 | 9.6 | 9.4 | 7.6 | 7.0 | 7.2 | 7.0 | 6.4 | 7.2 | -27.4 | SSS |
44017 | Oakville | 7.6 | 8.0 | 8.5 | 8.3 | 7.0 | 6.9 | 7.4 | 7.2 | 6.3 | 7.1 | -17.3 | SSS |
44029 | Milton | 7.9 | 8.5 | 10.3 | 8.8 | 7.1 | 7.0 | 7.5 | 7.5 | 7.1 | 7.6 | -16.3 | SSS |
45027 | Oshawa | 6.9 | 7.4 | 7.7 | 7.5 | 5.9 | 5.9 | 6.4 | 6.1 | 6.2 | 6.2 | -19.4 | SSS |
46090 | Brampton | 7.2 | 8.5 | 8.9 | 8.4 | 6.8 | 7.0 | 7.3 | 6.8 | 6.7 | 7.2 | -16.5 | SSS |
46108 | Mississauga | 7.5 | 7.9 | 8.7 | 8.5 | 7.2 | 6.8 | 7.3 | 7.0 | 6.6 | 7.6 | -15.1 | SSS |
47045 | Barrie | 7.1 | 7.5 | 7.6 | 7.6 | 6.5 | 7.0 | 7.7 | 7.5 | 6.8 | 6.9 | -5.9 | Non-SSS |
48006 | Newmarket | 7.1 | 7.3 | 7.3 | 7.1 | 6.0 | 5.9 | 6.4 | 5.9 | 5.9 | 6.5 | -18.4 | SSS |
49005 | Parry Sound | 6.0 | 5.8 | 5.8 | 5.7 | 4.8 | 4.6 | 5.0 | 4.4 | 4.4 | 5.0 | -31.0 | SSS |
49010 | Dorset | 5.3 | 5.4 | 5.3 | 5.6 | 4.6 | 4.6 | 4.9 | 4.1 | 4.5 | 4.7 | -16.8 | SSS |
51001 | Ottawa Downtown | 6.2 | 7.0 | 7.0 | 6.9 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.3 | -13.5 | SSS |
51010 | Petawawa | 4.8 | 4.8 | 4.7 | 4.8 | 4.4 | 4.1 | 3.6 | 3.8 | 4.2 | 4.3 | -23.1 | SSS |
52023 | Kingston | 8.3 | 6.5 | 6.8 | 6.3 | 5.8 | 5.3 | 5.6 | 5.4 | 5.6 | 6.5 | -20.1 | SSS |
54012 | Belleville | 6.5 | 6.9 | 6.8 | 6.6 | 5.5 | 5.8 | 6.4 | 6.1 | 6.3 | 6.0 | -9.9 | Non-SSS |
56051 | Cornwall | 6.9 | 7.7 | 7.0 | 6.9 | 6.4 | 5.9 | 6.3 | 5.9 | 6.0 | 6.5 | -18.7 | SSS |
59006 | Peterborough | 6.3 | 7.4 | 6.9 | 6.8 | 5.8 | 5.8 | 6.3 | 6.0 | 5.6 | 6.5 | -17.3 | SSS |
63203 | Thunder Bay | 5.4 | 6.3 | 6.6 | 6.5 | 4.9 | 5.1 | 6.0 | 5.1 | 5.5 | 6.6 | -10.4 | Non-SSS |
71078 | Sault Ste. Marie | 5.6 | 5.6 | 6.0 | 5.9 | 4.9 | 5.0 | 5.5 | 4.8 | 4.5 | 5.8 | -17.3 | SSS |
75010 | North Bay | 5.3 | 5.2 | 5.3 | 5.3 | 4.6 | 4.6 | 5.5 | 4.5 | 4.6 | 5.7 | -7.8 | Non-SSS |
77233 | Sudbury | 5.1 | 5.7 | 6.0 | 6.3 | 5.4 | 5.0 | 5.4 | 5.0 | 5.1 | 5.8 | -9.8 | SSS |
Notes:
- From 2011-2012, measurements were taken by TEOM sampler operated at 30°C with a Sample Equilibration System (SES).
- As of 2013, measurements taken by Synchronized Hybrid Ambient Real-time Particulate (SHARP) 5030.
- An approximate correction factor was applied to the TEOM data prior to 2013 to be comparable to SHARP measurements and generate an approximate 10-year trend.
- INS indicates there was insufficient data in any one quarter to calculate a valid annual mean.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- Station 77233 replaced station 77219 as the Sudbury site in 2013.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for ground-level ozone (O3) 1h maximum
1h Maximum (ppb)
O3 1h AAQC: 80 ppb
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 128 | 89 | 78 | 89 | 95 | 78 | 89 | 82 | 81 | 82 | -8.2 | Non-SSS |
12016 | Windsor West | 128 | 87 | 86 | 87 | 95 | 82 | 90 | 80 | 83 | 86 | -8.2 | Non-SSS |
13001 | Chatham | 104 | 85 | 78 | 79 | 84 | 90 | 78 | 76 | 77 | 75 | -12.1 | SSS |
14111 | Sarnia | 101 | 83 | 79 | 83 | 83 | 80 | 101 | 87 | 82 | 97 | 0.0 | Non-SSS |
15020 | Grand Bend | 124 | 86 | 90 | 87 | 91 | 82 | 100 | 85 | 93 | 104 | 3.6 | Non-SSS |
15026 | London | 88 | 82 | 82 | 77 | 82 | 78 | 76 | 70 | 77 | 78 | -12.3 | SSS |
16015 | Port Stanley | 104 | 85 | 87 | 86 | 84 | 90 | 86 | 77 | 76 | 74 | -17.3 | SSS |
18007 | Tiverton | 93 | 92 | 86 | 83 | 85 | 82 | 104 | 81 | 75 | 78 | -16.1 | SSS |
21005 | Brantford | 88 | 74 | 80 | 79 | 84 | 74 | 76 | 74 | 74 | 79 | -10.2 | Non-SSS |
26060 | Kitchener | 89 | 72 | 76 | 76 | 81 | 75 | 75 | 77 | 74 | 81 | 0.0 | Non-SSS |
27067 | St. Catharines | 98 | 96 | 70 | 73 | 80 | 73 | 75 | 70 | 75 | 73 | -13.8 | Non-SSS |
28028 | Guelph | 94 | 73 | 79 | 79 | 82 | 76 | 78 | 74 | 70 | 83 | -9.6 | Non-SSS |
29000 | Hamilton Downtown | 88 | 86 | 74 | 74 | 78 | 73 | 77 | 65 | 77 | 80 | -7.7 | Non-SSS |
29118 | Hamilton West | 85 | 78 | 70 | 71 | 78 | 74 | 76 | 65 | 76 | 78 | -3.0 | Non-SSS |
29214 | Hamilton Mountain | 91 | 86 | 79 | 79 | 76 | 81 | 80 | 70 | 79 | 80 | -9.9 | Non-SSS |
33003 | Toronto East | 89 | 87 | 73 | 91 | 99 | 82 | 72 | 67 | 77 | 78 | -14.4 | Non-SSS |
34021 | Toronto North | 92 | 87 | 82 | 90 | 85 | 82 | 83 | 77 | 95 | 86 | -6.5 | Non-SSS |
35125 | Toronto West | 94 | 83 | 72 | 82 | 79 | 82 | 76 | 77 | 81 | 81 | -2.7 | Non-SSS |
44008 | Burlington | 91 | 92 | 73 | 84 | 80 | 88 | 83 | 74 | 86 | 80 | -8.5 | Non-SSS |
44017 | Oakville | 96 | 101 | 72 | 80 | 74 | 84 | 82 | 71 | 81 | 84 | -9.4 | Non-SSS |
44029 | Milton | 94 | 93 | 80 | 80 | 79 | 74 | 81 | 77 | 77 | 84 | -9.6 | Non-SSS |
45027 | Oshawa | 92 | 96 | 73 | 73 | 81 | 86 | 76 | 66 | 88 | 80 | -11.7 | Non-SSS |
46090 | Brampton | 92 | 84 | 80 | 84 | 79 | 75 | 83 | 72 | 83 | 84 | -4.9 | Non-SSS |
46108 | Mississauga | 81 | 83 | 76 | 79 | 79 | 78 | 79 | 65 | 80 | 81 | 0.0 | Non-SSS |
47045 | Barrie | 91 | 73 | 68 | 80 | 79 | 75 | 72 | 75 | 70 | 82 | -9.9 | Non-SSS |
48006 | Newmarket | 105 | 72 | 87 | 92 | 94 | 85 | 91 | 88 | 87 | 81 | -8.6 | Non-SSS |
49005 | Parry Sound | 94 | 77 | 74 | 86 | 74 | 74 | 80 | 68 | 73 | 80 | -9.6 | Non-SSS |
49010 | Dorset | 82 | 69 | 79 | 78 | 74 | 69 | 77 | 64 | 66 | 70 | -14.6 | SSS |
51001 | Ottawa Downtown | 76 | 67 | 64 | 69 | 73 | 71 | 72 | 57 | 64 | 68 | -8.9 | Non-SSS |
51010 | Petawawa | 77 | 69 | 68 | 70 | 68 | 65 | 66 | 58 | 63 | 66 | -11.7 | SSS |
52023 | Kingston | 92 | 79 | 81 | 74 | 82 | 94 | 78 | 68 | 72 | 78 | -14.7 | Non-SSS |
54012 | Belleville | 87 | 92 | 80 | 77 | 96 | 86 | 85 | 73 | 81 | 82 | -10.3 | Non-SSS |
56051 | Cornwall | 76 | 73 | 70 | 69 | 74 | 72 | 68 | 58 | 62 | 70 | -15.8 | SSS |
59006 | Peterborough | 90 | 74 | 74 | 78 | 85 | 80 | 86 | 68 | 87 | 85 | 5.0 | Non-SSS |
63203 | Thunder Bay | 74 | 63 | 70 | 62 | 62 | 51 | 63 | 56 | 56 | 65 | -14.6 | Non-SSS |
71078 | Sault Ste. Marie | 82 | 66 | 73 | 75 | 80 | 70 | 69 | 61 | 77 | 66 | -11.0 | Non-SSS |
75010 | North Bay | 82 | 72 | 71 | 70 | 78 | 69 | 63 | 63 | 74 | 71 | -11.0 | Non-SSS |
77233 | Sudbury | 84 | 76 | 73 | 67 | 80 | 69 | 70 | 75 | 62 | 56 | -25.0 | SSS |
Notes:
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- Station 77233 replaced station 77219 as the Sudbury site in 2013.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for ground-level ozone (O3)
Annual mean (ppb)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 28.0 | 26.9 | 26.0 | 27.0 | 27.7 | 27.3 | 26.9 | 26.6 | 27.3 | 28.8 | 4.6 | SSS |
12016 | Windsor West | 28.0 | 26.7 | 27.2 | 26.5 | 27.7 | 27.0 | 27.0 | 27.3 | 26.0 | 29.4 | 4.5 | SSS |
