The Appendix is intended for use in conjunction with the 2017 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 pollutants are displayed for a 10-year period.

Monitoring network operations

Network description

In 2017, the Ministry operated 39 ambient air monitoring sites across Ontario as part of the AQHI network. Monitoring site locations for the AQHI network are illustrated in Map A1. The AQHI network was comprised of 133 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 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 2017 ambient air quality monitoring network had greater than 99% 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 Ministry’s Open 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). An annual or monthly mean for 24-hour VOC samples requires 50% of valid samples.

Network descriptive table

The AQHI network for 2017 is summarized in Table A1. 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.

Table A1 also identifies the type of air monitoring site: ambient, road-side, 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 within approximately 100 m of a major roadway with daily traffic volumes greater than 10,000 vehicles per day.

Annual statistics and 10-year trends

The 2017 statistical data and 10-year trends for various continuous pollutants are provided in Tables A2-A9, and Tables A10-A18, respectively. 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 10-year 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 10-year 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 and ozone are presented for 2017 (based on a three-year average, 2015-2017) in Table A19. The percentage distribution of hourly AQHI readings within the various health risk categories for each of the 39 monitoring sites are displayed in Table A20. Table A21 summarizes the number of air quality alerts issued in Ontario during 2017. The 2017 statistical and 10-year trends for selected toxics are provided in Tables A22-A27, and Tables A28-A33, respectively.

Map A1: Air Quality Health Index (AQHI) monitoring sites across Ontario in 2017

Map depicting the Air Quality Health Index monitoring sites across Ontario in 2017

AQHI stations: Rural (6), Urban (33)

Tables

Table A1: 2017 Ontario continuous ambient air monitoring network

ID Station name Station location Year Latitude Longitude Air intake Type AQHI NO2 PM2.5 O3 SO2 CO TRS
12008 Windsor Downtown 467 University Ave. W. 1969 42°18'56.8" -83°02'37.2" 8 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/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
29114 Hamilton Mountain Vickers Rd./E. 18th St. 1985 43°13'45.9" -79°51'46.0" 3 A/C/N Y T T T T n/a n/a
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
31103 Toronto Downtown Bay St./Wellesley St. W. 2000 43°39'46.7" -79°23'17.2" 10 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. 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 Eighth Line/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
45026 Oshawa 2000 Simcoe St. N., Durham College 2005 43°56'45.4" -78°53'41.7" 7 A/RS/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 Mississauga 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
51002 Ottawa Central 960 Carling Ave. 2007 45°22'57.1" -75°42'51.1" 5 A/N Y T T T n/a n/a 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 10 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 = CAAQS, N = NAPS
AQHI
Air Quality Health Index site
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