13001 | Chatham | 29.5 | 29.6 | 29.3 | 29.6 | 29.6 | 29.5 | 28.7 | 29.2 | 29.1 | 30.4 | 0.4 | Non-SSS |
14111 | Sarnia | 29.7 | 28.6 | 27.1 | 27.8 | 28.8 | 28.4 | 29.0 | 29.2 | 26.7 | 30.2 | 0.5 | Non-SSS |
15020 | Grand Bend | 33.2 | 32.3 | 31.0 | 30.4 | 30.7 | 31.0 | 31.5 | 31.6 | 30.9 | 32.0 | -0.9 | Non-SSS |
15026 | London | 27.7 | 28.7 | 28.1 | 27.9 | 28.2 | 28.1 | 27.6 | 26.8 | 27.7 | 28.9 | 0.8 | Non-SSS |
16015 | Port Stanley | 33.1 | 33.9 | 32.3 | 32.8 | 32.9 | 33.0 | 32.3 | 32.3 | 30.9 | 31.4 | -6.0 | SSS |
18007 | Tiverton | 32.0 | 32.4 | 31.8 | 32.5 | 33.1 | 32.4 | 32.3 | 31.1 | 30.5 | 32.4 | -2.0 | Non-SSS |
21005 | Brantford | 28.8 | 29.0 | 29.4 | 28.9 | 29.5 | 28.3 | 28.3 | 27.5 | 28.0 | 28.5 | -4.6 | SSS |
26060 | Kitchener | 28.0 | 28.0 | 27.3 | 27.9 | 28.8 | 28.1 | 27.7 | 27.2 | 27.7 | 28.4 | -0.4 | Non-SSS |
27067 | St. Catharines | 28.7 | 28.6 | 28.5 | 28.6 | 29.8 | 28.1 | 28.5 | 28.4 | 30.2 | 29.8 | 4.0 | SSS |
28028 | Guelph | 28.8 | 29.0 | 27.8 | 27.7 | 28.7 | 28.4 | 28.9 | 26.3 | 27.0 | 29.5 | -0.8 | Non-SSS |
29000 | Hamilton Downtown | 25.7 | 25.0 | 25.3 | 25.9 | 26.7 | 25.6 | 25.6 | 24.4 | 26.3 | 26.4 | 3.9 | Non-SSS |
29118 | Hamilton West | 24.2 | 24.4 | 22.7 | 23.9 | 24.4 | 25.0 | 25.5 | 23.6 | 25.2 | 24.9 | 5.4 | SSS |
29214 | Hamilton Mountain | 30.2 | 29.5 | 29.1 | 29.4 | 29.5 | 29.1 | 29.3 | 27.5 | 29.3 | 28.7 | -3.4 | Non-SSS |
33003 | Toronto East | 24.6 | 24.1 | 23.4 | 23.5 | 25.5 | 24.4 | 25.2 | 24.6 | 26.1 | 26.2 | 9.6 | SSS |
34021 | Toronto North | 25.7 | 25.3 | 25.3 | 25.7 | 25.9 | 24.0 | 25.5 | 24.1 | 26.0 | 26.4 | 2.5 | Non-SSS |
35125 | Toronto West | 21.5 | 21.5 | 21.1 | 21.3 | 22.1 | 22.1 | 22.3 | 21.8 | 23.4 | 22.8 | 9.6 | SSS |
44008 | Burlington | 26.7 | 26.4 | 25.5 | 26.5 | 27.6 | 27.1 | 27.6 | 26.6 | 28.3 | 27.4 | 7.9 | SSS |
44017 | Oakville | 27.7 | 28.3 | 27.2 | 27.4 | 27.1 | 27.4 | 28.7 | 27.1 | 28.0 | 28.8 | 3.3 | Non-SSS |
44029 | Milton | 26.5 | 27.6 | 27.1 | 27.2 | 27.2 | 27.5 | 28.1 | 26.9 | 26.8 | 27.2 | 0.4 | Non-SSS |
45027 | Oshawa | 27.0 | 27.2 | 27.2 | 26.2 | 27.2 | 27.9 | 25.8 | 24.4 | 26.4 | 26.9 | -3.5 | SSS |
46090 | Brampton | 26.6 | 26.7 | 26.5 | 26.5 | 27.1 | 27.2 | 28.6 | 26.5 | 28.4 | 28.3 | 8.2 | SSS |
46108 | Mississauga | 25.6 | 25.2 | 25.4 | 25.4 | 26.0 | 26.2 | 26.1 | 24.5 | 25.6 | 26.2 | 1.7 | Non-SSS |
47045 | Barrie | 26.3 | 25.5 | 25.6 | 25.4 | 25.9 | 25.9 | 27.5 | 25.7 | 25.9 | 25.0 | 1.0 | Non-SSS |
48006 | Newmarket | 29.4 | 28.7 | 28.6 | 28.5 | 28.6 | 27.9 | 29.8 | 27.8 | 28.5 | 30.2 | 3.6 | Non-SSS |
49005 | Parry Sound | 30.1 | 30.4 | 29.6 | 30.4 | 29.6 | 29.7 | 30.8 | 29.8 | 29.9 | 30.3 | 1.9 | Non-SSS |
49010 | Dorset | 28.0 | 28.1 | 27.7 | 27.0 | 27.4 | 26.9 | 28.2 | 27.5 | 27.1 | 26.8 | -2.1 | Non-SSS |
51001 | Ottawa Downtown | 26.0 | 25.6 | 24.8 | 25.6 | 25.6 | 25.5 | 26.4 | 25.9 | 25.2 | 25.8 | 1.0 | Non-SSS |
51010 | Petawawa | 27.7 | 27.6 | 26.8 | 26.7 | 26.4 | 25.8 | 27.3 | 27.3 | 26.9 | 26.7 | -0.4 | Non-SSS |
52023 | Kingston | 32.7 | 30.3 | 31.4 | 30.3 | 30.5 | 30.4 | 30.5 | 29.9 | 30.1 | 30.2 | -4.6 | SSS |
54012 | Belleville | 28.0 | 29.2 | 29.6 | 29.6 | 30.5 | 30.2 | 29.9 | 29.6 | 29.7 | 30.3 | 6.4 | SSS |
56051 | Cornwall | 27.1 | 26.9 | 27.3 | 27.9 | 27.1 | 27.2 | 27.6 | 26.9 | 26.4 | 26.7 | -3.2 | Non-SSS |
59006 | Peterborough | 29.1 | 28.6 | 29.2 | 29.3 | 29.7 | 28.9 | 29.7 | 28.3 | 27.6 | 28.6 | -1.9 | Non-SSS |
63203 | Thunder Bay | 25.0 | 26.3 | 23.4 | 24.0 | 23.2 | 23.4 | 24.3 | 23.7 | 22.9 | 24.4 | -4.7 | SSS |
71078 | Sault Ste. Marie | 28.8 | 28.9 | 28.4 | 27.8 | 27.3 | 28.1 | 29.7 | 28.1 | 28.2 | 29.2 | 1.4 | Non-SSS |
75010 | North Bay | 26.1 | 27.4 | 26.7 | 27.0 | 26.4 | 26.4 | 26.0 | 26.4 | 26.2 | 26.4 | -0.8 | Non-SSS |
77233 | Sudbury | 28.5 | 27.2 | 26.3 | 25.7 | 25.1 | 25.9 | 27.1 | 26.3 | 24.8 | 23.9 | -9.7 | SSS |
Notes:
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- Station 77233 replaced station 77219 as the Sudbury site in 2013.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for ground-level ozone (O3) summer means (May - September)
Summer mean (ppb)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 36.8 | 32.5 | 30.9 | 33.3 | 33.4 | 32.8 | 33.7 | 31.4 | 32.7 | 33.8 | 0.8 | Non-SSS |
12016 | Windsor West | 35.7 | 30.9 | 30.9 | 31.8 | 33.0 | 31.8 | 32.4 | 31.2 | 30.6 | 33.8 | -1.1 | Non-SSS |
13001 | Chatham | 36.6 | 34.2 | 32.4 | 34.4 | 32.9 | 33.1 | 32.1 | 31.9 | 32.5 | 33.6 | -6.8 | Non-SSS |
14111 | Sarnia | 36.6 | 32.0 | 29.4 | 31.1 | 32.1 | 32.0 | 34.0 | 31.5 | 30.1 | 35.1 | -0.4 | Non-SSS |
15020 | Grand Bend | 38.9 | 33.1 | 31.5 | 32.3 | 32.0 | 32.1 | 32.7 | 31.7 | 31.7 | 33.1 | -2.7 | Non-SSS |
15026 | London | 34.4 | 30.9 | 29.5 | 31.0 | 30.4 | 29.8 | 30.5 | 27.4 | 29.1 | 31.0 | -7.7 | Non-SSS |
16015 | Port Stanley | 38.4 | 36.9 | 33.7 | 35.6 | 35.2 | 35.0 | 35.3 | 33.7 | 32.8 | 34.3 | -10.8 | SSS |
18007 | Tiverton | 36.0 | 32.5 | 30.8 | 33.3 | 34.1 | 32.2 | 32.9 | 29.7 | 30.5 | 33.0 | -7.3 | Non-SSS |
21005 | Brantford | 33.5 | 30.1 | 29.9 | 31.2 | 32.2 | 29.4 | 30.4 | 28.3 | 29.5 | 31.1 | -6.4 | Non-SSS |
26060 | Kitchener | 33.5 | 29.8 | 28.5 | 30.2 | 31.8 | 29.8 | 30.6 | 29.2 | 29.6 | 30.6 | -1.6 | Non-SSS |
27067 | St. Catharines | 35.0 | 31.2 | 29.5 | 31.7 | 33.2 | 29.8 | 31.3 | 29.7 | 32.6 | 32.9 | 0.4 | Non-SSS |
28028 | Guelph | 34.5 | 30.4 | 28.9 | 30.2 | 31.2 | 29.6 | 31.7 | 27.3 | 29.0 | 31.1 | -5.1 | Non-SSS |
29000 | Hamilton Downtown | 32.4 | 28.4 | 27.5 | 29.5 | 30.6 | 27.8 | 29.7 | 26.1 | 29.4 | 30.1 | -2.4 | Non-SSS |
29118 | Hamilton West | 29.2 | 26.4 | 22.7 | 26.5 | 27.1 | 26.8 | 28.5 | 24.4 | 27.7 | 27.9 | 5.1 | Non-SSS |
29214 | Hamilton Mountain | 37.4 | 32.5 | 31.6 | 33.9 | 33.2 | 31.5 | 34.0 | 29.6 | 32.3 | 32.3 | -6.6 | Non-SSS |
33003 | Toronto East | 30.6 | 27.1 | 25.9 | 27.7 | 29.7 | 26.0 | 29.2 | 26.0 | 28.8 | 29.2 | 0.5 | Non-SSS |
34021 | Toronto North | 32.7 | 29.4 | 28.6 | 30.7 | 30.7 | 26.3 | 30.4 | 25.9 | 29.3 | 29.8 | -5.4 | Non-SSS |
35125 | Toronto West | 27.5 | 24.4 | 23.5 | 25.0 | 25.9 | 24.3 | 26.3 | 24.3 | 25.9 | 25.9 | 0.9 | Non-SSS |
44008 | Burlington | 32.5 | 29.2 | 27.4 | 30.1 | 30.5 | 29.0 | 31.8 | 28.8 | 31.2 | 30.4 | 1.4 | Non-SSS |
44017 | Oakville | 34.2 | 30.6 | 28.3 | 30.2 | 29.9 | 29.5 | 32.4 | 28.8 | 30.4 | 32.1 | -2.5 | Non-SSS |
44029 | Milton | 32.2 | 30.6 | 28.2 | 30.4 | 30.6 | 29.6 | 34.3 | 28.9 | 28.6 | 30.6 | -7.0 | Non-SSS |
45027 | Oshawa | 31.1 | 28.3 | 27.9 | 28.9 | 29.4 | 28.6 | 26.6 | 24.4 | 27.4 | 27.4 | -11.1 | SSS |
46090 | Brampton | 32.7 | 29.5 | 28.9 | 30.3 | 31.2 | 29.5 | 32.7 | 28.2 | 31.0 | 31.6 | 1.8 | Non-SSS |
46108 | Mississauga | 30.4 | 26.5 | 26.5 | 28.0 | 28.5 | 27.2 | 28.3 | 24.9 | 27.0 | 28.5 | -0.1 | Non-SSS |
47045 | Barrie | 29.7 | 25.6 | 25.4 | 26.8 | 27.4 | 25.6 | 29.0 | 24.7 | 25.8 | 25.1 | -4.2 | Non-SSS |
48006 | Newmarket | 34.2 | 30.3 | 29.4 | 31.2 | 31.7 | 29.0 | 33.2 | 28.4 | 30.1 | 32.2 | -4.5 | Non-SSS |
49005 | Parry Sound | 32.8 | 30.1 | 28.2 | 31.4 | 28.9 | 27.7 | 30.9 | 27.8 | 28.5 | 30.0 | -6.4 | Non-SSS |
49010 | Dorset | 28.3 | 25.3 | 24.4 | 24.6 | 25.1 | 23.0 | 25.8 | 23.9 | 23.7 | 24.1 | -6.7 | Non-SSS |
51001 | Ottawa Downtown | 29.3 | 26.5 | 24.6 | 27.8 | 27.5 | 25.3 | 27.6 | 25.6 | 25.7 | 27.4 | -2.5 | Non-SSS |
51010 | Petawawa | 28.1 | 24.5 | 22.9 | 24.4 | 23.4 | 21.1 | 23.7 | 22.9 | 22.7 | 23.5 | -8.2 | SSS |
52023 | Kingston | 38.5 | 32.4 | 32.7 | 32.2 | 33.3 | 30.9 | 33.1 | 30.0 | 31.3 | 32.0 | -8.7 | Non-SSS |
54012 | Belleville | 32.7 | 30.6 | 30.4 | 33.2 | 33.7 | 30.9 | 32.4 | 30.0 | 31.0 | 32.8 | 0.2 | Non-SSS |
56051 | Cornwall | 30.7 | 28.1 | 27.0 | 29.7 | 28.7 | 27.1 | 29.4 | 26.1 | 26.3 | 27.8 | -7.6 | Non-SSS |
59006 | Peterborough | 34.2 | 29.5 | 30.0 | 31.5 | 32.3 | 29.2 | 32.2 | 28.1 | 28.4 | 29.9 | -7.2 | Non-SSS |
63203 | Thunder Bay | 25.3 | 24.7 | 22.7 | 23.6 | 22.0 | 20.4 | 22.1 | 21.8 | 21.3 | 24.4 | -16.5 | SSS |
71078 | Sault Ste. Marie | 30.3 | 28.2 | 27.4 | 28.1 | 26.3 | 26.3 | 29.1 | 26.2 | 26.4 | 28.8 | -5.2 | Non-SSS |
75010 | North Bay | 28.5 | 26.9 | 26.2 | 27.8 | 26.4 | 24.7 | 26.3 | 25.7 | 24.4 | 27.4 | -7.4 | Non-SSS |
77233 | Sudbury | 29.8 | 28.0 | 27.0 | 27.7 | 26.6 | 25.8 | 28.8 | 25.9 | 23.7 | 23.4 | -17.8 | SSS |
Notes:
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- Station 77233 replaced station 77219 as the Sudbury site in 2013.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for ground-level ozone (O3) winter means (January-April, October-December)
Winter mean (ppb)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 21.7 | 22.8 | 22.8 | 22.4 | 23.6 | 23.3 | 22.4 | 23.1 | 23.5 | 25.19 | 8.9 | SSS |
12016 | Windsor West | 22.3 | 23.4 | 24.5 | 22.7 | 23.9 | 23.6 | 23.1 | 24.4 | 22.8 | 26.32 | 6.6 | Non-SSS |
13001 | Chatham | 24.3 | 26.2 | 27.1 | 26.3 | 27.2 | 26.8 | 26.2 | 27.4 | 26.7 | 28.21 | 8.4 | SSS |
14111 | Sarnia | 24.7 | 26.2 | 25.4 | 25.4 | INS | 26.0 | 25.4 | 27.6 | 24.3 | 26.26 | 4.3 | Non-SSS |
15020 | Grand Bend | 29.1 | 31.8 | 30.6 | 29.1 | 29.8 | 30.2 | 30.7 | 31.6 | 30.5 | 31.32 | 6.3 | Non-SSS |
15026 | London | 22.9 | 26.9 | 27.1 | 25.8 | 26.6 | 26.9 | 25.6 | 26.4 | 26.7 | 27.49 | 6.1 | Non-SSS |
16015 | Port Stanley | 29.3 | 31.8 | 31.3 | 31.2 | 31.2 | 31.5 | 30.2 | 31.4 | 29.6 | 29.37 | -6.0 | Non-SSS |
18007 | Tiverton | 29.2 | 32.4 | 32.7 | 31.9 | 32.4 | 32.6 | 31.9 | 32.1 | 30.6 | 32.0 | -1.0 | Non-SSS |
21005 | Brantford | 25.4 | 28.3 | 28.8 | 27.2 | 27.7 | 27.5 | 26.7 | 26.9 | 27.0 | 26.8 | -6.0 | Non-SSS |
26060 | Kitchener | 24.0 | 26.7 | 26.5 | 26.1 | 26.6 | 27.1 | 25.6 | 25.8 | 26.4 | 26.93 | 2.3 | Non-SSS |
27067 | St. Catharines | 24.1 | 26.8 | 27.9 | 26.3 | 27.2 | 27.0 | 26.4 | 27.5 | 28.5 | 27.8 | 8.9 | SSS |
28028 | Guelph | 24.8 | 28.0 | 27.0 | 26.0 | 26.8 | 27.5 | 26.9 | 25.7 | 25.6 | 28.5 | 0.5 | Non-SSS |
29000 | Hamilton Downtown | 20.9 | 22.5 | 23.7 | 23.3 | 23.9 | 24.2 | 22.6 | 23.2 | 24.1 | 23.82 | 7.4 | Non-SSS |
29118 | Hamilton West | 20.6 | 23.0 | 22.8 | 22.1 | 22.5 | 23.7 | 23.3 | 23.0 | 23.5 | 22.85 | 5.1 | Non-SSS |
29214 | Hamilton Mountain | 25.0 | 27.3 | 27.3 | 26.3 | 26.8 | 27.4 | 25.9 | 25.9 | 27.2 | 26.21 | -0.5 | Non-SSS |
33003 | Toronto East | 20.3 | 22.0 | 21.6 | 20.5 | 22.5 | 23.3 | 22.4 | 23.5 | 24.2 | 24.07 | 17.2 | SSS |
34021 | Toronto North | 20.7 | 22.3 | 22.8 | 22.1 | 22.6 | 22.3 | 22.0 | 22.8 | 23.7 | 23.8 | 9.9 | SSS |
35125 | Toronto West | 17.2 | 19.5 | 19.4 | 18.6 | 19.4 | 20.5 | 19.4 | 20.1 | 21.6 | 20.74 | 18.2 | SSS |
44008 | Burlington | 22.5 | 24.4 | 24.1 | 23.8 | 25.6 | 25.7 | 24.7 | 25.2 | 26.2 | 25.29 | 10.7 | SSS |
44017 | Oakville | 23.1 | 26.6 | 26.5 | 25.3 | 25.1 | 25.9 | 26.0 | 26.0 | 26.3 | 26.49 | 6.3 | Non-SSS |
44029 | Milton | 22.2 | 25.5 | 26.3 | 24.9 | 24.7 | 25.9 | 24.9 | 25.5 | 25.6 | 24.81 | 0.2 | Non-SSS |
45027 | Oshawa | 24.1 | 26.4 | 26.7 | 24.3 | 25.6 | 27.3 | 25.4 | 24.5 | 25.7 | 26.73 | 2.3 | Non-SSS |
46090 | Brampton | 22.2 | 24.6 | 24.8 | 23.8 | 24.1 | 25.6 | 25.6 | 25.3 | 26.5 | 26.1 | 12.6 | SSS |
46108 | Mississauga | 22.2 | 24.3 | 24.7 | 23.6 | 24.2 | 25.5 | 24.6 | 24.2 | 24.7 | 24.67 | 4.7 | Non-SSS |
47045 | Barrie | 23.9 | 25.5 | 25.8 | 24.4 | 24.8 | 26.3 | 26.5 | 26.4 | 26.1 | 25.07 | 6.1 | Non-SSS |
48006 | Newmarket | 26.0 | 27.5 | 28.1 | 26.6 | 26.3 | 27.2 | 27.3 | 27.3 | 27.5 | 28.78 | 6.0 | Non-SSS |
49005 | Parry Sound | 28.1 | 30.6 | 30.6 | 29.8 | 30.0 | 31.1 | 30.7 | 31.3 | 31.0 | 30.6 | 4.1 | Non-SSS |
49010 | Dorset | 27.7 | 30.1 | 30.1 | 28.8 | 29.0 | 29.6 | 30.0 | 30.1 | 29.5 | 28.84 | 0.4 | Non-SSS |
51001 | Ottawa Downtown | 23.5 | 24.9 | 25.1 | 24.0 | 24.3 | 25.6 | 25.5 | 26.2 | 24.9 | 24.68 | 6.0 | Non-SSS |
51010 | Petawawa | 27.5 | 29.9 | 29.6 | 28.5 | 28.6 | 29.3 | 29.8 | 30.4 | 30.0 | 29.05 | 4.2 | Non-SSS |
52023 | Kingston | 28.6 | 28.8 | 30.4 | 28.9 | 28.5 | 30.2 | 28.6 | 29.9 | 29.2 | 28.94 | 0.7 | Non-SSS |
54012 | Belleville | 24.6 | 28.2 | 29.1 | 27.0 | 28.2 | 29.7 | 28.1 | 29.3 | 28.7 | 28.67 | 7.1 | Non-SSS |
56051 | Cornwall | 24.2 | 25.7 | 27.6 | 26.6 | 26.0 | 27.4 | 26.3 | 27.5 | 26.5 | 26.0 | 3.7 | Non-SSS |
59006 | Peterborough | 25.5 | 28.0 | 28.6 | 27.7 | 27.8 | 28.7 | 27.9 | 28.5 | 27.3 | 27.72 | 0.0 | Non-SSS |
63203 | Thunder Bay | 24.7 | 27.4 | 23.8 | 24.2 | 24.2 | 25.6 | 25.9 | 25.1 | 24.1 | 24.4 | -0.4 | Non-SSS |
71078 | Sault Ste. Marie | 27.6 | 29.4 | 29.2 | 27.7 | 28.0 | 29.5 | 30.2 | 29.5 | 29.6 | 29.54 | 3.3 | SSS |
75010 | North Bay | 24.4 | 27.8 | 27.1 | 26.4 | 26.4 | 27.6 | 25.9 | 26.9 | 27.4 | 26.23 | -0.9 | Non-SSS |
77233 | Sudbury | 27.6 | 26.6 | 25.8 | 24.3 | 24.0 | 26.1 | 26.0 | 26.7 | 25.7 | 24.39 | -4.5 | Non-SSS |
Notes:
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 15026 replaced station 15025 as the London site in 2013.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 34021 replaced station 34020 as the Toronto North site in 2017.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 45027 replaced station 45026 as the Oshawa site in 2018.
- Station 46090 replaced station 46089 as the Brampton site in 2017.
- Station 52023 replaced station 52022 as the Kingston site in 2014.
- Station 77233 replaced station 77219 as the Sudbury site in 2013.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for sulphur dioxide (SO2)
Annual mean (ppb)
SO2 1y AAQC: 4 ppb
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 2.8 | 2.4 | 2.4 | 1.9 | 1.1 | 1.0 | 0.6 | 0.4 | 0.3 | 0.4 | -91.6 | SSS |
12016 | Windsor West | 2.8 | 2.6 | 2.8 | 1.9 | 1.4 | 0.9 | 0.7 | 0.8 | 0.8 | 0.7 | -74.1 | SSS |
14111 | Sarnia | 4.1 | 3.8 | 3.5 | 3.2 | INS | 1.7 | 1.9 | 1.9 | 2.0 | 2.2 | -44.8 | SSS |
29000 | Hamilton Downtown | 4.8 | 4.8 | 5.1 | 4.3 | 3.2 | 3.5 | 5.0 | 4.8 | 3.7 | 3.8 | -14.2 | SSS |
29214 | Hamilton Mountain | 3.7 | 2.8 | 2.9 | 2.6 | 1.8 | 1.8 | 2.4 | 3.5 | 2.5 | 3.2 | -9.7 | SSS |
35125 | Toronto West | 0.6 | 0.6 | 0.7 | 1.0 | 0.6 | 0.5 | 0.3 | 0.3 | 0.2 | 0.2 | -82.8 | SSS |
44029 | Milton | 1.3 | 1.2 | 1.3 | 1.1 | 0.9 | 0.7 | 0.7 | INS | INS | INS | N/A | N/A |
51001 | Ottawa Downtown | 0.3 | 0.3 | 0.3 | 0.4 | 0 | 0.1 | 0.2 | 0.2 | 0.1 | 0.2 | -22.2 | Non-SSS |
71078 | Sault Ste. Marie | 0.6 | 0.8 | 0.8 | 0.8 | 0.6 | 0.7 | 0.8 | 0.7 | 0.6 | 0.8 | 0.0 | Non-SSS |
77233 | Sudbury | 1.3 | 2.8 | 2.4 | 2.4 | 2.1 | 1.3 | 1.2 | 1.2 | 0.9 | 0.9 | -63.0 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- Station 29214 replaced station 29114 as the Hamilton Mountain site in 2019.
- Station 44029 was operated by the Halton Region prior to 2019.
- Station 77233 replaced station 77219 as the Sudbury site in 2013.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for carbon monoxide (CO)
1h maximum (ppm)
CO 1h AAQC: 30 ppm
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 2.1 | 1.9 | 1.8 | 1.9 | 2.3 | 2.6 | 1.9 | 2.3 | 1.2 | 1.6 | -17.2 | Non-SSS |
29000 | Hamilton Downtown | 1.7 | 2.0 | 2.9 | 1.3 | 1.4 | 2.1 | 1.7 | 1.9 | 1.2 | 1.5 | -24.2 | Non-SSS |
35125 | Toronto West | 1.4 | 1.4 | 1.6 | 1.3 | 1.7 | 1.2 | 0.9 | 1.5 | 1.6 | 1.2 | -14.2 | Non-SSS |
51001 | Ottawa Downtown | 0.9 | 0.9 | 0.8 | 0.8 | 0.9 | 0.7 | 1.0 | 0.7 | 0.9 | 0.8 | -16.9 | Non-SSS |
Note:
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for benzene
Annual mean (µg/m3)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 0.558 | 0.519 | 0.610 | 0.566 | 0.521 | 0.450 | 0.478 | 0.445 | N/A | 0.527 | -24.5 | SSS |
14111 | Sarnia | 0.900 | 0.820 | 1.007 | 1.191 | 0.689 | 0.604 | 0.574 | 0.419 | N/A | 0.570 | -45.3 | SSS |
15026 | London | 0.455 | 0.413 | 0.446 | 0.451 | 0.341 | 0.339 | 0.321 | 0.296 | N/A | N/A | -47.2 | SSS |
26060 | Kitchener | 0.479 | N/A | 0.483 | 0.548 | 0.395 | 0.446 | 0.355 | 0.290 | N/A | N/A | -50.1 | SSS |
29000 | Hamilton Downtown | 0.977 | INS | 0.899 | 1.092 | 0.675 | 0.569 | 0.639 | 0.568 | N/A | 0.613 | -41.0 | SSS |
48006 | Newmarket | 0.371 | 0.406 | 0.422 | 0.425 | 0.328 | 0.385 | INS | 0.250 | N/A | N/A | -37.9 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- N/A indicates data not available.
- The 2016 average for Sarnia is derived from data from May to December 2016.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- The 2018 average for Windsor West is derived from data from February to July, and October to December in 2018.
- The 2018 average for Sarnia is derived from data from February to May, July, and October to December in 2018.
- The 2018 average for Hamilton Downtown is derived from data from March to June, August, and October to December in 2018.
- SSS - Significant Sen's Slope (significant trend detected).
10-year trend for toluene
Annual mean (µg/m3)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 1.392 | 1.017 | 1.542 | 1.248 | 1.272 | 0.972 | 1.131 | 0.797 | N/A | 1.085 | -40.7 | SSS |
14111 | Sarnia | 2.539 | 1.587 | 1.908 | 2.350 | 1.778 | 1.550 | 1.014 | 0.779 | N/A | 1.053 | -49.6 | SSS |
15026 | London | 1.408 | 0.887 | 0.839 | 1.013 | 0.727 | 0.633 | 0.657 | 0.491 | N/A | N/A | -70.8 | SSS |
26060 | Kitchener | 1.322 | N/A | 1.278 | 1.052 | 1.020 | 1.002 | 0.625 | 0.572 | N/A | N/A | -67.1 | SSS |
29000 | Hamilton Downtown | 2.067 | INS | 2.229 | 2.249 | 1.642 | 1.296 | 0.862 | 0.817 | N/A | 1.314 | -63.5 | SSS |
48006 | Newmarket | 0.877 | 0.916 | 0.732 | 1.340 | 1.118 | 0.807 | INS | 0.418 | N/A | N/A | -47.5 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- N/A indicates data not available.
- The 2016 average for Sarnia is derived from data from May to December 2016.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- The 2018 average for Windsor West is derived from data from February to July, and October to December in 2018.
- The 2018 average for Sarnia is derived from data from February to May, July, and October to December in 2018.
- The 2018 average for Hamilton Downtown is derived from data from March to June, August, and October to December in 2018.
- SSS - Significant Sen's Slope (significant trend detected).
10-year trend for ethylbenzene
Annual mean (µg/m3)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 0.221 | 0.179 | 0.267 | 0.238 | 0.234 | 0.181 | 0.187 | 0.137 | N/A | 0.328 | -39.4 | SSS |
14111 | Sarnia | 0.278 | 0.255 | 0.253 | 0.362 | 0.282 | 0.211 | 0.235 | 0.118 | N/A | 0.187 | -45.8 | SSS |
15026 | London | 0.143 | 0.125 | 0.121 | 0.149 | 0.108 | 0.105 | 0.141 | 0.070 | N/A | N/A | -52.2 | SSS |
26060 | Kitchener | 0.162 | N/A | 0.167 | 0.168 | 0.159 | 0.164 | 0.109 | 0.079 | N/A | N/A | -53.3 | SSS |
29000 | Hamilton Downtown | 0.193 | INS | 0.192 | 0.210 | 0.186 | 0.187 | 0.129 | 0.126 | N/A | 0.172 | -39.5 | SSS |
48006 | Newmarket | 0.115 | 0.134 | 0.125 | 0.249 | 0.215 | 0.130 | INS | 0.067 | N/A | N/A | -37.1 | Non-SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- N/A indicates data not available.
- The 2016 average for Sarnia is derived from data from May to December 2016.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- The 2018 average for Windsor West is derived from data from February to July, and October to December in 2018.
- The 2018 average for Sarnia is derived from data from February to May, July, and October to December in 2018.
- The 2018 average for Hamilton Downtown is derived from data from March to June, August, and October to December in 2018.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for m- and p-xylene
Annual mean (µg/m3)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 0.689 | 0.536 | 0.825 | 0.702 | 0.635 | 0.505 | 0.502 | 0.409 | N/A | 0.619 | -45.2 | SSS |
14111 | Sarnia | 0.676 | 0.510 | 0.629 | 0.850 | 0.495 | 0.499 | 0.563 | 0.256 | N/A | 0.319 | -38.0 | SSS |
15026 | London | 0.388 | 0.345 | 0.318 | 0.398 | 0.267 | 0.268 | 0.407 | 0.200 | N/A | N/A | -50.8 | SSS |
26060 | Kitchener | 0.478 | N/A | 0.469 | 0.464 | 0.434 | 0.451 | 0.276 | 0.223 | N/A | N/A | -61.0 | SSS |
29000 | Hamilton Downtown | 0.603 | INS | 0.594 | 0.621 | 0.518 | 0.532 | 0.359 | 0.398 | N/A | 0.486 | -43.2 | SSS |
48006 | Newmarket | 0.333 | 0.362 | 0.334 | 0.582 | 0.484 | 0.350 | INS | 0.191 | N/A | N/A | -40.2 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- N/A indicates data not available.
- The 2016 average for Sarnia is derived from data from May to December 2016.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- The 2018 average for Windsor West is derived from data from February to July, and October to December in 2018.
- The 2018 average for Sarnia is derived from data from February to May, July, and October to December in 2018.
- The 2018 average for Hamilton Downtown is derived from data from March to June, August, and October to December in 2018.
- SSS - Significant Sen's Slope (significant trend detected).
10-year trend for o-xylene
Annual mean (µg/m3)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 0.228 | 0.184 | 0.283 | 0.239 | 0.232 | 0.190 | 0.184 | 0.147 | N/A | 0.246 | -33.6 | SSS |
14111 | Sarnia | 0.244 | 0.171 | 0.226 | 0.313 | 0.178 | 0.192 | 0.213 | 0.101 | N/A | 0.122 | -38.0 | SSS |
15026 | London | 0.126 | 0.118 | 0.113 | 0.146 | 0.103 | 0.103 | 0.148 | 0.074 | N/A | N/A | -38.1 | SSS |
26060 | Kitchener | 0.157 | N/A | 0.166 | 0.164 | 0.153 | 0.164 | 0.107 | 0.082 | N/A | N/A | -58.0 | SSS |
29000 | Hamilton Downtown | 0.195 | INS | 0.206 | 0.216 | 0.189 | 0.198 | 0.131 | 0.145 | N/A | 0.183 | -30.2 | SSS |
48006 | Newmarket | 0.116 | 0.126 | 0.134 | 0.218 | 0.192 | 0.128 | INS | 0.068 | N/A | N/A | -38.0 | Non-SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- N/A indicates data not available.
- The 2016 average for Sarnia is derived from data from May to December 2016.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- The 2018 average for Windsor West is derived from data from February to July, and October to December in 2018.
- The 2018 average for Sarnia is derived from data from February to May, July, and October to December in 2018.
- The 2018 average for Hamilton Downtown is derived from data from March to June, August, and October to December in 2018.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
10-year trend for 1,3-butadiene
Annual mean (µg/m3)
ID | City/Town | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 10 year (%) |
Trend |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12016 | Windsor West | 0.048 | 0.036 | 0.042 | 0.035 | 0.032 | 0.034 | 0.028 | 0.028 | N/A | 0.038 | -32.3 | SSS |
14111 | Sarnia | 0.205 | 0.209 | 0.124 | 0.216 | 0.089 | 0.077 | 0.088 | 0.054 | N/A | 0.071 | -66.9 | SSS |
15026 | London | 0.040 | 0.023 | 0.025 | 0.026 | 0.020 | 0.035 | 0.025 | 0.025 | N/A | N/A | -12.8 | Non-SSS |
26060 | Kitchener | 0.042 | N/A | 0.029 | 0.029 | 0.023 | 0.038 | 0.026 | 0.025 | N/A | N/A | -32.3 | SSS |
29000 | Hamilton Downtown | 0.046 | INS | 0.032 | 0.037 | 0.025 | 0.039 | 0.028 | 0.028 | N/A | 0.036 | -19.9 | Non-SSS |
48006 | Newmarket | 0.039 | 0.021 | 0.020 | 0.028 | 0.024 | 0.035 | INS | 0.025 | N/A | N/A | 0.0 | Non-SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- N/A indicates data not available.
- The 2016 average for Sarnia is derived from data from May to December 2016.
- Station 14111 replaced station 14064 as the Sarnia site in 2016.
- The 2018 average for Windsor West is derived from data from February to July, and October to December in 2018.
- The 2018 average for Sarnia is derived from data from February to May, July, and October to December in 2018.
- The 2018 average for Hamilton Downtown is derived from data from March to June, August, and October to December in 2018.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
Canadian Ambient Air Quality Standard reporting
Air zone area | City/Town | 24-hour PM2.5 (μg/m3) |
Annual PM2.5 (μg/m3) |
8-hour ozone (ppb) |
---|---|---|---|---|
Sarnia | Sarnia | 19 | 7.3 | 70*(41) |
Hamilton | Hamilton Downtown | 21 | 8.6 | 61(48) |
Hamilton | Hamilton Mountain | 19 | 7.6 | 64*(50) |
Sudbury | Sudbury | 15 | 5.3 | 56(43) |
Sault Ste. Marie | Sault Ste. Marie | 14 | 5 | 59(44) |
Northern Ontario | Thunder Bay | 17 | 5.7 | 51(44) |
Southern Ontario | Windsor Downtown | 18 | 7.7 | 67*(41) |
Southern Ontario | Chatham | 17 | 6.9 | 64*(43) |
Southern Ontario | London | 18 | 7 | 62(46) |
Southern Ontario | Brantford | 18 | 7.3 | 64*(49) |
Southern Ontario | Kitchener | 19 | 7.2 | 61(48) |
Southern Ontario | Guelph | 20 | 7.2 | 62(49) |
Southern Ontario | St. Catharines | 17 | 6.6 | 63*(48) |
Southern Ontario | Burlington | 18 | 6.9 | 64*(53) |
Southern Ontario | Oakville | 18 | 6.9 | 65*(52) |
Southern Ontario | Milton | 19 | 7.4 | 65*(52) |
Southern Ontario | Mississauga | 19 | 7.1 | 61(48) |
Southern Ontario | Brampton | 18 | 6.9 | 66*(52) |
Southern Ontario | Toronto West | 18 | 7.2 | 63*(50) |
Southern Ontario | Toronto Downtown | 21 | 8 | 65*(51) |
Southern Ontario | Toronto North | 19 | 6.9 | 66*(50) |
Southern Ontario | Toronto East | 20 | 7 | 61(45) |
Southern Ontario | Oshawa | 18 | 6.2 | 63*(45) |
Southern Ontario | Barrie | 19 | 7.1 | 58(44) |
Southern Ontario | Peterborough | 18 | 6 | 61(46) |
Southern Ontario | Kingston | 16 | 5.8 | 64*(46) |
Southern Ontario | Ottawa Downtown | 17 | 6.1 | 57(47) |
Note:
- Designated sites normally refer to communities with populations greater than 100,000.
- The CAAQS for 24h PM2.5 is 27 μg/m3 based on the 98th percentile measurement annually, averaged over three consecutive years.
- The CAAQS for annual PM2.5 is 8.8 μg/m3 based on the annual average of the daily 24-hour average concentrations averaged over three consecutive years.
- The CAAQS for ozone is 62 ppb based on the consecutive three-year average of the annual 4th highest daily maximum eight-hour running average.
- The 24h PM2.5 and 8h ozone CAAQS metrics for Toronto Downtown are based on a 2-year average.
- An asterisk denotes an exceedance of the CAAQS.
- Value in parenthesis is the calculated 8h ozone CAAQS metric once the transboundary influence was removed.
Air zone area | City/Town | 1-hour NO2 (ppb) | Annual NO2 (ppb) | 1-hour SO2 (ppb) | Annual SO2 (ppb) |
---|---|---|---|---|---|
Sarnia | Sarnia | 38 | 6.8 | 66 | 2.2 |
Hamilton | Hamilton Downtown | 44 | 10.2 | 82* | 3.8 |
Hamilton | Hamilton Mountain | 40 | 6.3 | 61 | 3.2 |
Sudbury | Sudbury | 46 | 5.6 | 45 | 0.9 |
Sault Ste. Marie | Sault Ste. Marie | 30 | 3.9 | 33 | 0.8 |
Northern Ontario | Thunder Bay | 41 | 6.5 | N/A | N/A |
Southern Ontario | Windsor Downtown | 43 | 9.6 | 13 | 0.4 |
Southern Ontario | Chatham | 30 | 5.1 | N/A | N/A |
Southern Ontario | London | 30 | 5.2 | N/A | N/A |
Southern Ontario | Brantford | 27 | 4.6 | N/A | N/A |
Southern Ontario | Kitchener | 35 | 4.8 | N/A | N/A |
Southern Ontario | Guelph | 34 | 5.5 | N/A | N/A |
Southern Ontario | St. Catharines | 33 | 5.8 | N/A | N/A |
Southern Ontario | Burlington | 42 | 8.7 | N/A | N/A |
Southern Ontario | Oakville | 41 | 7.3 | N/A | N/A |
Southern Ontario | Milton | 44 | 8.2 | INS | INS |
Southern Ontario | Mississauga | 38 | 7 | N/A | N/A |
Southern Ontario | Brampton | 43 | 6.5 | N/A | N/A |
Southern Ontario | Toronto West | 49 | 12.9 | 7 | 0.2 |
Southern Ontario | Toronto Downtown | 51 | 12.7 | N/A | N/A |
Southern Ontario | Toronto North | 45 | 9.3 | 6 | 0.2 |
Southern Ontario | Toronto East | 47 | 9.5 | N/A | N/A |
Southern Ontario | Oshawa | 22 | 3.3 | N/A | N/A |
Southern Ontario | Barrie | 40 | 5.6 | N/A | N/A |
Southern Ontario | Peterborough | 34 | 4.1 | N/A | N/A |
Southern Ontario | Kingston | 31 | 3.8 | N/A | N/A |
Southern Ontario | Ottawa Downtown | 40 | 5.7 | 2 | 0.2 |
Note:
- Designated sites normally refer to communities with populations greater than 100,000.
- The CAAQS for 1h NO2 is 60 ppb is based on the 3-year average of the annual 98th percentile of the daily maximum 1-hour average NO2 concentrations.
- The CAAQS for annual NO2 is 17.0 ppb based on the average over a single calendar year of all the 1h average NO2 concentrations.
- The CAAQS for 1h SO2 is 70 ppb based on the 3-year average of the annual 99th percentile of the SO2 daily maximum 1-hour average concentrations.
- The CAAQS for annual SO2 is 5.0 ppb based on the average over a single calendar year of all 1h average SO2 concentrations.
- The 1h NO2 CAAQS metric for Toronto Downtown is based on a 2-year average.
- An asterisk denotes an exceedance of the CAAQS.
- INS denotes insufficient data to report a valid CAAQS metric.
- N/A denotes not applicable (parameter not monitored at location).
Air zone area | City/Town | 10-year trend (%) based on 24-hour PM2.5 |
10-year trend (%) based on annual PM2.5 |
10-year trend (%) based on 8-hour ozone |
---|---|---|---|---|
Sarnia | Sarnia | -30.6 | -46.9 | 0* |
Hamilton | Hamilton Downtown | -26.6 | -16.4 | -7.9 |
Hamilton | Hamilton Mountain | -16 | -13.4* | -9.4 |
Sudbury | Sudbury | -14.1 | -6.9* | -6.8 |
Sault Ste. Marie | Sault Ste. Marie | -19.4 | -15.5 | -10.9 |
Northern Ontario | Thunder Bay | 0* | -8.6* | -10.7 |
Southern Ontario | Windsor Downtown | -19.6 | -18.9 | -11.4 |
Southern Ontario | Chatham | -22 | -19.9 | -16 |
Southern Ontario | London | -15.9* | -23.5 | -16.9 |
Southern Ontario | Brantford | -20.7* | -13.4 | -13.5 |
Southern Ontario | Kitchener | -16.3 | -15.4 | -11.4 |
Southern Ontario | Guelph | -6.1 | -5.9* | -12.5 |
Southern Ontario | St. Catharines | -19.7 | -21.4 | -10.3 |
Southern Ontario | Burlington | -20.2 | -20.9 | -5.6 |
Southern Ontario | Oakville | -16.8 | -14.9 | -6.3 |
Southern Ontario | Milton | -10.7* | -9.5* | -7.6 |
Southern Ontario | Mississauga | -17.5* | -11.4 | -10.3 |
Southern Ontario | Brampton | -19.6* | -13 | -4.3* |
Southern Ontario | Toronto West | -20.2 | -20.2 | -10.7 |
Southern Ontario | Toronto Downtown | INS | INS | INS |
Southern Ontario | Toronto North | -27.1 | -27.3 | -3.3 |
Southern Ontario | Toronto East | -13.8 | -14.7 | -12.9 |
Southern Ontario | Oshawa | -15.3 | -18.4* | -7.2* |
Southern Ontario | Barrie | -15.9* | 0* | -11.8 |
Southern Ontario | Peterborough | -13.8* | -14.6 | -12.3 |
Southern Ontario | Kingston | -40.9 | -37.8 | -7.9 |
Southern Ontario | Ottawa Downtown | -22.2 | -13.3* | -6 |
Notes:
- Designated sites normally refer to communities with populations greater than 100,000.
- *Non-Significant Sen’s Slope (significant trend not detected).
- INS denotes insufficient data for a valid 10-year trend.
Air zone area | City/Town | 10-year trend (%) based on 1-hour NO2 |
10-year trend (%) based on annual NO2 |
10-year trend (%) based on 1-hour SO2 |
10-year trend (%) based on annual SO2 |
---|---|---|---|---|---|
Sarnia | Sarnia | 0* | -25 | 0* | -44.8 |
Hamilton | Hamilton Downtown | -7.3 | -17.2 | 7.9* | -14.2 |
Hamilton | Hamilton Mountain | -7.0* | -27 | 0* | -9.7 |
Sudbury | Sudbury | INS | -8.2 | -87.8 | -63 |
Sault Ste. Marie | Sault Ste. Marie | -8.8 | -25 | -11.3 | 0* |
Northern Ontario | Thunder Bay | 0* | -15.5 | N/A | N/A |
Southern Ontario | Windsor Downtown | -17 | -28.6 | -80.7 | -91.6 |
Southern Ontario | Chatham | -13.2 | -19.5 | N/A | N/A |
Southern Ontario | London | -23.1 | -27.8 | N/A | N/A |
Southern Ontario | Brantford | -18.2 | -10.9 | N/A | N/A |
Southern Ontario | Kitchener | -15.7 | -27.1 | N/A | N/A |
Southern Ontario | Guelph | -11.8 | -25.5 | N/A | N/A |
Southern Ontario | St. Catharines | -15.8 | -32 | N/A | N/A |
Southern Ontario | Burlington | -6.7 | -24.4 | N/A | N/A |
Southern Ontario | Oakville | -9.8 | -17.7 | N/A | N/A |
Southern Ontario | Milton | 0* | -11.2 | INS | INS |
Southern Ontario | Mississauga | -14 | -29.9 | N/A | N/A |
Southern Ontario | Brampton | -11.8* | -35 | N/A | N/A |
Southern Ontario | Toronto West | -12.9 | -26.7 | -51.1 | -82.8 |
Southern Ontario | Toronto Downtown | INS | INS | N/A | N/A |
Southern Ontario | Toronto North | -8.7 | -36.5 | N/A | N/A |
Southern Ontario | Toronto East | -6.8 | -41.6 | N/A | N/A |
Southern Ontario | Oshawa | -25.7* | -50.2 | N/A | N/A |
Southern Ontario | Barrie | -7.0* | -31.2 | N/A | N/A |
Southern Ontario | Peterborough | 8.3* | -32.6 | N/A | N/A |
Southern Ontario | Kingston | 0* | -11.2 | N/A | N/A |
Southern Ontario | Ottawa Downtown | 0* | -24.9 | -84.4 | -22.2* |
Notes:
- Designated sites normally refer to communities with populations greater than 100,000.
- *Non-Significant Sen’s Slope (significant trend not detected).
- INS denotes insufficient data for a valid 10-year trend.
- N/A denotes not applicable (parameter not monitored at location).
- Milton is based on 8 years of available data.
Management levels for CAAQS pollutants
Management level | 8-hour 2020 |
---|---|
Red | > 62 ppb |
Orange | 57 to 62 ppb |
Yellow | 51 to 56 ppb |
Green | ≤ 50 ppb |
Management level | 24-hour 2020 |
Annual 2020 |
---|---|---|
Red | > 27 µg/m3 | > 8.8 µg/m3 |
Orange | 20 to 27 µg/m3 | 6.5 to 8.8 µg/m3 |
Yellow | 11 to 19 µg/m3 | 4.1 to 6.4 µg/m3 |
Green | ≤ 10 µg/m3 | ≤ 4.0 µg/m3 |
Management level | 1-hour 2020 |
Annual 2020 |
---|---|---|
Red | > 70 ppb | > 5.0 ppb |
Orange | 51 to 70 ppb | 3.1 to 5.0 ppb |
Yellow | 31 to 50 ppb | 2.1 to 3.0 ppb |
Green | ≤ 30 ppb | ≤ 2.0 ppb |
Management level | 1-hour 2020 |
Annual 2020 |
---|---|---|
Red | > 60 ppb | > 17.0 ppb |
Orange | 32 to 60 ppb | 7.1 to 17.0 ppb |
Yellow | 21 to 30 ppb | 2.1 to 7.0 ppb |
Green | ≤ 20 ppb | ≤ 2.0 ppb |
Air quality management actions by air zone area
Type | Action | Description |
---|---|---|
Air permissions and approvals framework | Air Emissions Environmental Activity and Sector Registry | Businesses that engage in certain routine and lower risk activities that generate air emissions must self-register online in the Environmental Activity and Sector Registry. They must submit information about their emissions to the MECP and follow standardized rules set out in guidance materials. |
Air permissions and approvals framework | Environmental Compliance Approvals | Businesses with complex or unique types of operations must apply for an Environmental Compliance Approval (ECA). By law, a business must meet the specific conditions set out in the ECA. A business may also be inspected to ensure conditions are met. |
Regulations | Regulation 271/91: Gasoline Volatility | O. Reg. 271/91 specifies upper limits for gasoline volatility in southern and northern Ontario for the summer driving season and requires petroleum facilities to track and report gasoline volatility limits during this period. |
Regulations | O. Reg. 455/94: Recovery of Gasoline Vapour in Bulk Transfers | O. Reg. 455/9 reduces the discharge of gasoline vapour into the natural environment from terminals, bulk plants or service stations. |
SO2 and NOx emissions trading program | N/A | This program, administered under O. Reg. 397/01 and O. Reg. 194/05, sets limits for NOx and SO2 emissions from the regulated facilities and allows for the transfer or trade of emission allowances and credits between facilities, to provide flexibility for compliance. |
Ambient air standards | Ambient Air Quality Criteria (AAQC) | The AAQCs set out air contaminant concentrations that are protective against adverse effects on health and/or the environment. AAQCs are used to assess general (ambient) air quality resulting from all sources of a contaminant to air. |
Monitoring | Provincial Air Monitoring Network and Air Quality Health Index (AQHI) |
Ontario operates a network of 39 ambient (outside) air monitoring stations across the province that collect real-time air pollution data. The AQHI evaluates air monitoring information and issues hourly forecasts to help you understand what the quality of the air around you means to your health. |
Community engagement | Air Standards/Local Air Quality External Working Group | Ministry led facilitated discussions with industry, public health groups, environmental non-government organizations and some First Nations on matters relating to the local air quality regulation (O. Reg. 419/05). |
Ontario air quality management actions by air zone
Northern Ontario (excluding Sault Ste. Marie and Sudbury)
CAAQS management level
- PM2.5: yellow
- Ozone: green
- SO2: nil (no monitoring station in air zone)
- NO2: orange
Type | Action | Description |
---|---|---|
Industry standard registrations | Forest products industry standard |
|
Industry standard registrations | Pulp and paper industry standard |
|
Southern Ontario (excluding Sarnia/St. Clair Township and Hamilton)
CAAQS management level
- PM2.5: orange
- Ozone: yellow
- SO2: green
- NO2: orange
Type | Action | Description |
---|---|---|
Industry standard registrations | Metal finishers industry standard |
|
Industry standard registrations | Foundries industry standard |
|
Industry standard registrations | Petroleum refining industry standard |
|
Site-specific standards | ADM Agri-Industries Company in Windsor |
|
Site-specific standards | Stelco Lake Erie Works in Nanticoke |
|
Site-specific standards | Harsco Canada Corp in Nanticoke |
|
Site-specific standards | Owens Corning Composite Materials Canada LP in Guelph |
|
Site-specific standards | Oxy Vinyls Canada Co. in Thorold |
|
Sudbury
CAAQS management level
- PM2.5: yellow
- Ozone: green
- SO2: yellow
- NO2: orange
Type | Action | Description |
---|---|---|
Industry standard registrations | Metal finishers industry standard |
|
Site-specific standards | Glencore Canada Corporation |
|
Site-specific standards | Vale Canada Ltd. |
|
Sault Ste. Marie
CAAQS management level
- PM2.5: yellow
- Ozone: green
- SO2: nil (no monitoring station in air zone)
- NO2: orange
Type | Action | Description |
---|---|---|
Industry standard registrations | Forest products industry standard |
|
Site-specific standards | Algoma Steel Inc. |
|
Sarnia/St. Clair Township
CAAQS management level
- PM2.5: orange
- Ozone: green
- SO2: orange
- NO2: orange
Type | Action | Description |
---|---|---|
Regulations | O. Reg. 530/18: Air Pollution – Discharge of Sulphur Dioxide from Petroleum Facilities |
|
Regulations | Regulation 350 - Lambton Industry Meteorological Alert (LIMA) |
|
Policy | Cumulative effects assessment in air approvals |
|
Industry standard registrations | Petroleum refining industry standard |
|
Industry standard registrations | Petrochemical industrial standard |
|
Enhanced monitoring | Property line monitoring, petroleum refining and petrochemical industries |
|
Enhanced monitoring | SLEA air monitoring network |
|
Enhanced community engagement | Sarnia Area Environmental Health Project |
|
Enhanced community engagement | Clean Air Sarnia Area (CASA) |
|
Enhanced strategic planning | Sarnia action plan |
|
Hamilton
CAAQS management level
- PM2.5: orange
- Ozone: yellow
- SO2: red
- NO2: orange
Type | Action | Description |
---|---|---|
Policy | Cumulative effects assessment in air approvals |
|
Policy | Local Poor Air Quality Notification Protocol |
|
Industry standard registrations | Foundries industry standard |
|
Site-specific standards | Stelco |
|
Site-specific standards | ArcelorMittal Dofasco |
|
Site-specific standards | Harsco Canada Corp |
|
Site-specific standards | Rain Carbon (formerly Ruetgers Canada Inc.) |
|
Site-specific standards | Carmeuse Lime (Canada) Limited |
|
Enhanced monitoring | Hamilton Air Monitoring Network (HAMN) |
|
Enhanced community engagement | Clean Air Hamilton |
|
Enhanced strategic planning | Hamilton Air Action Plan (HAAP) |
|
Changes in air quality management actions since 2021
Air zone | Program/Regulation | Description |
---|---|---|
All Ontario Air Zones | SO2 and NOx emissions trading program | This program ended when the regulations were revoked on February 5, 2021. |
Sudbury | Glencore Canada Corporation site specific standard for sulphur dioxide | Site-specific standard for sulphur dioxide ended on January 1, 2022, when O. Reg. 652/21: Air Pollution – Discharge of Sulphur Dioxide from Nickel Smelting and Refining Facilities in the Sudbury Area took effect. |
Sudbury | Vale Canada Ltd. site-specific standard for sulphur dioxide | Site-specific standard for sulphur dioxide ended on January 1, 2022, when O. Reg. 652/21: Air Pollution – Discharge of Sulphur Dioxide from Nickel Smelting and Refining Facilities in the Sudbury Area took effect. |
Hamilton | Rain Carbon (formerly Ruetgers Canada Inc.) site-specific standards for benzene and benzo(a)pyrene | These site-specific standards expired in 2022. |
Air zone | Program/Regulation | Description |
---|---|---|
Northern Ontario | Foundries industry standard |
|
Southern Ontario | Ontario Regulation 88/22 - Air Pollution - Discharge of Sulphur Dioxide from Petroleum Facilities |
|
Southern Ontario | Metal finishers industry standard |
|
Southern Ontario | OPG Lennox site-specific standards |
|
Southern Ontario | Asphalt mix industry standard |
|
Sudbury | O. Reg 652/21: Air Pollution – Discharge of Sulphur Dioxide from Nickel Smelting and Refining Facilities in the Sudbury Area |
|
Sarnia/St. Clair Township | Ontario Regulation 88/22 - Air Pollution - Discharge of Sulphur Dioxide from Petroleum Facilities |
|
AQHI and air quality alert program reporting
Station ID | City/Town | No. of valid hours | Low risk AQHI=1 | Low risk AQHI=2 | Low risk AQHI=3 | Moderate risk AQHI=4 | Moderate risk AQHI=5 | Moderate risk AQHI=6 | High risk AQHI=7 | High risk AQHI=8 | High risk AQHI=9 | High risk AQHI=10 | Very high risk AQHI=+ | No. of days at least 1 hour > 6 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 8721 | 1.55 | 42.99 | 41.30 | 13.31 | 0.70 | 0.13 | 0.02 | 0 | 0 | 0 | 0 | 1 |
12016 | Windsor West | 8475 | 1.90 | 43.89 | 40.60 | 11.81 | 1.58 | 0.17 | 0.05 | 0 | 0 | 0 | 0 | 3 |
13001 | Chatham | 8613 | 8.02 | 55.74 | 29.58 | 6.41 | 0.22 | 0.02 | 0 | 0 | 0 | 0 | 0 | 0 |
14111 | Sarnia | 8397 | 5.09 | 55.19 | 26.89 | 10.56 | 2.18 | 0.02 | 0.07 | 0 | 0 | 0 | 0 | 2 |
15020 | Grand Bend | 8645 | 15.48 | 60.45 | 19.94 | 3.69 | 0.23 | 0 | 0.19 | 0.02 | 0 | 0 | 0 | 6 |
15026 | London | 8728 | 11.55 | 53.36 | 28.43 | 6.46 | 0.21 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
16015 | Port Stanley | 8079 | 15.20 | 60.07 | 19.94 | 4.57 | 0.21 | 0.01 | 0 | 0 | 0 | 0 | 0 | 0 |
18007 | Tiverton | 8070 | 11.88 | 62.29 | 21.73 | 3.98 | 0.11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
21005 | Brantford | 8681 | 14.51 | 54.66 | 25.46 | 4.99 | 0.38 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
26060 | Kitchener | 8533 | 12.53 | 55.22 | 27.24 | 4.68 | 0.33 | 0 | 0.01 | 0 | 0 | 0 | 0 | 1 |
27067 | St. Catharines | 8498 | 8.66 | 53.82 | 31.89 | 5.34 | 0.28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
28028 | Guelph | 8666 | 10.29 | 52.35 | 30.04 | 6.53 | 0.74 | 0 | 0.05 | 0 | 0 | 0 | 0 | 1 |
29000 | Hamilton Downtown | 8571 | 5.16 | 42.95 | 37.45 | 11.03 | 2.81 | 0.40 | 0.21 | 0 | 0 | 0 | 0 | 2 |
29118 | Hamilton West | 8619 | 6.53 | 47.77 | 34.93 | 8.97 | 1.46 | 0.30 | 0.03 | 0 | 0 | 0 | 0 | 2 |
29214 | Hamilton Mountain | 8679 | 8.58 | 52.94 | 29.95 | 7.19 | 1.13 | 0.21 | 0 | 0 | 0 | 0 | 0 | 0 |
31129 | Toronto Downtown | 8162 | 1.94 | 34.39 | 47.65 | 12.99 | 2.52 | 0.32 | 0.12 | 0.04 | 0 | 0.04 | 0 | 5 |
33003 | Toronto East | 8669 | 5.48 | 50.06 | 33.91 | 9.33 | 1.14 | 0.07 | 0 | 0 | 0 | 0 | 0 | 0 |
34021 | Toronto North | 8406 | 8.09 | 48.01 | 33.02 | 9.31 | 1.50 | 0.02 | 0.04 | 0 | 0 | 0 | 0 | 1 |
35125 | Toronto West | 8624 | 3.46 | 44.10 | 40.05 | 10.44 | 1.63 | 0.30 | 0.02 | 0 | 0 | 0 | 0 | 2 |
44008 | Burlington | 8704 | 6.61 | 48.86 | 34.01 | 9.23 | 1.30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
44017 | Oakville | 8563 | 6.63 | 52.63 | 32.43 | 7.19 | 0.96 | 0.13 | 0.02 | 0 | 0 | 0 | 0 | 1 |
44029 | Milton | 8646 | 6.52 | 52.29 | 31.64 | 8.37 | 1.08 | 0.06 | 0.03 | 0 | 0 | 0 | 0 | 1 |
45027 | Oshawa | 8725 | 23.97 | 57.56 | 15.01 | 3.17 | 0.28 | 0.01 | 0 | 0 | 0 | 0 | 0 | 0 |
46090 | Brampton | 8659 | 9.46 | 53.67 | 30.57 | 5.55 | 0.68 | 0.03 | 0.03 | 0 | 0 | 0 | 0 | 1 |
46108 | Mississauga | 8364 | 11.31 | 53.78 | 27.81 | 6.43 | 0.62 | 0.04 | 0.01 | 0 | 0 | 0 | 0 | 1 |
47045 | Barrie | 8464 | 19.70 | 56.40 | 19.98 | 3.54 | 0.30 | 0.02 | 0.02 | 0.04 | 0 | 0 | 0 | 2 |
48006 | Newmarket | 8742 | 12.21 | 57.26 | 24.61 | 5.44 | 0.47 | 0 | 0.01 | 0 | 0 | 0 | 0 | 1 |
49005 | Parry Sound | 8748 | 19.83 | 61.01 | 16.43 | 2.64 | 0.09 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
49010 | Dorset | 8734 | 29.20 | 55.10 | 13.69 | 1.98 | 0.03 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
51001 | Ottawa Downtown | 8657 | 19.06 | 53.61 | 23.98 | 3.34 | 0.01 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
51010 | Petawawa | 8648 | 28.67 | 57.49 | 12.86 | 0.98 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
52023 | Kingston | 8693 | 13.45 | 58.64 | 23.19 | 4.19 | 0.53 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
54012 | Belleville | 8502 | 13.03 | 61.03 | 21.92 | 3.58 | 0.42 | 0 | 0.01 | 0 | 0 | 0 | 0 | 1 |
56051 | Cornwall | 8572 | 17.50 | 56.77 | 21.79 | 3.79 | 0.12 | 0.03 | 0 | 0 | 0 | 0 | 0 | 0 |
59006 | Peterborough | 8711 | 19.37 | 54.12 | 21.19 | 4.86 | 0.42 | 0.03 | 0.01 | 0 | 0 | 0 | 0 | 1 |
63203 | Thunder Bay | 8740 | 17.46 | 56.17 | 22.67 | 3.01 | 0.58 | 0.07 | 0.03 | 0.01 | 0 | 0 | 0 | 2 |
71078 | Sault Ste. Marie | 8244 | 18.17 | 57.52 | 20.35 | 3.71 | 0.19 | 0.04 | 0.01 | 0 | 0 | 0 | 0 | 0 |
75010 | North Bay | 8390 | 23.71 | 58.99 | 14.86 | 2.38 | 0.06 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
77233 | Sudbury | 8647 | 22.26 | 60.54 | 14.95 | 2.07 | 0.10 | 0.02 | 0.01 | 0.02 | 0.01 | 0 | 0 | 1 |
Air quality forecast region | Special air quality statement | Smog and air health advisory |
---|---|---|
Algonquin | 1 | 0 |
Atikokan - Upsala - Quetico | 2 | 0 |
Attawapiskat | 1 | 0 |
Bancroft - Bon Echo Park | 1 | 0 |
Barrie - Orillia - Midland | 1 | 0 |
Belleville - Quinte - Northumberland | 2 | 0 |
Big Trout Lake - Sachigo Lake | 1 | 0 |
Brockville - Leeds and Grenville | 1 | 0 |
Burk's Falls - Bayfield Inlet | 1 | 0 |
Chapleau - Gogama | 1 | 0 |
City of Hamilton | 4 | 0 |
City of Ottawa | 1 | 0 |
City of Thunder Bay | 1 | 0 |
City of Toronto | 2 | 0 |
Cornwall - Morrisburg | 1 | 0 |
Dryden - Ignace | 2 | 0 |
Dufferin - Innisfil | 2 | 0 |
Dunnville - Caledonia - Haldimand | 2 | 0 |
Elgin | 2 | 0 |
Elliot Lake - Ranger Lake | 1 | 0 |
Fort Frances - Rainy Lake | 3 | 0 |
Fort Hope - Webequie | 1 | 0 |
Fort Severn | 1 | 0 |
Geraldton - Manitouwadge - Hornepayne | 1 | 0 |
Greater Sudbury and Vicinity | 1 | 0 |
Grey - Bruce | 1 | 0 |
Haliburton | 1 | 0 |
Halton - Peel | 2 | 0 |
Huron - Perth | 2 | 0 |
Kapuskasing - Hearst | 1 | 0 |
Kenora - Nestor Falls | 4 | 0 |
Kingston - Prince Edward | 2 | 0 |
Kirkland Lake - New Liskeard - Temagami | 1 | 0 |
Lake Nipigon - Wabakimi | 1 | 0 |
London - Middlesex | 2 | 0 |
Manitoulin - Northshore - Killarney | 1 | 0 |
Moosonee - Fort Albany | 1 | 0 |
Niagara | 2 | 0 |
Nipigon - Marathon - Superior North | 1 | 0 |
North Bay - West Nipissing | 1 | 0 |
Oxford - Brant | 2 | 0 |
Parry Sound - Muskoka | 1 | 0 |
Peawanuck | 1 | 0 |
Peterborough - Kawartha Lakes | 2 | 0 |
Pickle Lake - Wunnummin Lake | 2 | 0 |
Prescott and Russell | 1 | 0 |
Red Lake - Ear Falls | 4 | 0 |
Renfrew - Pembroke - Barry's Bay | 1 | 0 |
Sandy Lake - Pikangikum | 3 | 0 |
Sarnia - Lambton | 3 | 0 |
Sault Ste. Marie - Superior East | 1 | 0 |
Simcoe - Delhi - Norfolk | 2 | 0 |
Sioux Lookout - Savant Lake | 2 | 0 |
Smiths Falls - Lanark - Sharbot Lake | 1 | 0 |
Stirling - Tweed - South Frontenac | 2 | 0 |
Superior West | 1 | 0 |
Timmins - Cochrane | 1 | 0 |
Waterloo - Wellington | 2 | 0 |
Wawa - White River - Pukaskwa | 1 | 0 |
Windsor - Essex - Chatham - Kent | 2 | 0 |
York - Durham | 2 | 0 |
Ontario | 9 | 0 |
Roadside air monitoring in Ontario
2021 ultrafine particles annual statistics
Unit: particles per cubic centimetre (#/cm3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
34021 | Toronto North | 4905 Dufferin St., ECCC | 8657 | 3,527 | 6,011 | 8,556 | 12,040 | 18,780 | 35,376 | 10,261.7 | 77,780 | 25,821 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 8225 | 8,419 | 18,282 | 31,860 | 51,330 | 92,080 | 171,512 | 42,579.1 | 277,000 | 146,537 |
83133 | Toronto Island | 535 Lakeshore Ave., Hanlan's Point | 7026 | 2,060 | 3,657 | 5,206 | 7,338 | 12,145 | 23,925 | 6,415.1 | 55,900 | 14,756 |
2021 black carbon annual statistics
Unit: micrograms per cubic metre (µg/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 467 University Ave. W. | 8179 | 0.15 | 0.27 | 0.39 | 0.56 | 0.94 | 2.00 | 0.49 | 6.31 | 1.41 |
12016 | Windsor West | College Ave./South St. | 8635 | 0.16 | 0.27 | 0.40 | 0.56 | 0.97 | 2.12 | 0.50 | 4.76 | 1.54 |
29000 | Hamilton Downtown | Elgin St./Kelly St. | 8603 | 0.14 | 0.26 | 0.41 | 0.63 | 1.21 | 2.68 | 0.57 | 5.56 | 2.37 |
33003 | Toronto East | Kennedy Rd./Lawrence Ave. E. | 7097 | 0.12 | 0.23 | 0.34 | 0.50 | 0.89 | 1.77 | 0.44 | 3.52 | 1.60 |
34021 | Toronto North | 4905 Dufferin St., ECCC | 8735 | 0.12 | 0.21 | 0.34 | 0.52 | 0.96 | 2.13 | 0.47 | 5.15 | 1.99 |
35033 | Etobicoke South | 185 Judson St. | 8737 | 0.21 | 0.37 | 0.54 | 0.77 | 1.29 | 3.00 | 0.69 | 11.26 | 2.57 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 8577 | 0.31 | 0.56 | 0.87 | 1.40 | 2.46 | 4.59 | 1.18 | 7.71 | 3.88 |
83133 | Toronto Island | 535 Lakeshore Ave., Hanlan's Point | 8702 | 0.00 | 0.13 | 0.23 | 0.38 | 0.75 | 1.81 | 0.33 | 2.96 | 1.58 |
2021 iron in PM2.5 annual statistics
Unit: nanograms per cubic metre (ng/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | Elgin St./Kelly St. | 7682 | 15 | 30 | 49 | 83 | 233 | 862 | 104.0 | 3309 | 613.4 |
35033 | Etobicoke South | 185 Judson St. | 5116 | 21 | 40 | 63 | 95 | 173 | 441 | 87.6 | 3590 | 324.7 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 7565 | 47 | 94 | 171 | 317 | 582 | 1095 | 257.0 | 2262 | 654.6 |
2021 copper in PM2.5 annual statistics
Unit: nanograms per cubic metre (ng/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | Elgin St./Kelly St. | 7682 | 1.2 | 1.6 | 2.2 | 3.5 | 9.0 | 32.7 | 4.4 | 507.5 | 34.7 |
35033 | Etobicoke South | 185 Judson St. | 5116 | 2.0 | 2.7 | 3.3 | 4.1 | 6.3 | 24.1 | 4.4 | 426.5 | 57.4 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 7565 | 2.7 | 3.9 | 6.3 | 10.9 | 17.7 | 33.1 | 9.8 | 1646.0 | 209.1 |
2021 manganese in PM2.5 annual statistics
Unit: nanograms per cubic metre (ng/m3)
Mn in PM2.5 24h AAQC: 100 ng/m3
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
Number of times above 24h criteria |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | Elgin St./Kelly St. | 7682 | 0.0 | 0.3 | 0.8 | 1.7 | 6.4 | 51.2 | 3.4 | 529.7 | 35.3 | 0 |
35033 | Etobicoke South | 185 Judson St. | 5116 | 0.4 | 0.9 | 1.4 | 2.4 | 4.8 | 13.1 | 2.3 | 51.9 | 9.6 | 0 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 7565 | 0.9 | 1.8 | 2.7 | 4.1 | 7.2 | 16.0 | 3.6 | 102.6 | 17.2 | 0 |
2021 lead in PM2.5 annual statistics
Unit: nanograms per cubic metre (ng/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | Elgin St./Kelly St. | 7681 | 0.6 | 1.4 | 2.3 | 3.4 | 7.3 | 23.4 | 3.5 | 90.4 | 14.6 |
35033 | Etobicoke South | 185 Judson St. | 5115 | 0.4 | 0.8 | 1.4 | 2.3 | 4.8 | 26.5 | 2.8 | 174.3 | 27.0 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 7570 | 0.7 | 1.2 | 1.9 | 3.0 | 5.4 | 16.1 | 2.9 | 192.0 | 26.8 |
2021 selenium in PM2.5 annual statistics
Unit: nanograms per cubic metre (ng/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | Elgin St./Kelly St. | 7682 | 0.03 | 0.12 | 0.25 | 0.55 | 1.59 | 6.41 | 0.68 | 28.17 | 5.68 |
35033 | Etobicoke South | 185 Judson St. | 5116 | 0.00 | 0.05 | 0.20 | 0.47 | 1.42 | 5.98 | 0.60 | 29.06 | 3.93 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 7565 | 0.07 | 0.17 | 0.27 | 0.46 | 1.20 | 8.57 | 0.66 | 47.27 | 6.43 |
2021 zinc in PM2.5 annual statistics
Unit: nanograms per cubic metre (ng/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | Elgin St./Kelly St. | 7682 | 2.2 | 5.1 | 8.8 | 15.3 | 45.1 | 298.4 | 23.9 | 1,529 | 184.8 |
35033 | Etobicoke South | 185 Judson St. | 5116 | 2.7 | 5.5 | 9.0 | 14.7 | 30.5 | 105.7 | 15.1 | 780 | 64.5 |
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 7565 | 4.6 | 8.1 | 11.8 | 17.3 | 35.7 | 136.2 | 19.5 | 1,791 | 159.1 |
2021 organics in PM2.5 annual statistics
Unit: micrograms per cubic metre (µg/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 6481 | 1.1 | 2.0 | 3.1 | 4.5 | 7.7 | 17.7 | 3.94 | 50.7 | 23.57 |
2021 sulphate in PM2.5 annual statistics
Unit: micrograms per cubic metre (µg/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 6481 | 0.1 | 0.2 | 0.4 | 0.7 | 1.3 | 2.6 | 0.56 | 4.4 | 3.02 |
2021 nitrate in PM2.5 annual statistics
Unit: micrograms per cubic metre (µg/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 6481 | 0.1 | 0.2 | 0.4 | 0.8 | 2.9 | 11.1 | 1.14 | 18.7 | 15.17 |
2021 ammonium in PM2.5 annual statistics
Unit: micrograms per cubic metre (µg/m3)
ID | City | Location | Valid h | 10% | 30% | 50% | 70% | 90% | 99% | Mean | Maximum 1h |
Maximum 24h |
---|---|---|---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | Hwy 401 at 125 Resources Rd. | 6481 | 0.0 | 0.1 | 0.4 | 0.9 | 2.1 | 8.1 | 0.89 | 11.8 | 9.69 |
6-year trend for ultrafine particles
Annual mean (#/cm3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
34021 | Toronto North | 11953 | 12074 | 12293 | 10873 | 9056 | 10262 | -20.1 | SSS |
83126 | Toronto Hwy 401 | 43280 | 39053 | 37984 | 39831 | 40635 | 42579 | 11.5 | SSS |
83133 | Toronto Island | INS | INS | INS | 6693 | 6126 | 6415 | -12.3 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- SSS - Significant Sen's Slope (significant trend detected).
6-year trend for black carbon
Annual mean (µg/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
12008 | Windsor Downtown | 0.53 | 0.50 | 0.57 | 0.59 | 0.43 | 0.49 | -15.2 | Non-SSS |
12016 | Windsor West | 0.70 | 0.65 | 0.60 | 0.59 | 0.45 | 0.50 | -34.8 | SSS |
29000 | Hamilton Downtown | 0.51 | 0.71 | 0.72 | 0.67 | 0.57 | 0.57 | -4.6 | Non-SSS |
33003 | Toronto East | 0.62 | 0.62 | 0.45 | 0.45 | 0.45 | 0.44 | -33.9 | SSS |
34021 | Toronto North | 0.62 | 0.60 | 0.49 | 0.53 | 0.51 | 0.47 | -15.5 | Non-SSS |
35033 | Etobicoke South | 0.89 | 0.97 | 0.79 | 0.83 | 0.88 | 0.69 | -14.5 | SSS |
83126 | Toronto Hwy 401 | 1.62 | 1.51 | 1.31 | 1.43 | 1.20 | 1.18 | -23.3 | SSS |
83133 | Toronto Island | 0.44 | 0.35 | 0.37 | 0.37 | 0.34 | 0.33 | -22.0 | SSS |
Notes:
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
6-year trend for iron in PM2.5
Annual mean (ng/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | 116.6 | 116.9 | 105.9 | 106.9 | 88.3 | 104.0 | -19.4 | SSS |
35033 | Etobicoke South | 110.1 | 102.5 | 103.5 | 91.2 | 88.1 | 87.6 | -22.7 | SSS |
83126 | Toronto Hwy 401 | INS | 261.6 | 275.7 | INS | 288.6 | 257.0 | 1.6 | Non-SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
6-year trend for copper in PM2.5
Annual mean (ng/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | 4.7 | 4.8 | 4.2 | 4.0 | 3.5 | 4.4 | -18.8 | SSS |
35033 | Etobicoke South | 5.8 | 6.1 | 5.7 | 5.4 | 4.3 | 4.4 | -32.1 | SSS |
83126 | Toronto Hwy 401 | INS | 11.5 | 11.9 | INS | 10.2 | 9.8 | -20.6 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- SSS - Significant Sen's Slope (significant trend detected).
6-year trend for manganese in PM2.5
Annual mean (ng/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | 5.5 | 3.9 | 3.5 | 4.2 | 2.9 | 3.4 | -41.0 | SSS |
35033 | Etobicoke South | 2.8 | 3.1 | 2.5 | 2.4 | 2.3 | 2.3 | -27.5 | SSS |
83126 | Toronto Hwy 401 | INS | 3.7 | 3.7 | INS | 3.7 | 3.6 | -5.3 | Non-SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
6-year trend for lead in PM2.5
Annual mean (ng/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | 3.5 | 3.6 | 3.6 | 3.6 | 3.3 | 3.5 | -3.2 | Non-SSS |
35033 | Etobicoke South | 3.3 | 4.7 | 3.1 | 2.6 | 2.2 | 2.8 | -29.1 | Non-SSS |
83126 | Toronto Hwy 401 | INS | 3.5 | 3.2 | INS | 2.8 | 2.9 | -11.5 | Non-SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
6-year trend for selenium in PM2.5
Annual mean (ng/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | 0.61 | 0.59 | 0.67 | 0.62 | 0.58 | 0.68 | -3.2 | Non-SSS |
35033 | Etobicoke South | 0.61 | 0.63 | 0.43 | 0.49 | 0.54 | 0.60 | -8.0 | Non-SSS |
83126 | Toronto Hwy 401 | INS | 0.45 | 0.43 | INS | 0.59 | 0.66 | 56.2 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- SSS - Significant Sen's Slope (significant trend detected).
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
6-year trend for zinc in PM2.5
Annual mean (ng/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
29000 | Hamilton Downtown | 40.1 | 25.8 | 26.5 | 29.0 | 20.5 | 23.9 | -33.4 | SSS |
35033 | Etobicoke South | 21.6 | 24.4 | 18.5 | 17.7 | 16.0 | 15.1 | -36.9 | SSS |
83126 | Toronto Hwy 401 | INS | 24.2 | 22.3 | INS | 18.1 | 19.5 | -26.6 | SSS |
Notes:
- INS indicates there was insufficient data to calculate a valid annual mean.
- SSS - Significant Sen's Slope (significant trend detected).
6-year trend for organics in PM2.5
Annual mean (µg/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | 4.13 | 7.01 | 5.20 | 3.88 | 4.83 | 3.94 | -22.4 | Non-SSS |
Notes:
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
6-year trend for sulphate in PM2.5
Annual mean (µg/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | 0.91 | 1.12 | 0.66 | 0.65 | 0.67 | 0.56 | -34.6 | SSS |
Notes:
- SSS - Significant Sen's Slope (significant trend detected).
6-year trend for nitrate in PM2.5
Annual mean (µg/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | 1.31 | 1.71 | 1.65 | 1.20 | 1.38 | 1.14 | -10.6 | Non-SSS |
Notes:
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
6-year trend for ammonium in PM2.5
Annual mean (µg/m3)
ID | City/Town | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Change over 6 years (%) | Trend |
---|---|---|---|---|---|---|---|---|---|
83126 | Toronto Hwy 401 | 0.73 | 1.46 | 0.65 | 0.41 | 1.06 | 0.89 | -3.7 | Non-SSS |
Notes:
- Non-SSS - Non-Significant Sen's Slope (significant trend not detected).
Footnotes
- footnote[1] Back to paragraph This program ended in February 2021 when the regulations were revoked. See table of changes for more information.
- footnote[2] Back to paragraph Site-specific standard for sulphur dioxide ended on January 1, 2022 when O. Reg. 652/21: Air Pollution – Discharge of Sulphur Dioxide from Nickel Smelting and Refining Facilities in the Sudbury Area took effect. See table of changes since 2021 for more information.