Table A2: 2017 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. 8647 0 1 1 3 7 33 3.3 124 21
12016 Windsor West College Ave./South St. 8735 0 0 1 2 5 32 2.6 164 41
13001 Chatham 435 Grand Ave. W. 8678 0 0 1 2 5 18 1.9 71 14
14111 Sarnia 700 Christina St. N. 8667 0 1 1 1 3 14 1.5 74 12
15020 Grand Bend Point Blake Conservation Area 8649 0 0 0 1 1 2 0.3 7 1
15026 London 42 St. Julien St. 8690 0 0 0 1 2 16 1 77 14
16015 Port Stanley 43665 Dexter Line, Elgin Water T. Plant 8686 0 0 0 0 1 2 0.2 26 2
21005 Brantford 324 Grand River Ave. 8648 0 0 0 0 2 13 0.8 63 11
26060 Kitchener West Ave./Homewood Ave. 8679 0 0 0 1 2 19 1 91 25
27067 St. Catharines Argyle Cres., Pump Stn. 8705 0 0 0 1 2 22 1.2 68 15
28028 Guelph Exhibition St./Clark St. W. 8682 0 0 0 0 2 21 1.1 80 29
29000 Hamilton Downtown Elgin St./Kelly St. 8712 0 0 1 3 9 50 3.9 228 49
29114 Hamilton Mountain Vickers Rd./E. 18th St. 8683 0 0 0 1 3 15 1.2 85 13
29118 Hamilton West Main St. W./Hwy 403 8685 0 0 1 3 9 45 3.9 156 49
31103 Toronto Downtown Bay St./Wellesley St. W. 8678 0 1 1 2 6 25 2.7 83 30
33003 Toronto East Kennedy Rd./Lawrence Ave. E. 8691 0 1 2 4 9 43 4.4 149 34
34021 Toronto North 4905 Dufferin St. 8705 0 0 1 2 6 43 3 154 38
35125 Toronto West 125 Resources Rd. 8693 0 1 3 6 18 82 7.7 153 62
44008 Burlington North Shore Blvd. E./Lakeshore Rd. 8709 0 1 1 2 7 43 3.4 135 37
44017 Oakville Eighth Line/Glenashton Dr., Halton Res. 8666 0 0 1 1 3 22 1.7 85 27
45026 Oshawa 2000 Simcoe St. N., Durham College 8654 0 1 1 2 5 20 2.4 88 27
46090 Brampton 109 McLaughlin Rd. S. 8732 0 0 0 1 4 40 2.2 159 35
46108 Mississauga 3359 Mississauga Rd. N., U of T Campus 8698 0 0 0 1 4 40 2 115 32
47045 Barrie 83 Perry St. 8660 0 1 1 2 4 36 2.6 148 34
48006 Newmarket Eagle St. W./McCaffrey Rd. 8690 0 0 1 1 3 16 1.4 64 12
49005 Parry Sound 7 Bay St. 8686 0 0 0 1 1 7 0.5 23 4
51001 Ottawa Downtown Rideau St./Wurtemburg St. 8658 0 0 1 1 3 16 1.5 95 20
51002 Ottawa Central 960 Carling Ave. 8700 0 0 1 1 3 27 1.7 139 22
52023 Kingston 23 Beechgrove Lane 8650 0 0 0 0 1 7 0.6 49 8
54012 Belleville 2 Sidney St., Water Treatment Plant 8643 0 0 0 1 3 14 1.1 75 20
56051 Cornwall Bedford St./3rd St. W. 8666 0 0 0 1 2 17 1.2 127 19
59006 Peterborough 10 Hospital Dr. 8688 0 0 1 1 2 12 1.2 58 16
63203 Thunder Bay 421 James St. S. 8642 0 1 1 3 10 38 4.1 143 30
71078 Sault Ste. Marie Sault College 8691 0 0 1 1 3 11 1.3 54 7
75010 North Bay Chippewa St. W., Dept. National Defence 8748 0 1 1 1 3 17 1.6 62 19
77233 Sudbury 155 Elm St. 8644 0 1 1 2 5 33 2.5 130 35

Table A3: 2017 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 criterion Number of times above 24h criterion
12008 Windsor Downtown 467 University Ave. W. 8647 4 6 9 13 21 35 11.1 53 29 0 0
12016 Windsor West College Ave./South St. 8735 3 5 8 12 19 33 9.9 48 26 0 0
13001 Chatham 435 Grand Ave. W. 8678 3 4 5 7 11 21 6.1 41 19 0 0
14111 Sarnia 700 Christina St. N. 8667 2 3 6 9 16 27 7.3 44 23 0 0
15020 Grand Bend Point Blake Conservation Area 8649 1 2 3 4 6 10 3 19 11 0 0
15026 London 42 St. Julien St. 8690 2 3 4 6 11 23 5.8 40 19 0 0
16015 Port Stanley 43665 Dexter Line, Elgin Water T. Plant 8686 1 2 2 3 5 10 2.7 23 8 0 0
21005 Brantford 324 Grand River Ave. 8648 1 2 3 5 10 20 4.4 37 18 0 0
26060 Kitchener West Ave./Homewood Ave. 8664 2 3 4 6 12 25 5.8 40 19 0 0
27067 St. Catharines Argyle Cres., Pump Stn. 8703 2 3 5 7 14 27 6.6 40 24 0 0
28028 Guelph Exhibition St./Clark St. W. 8682 1 3 4 7 12 27 5.9 39 23 0 0
29000 Hamilton Downtown Elgin St./Kelly St. 8712 4 6 10 14 24 37 11.9 60 32 0 0
29114 Hamilton Mountain Vickers Rd./E. 18th St. 8683 2 4 6 9 17 30 7.8 41 22 0 0
29118 Hamilton West Main St. W./Hwy 403 8685 3 5 8 12 22 35 10.4 45 31 0 0
31103 Toronto Downtown Bay St./Wellesley St. W. 8678 5 8 11 15 24 38 13 50 34 0 0
33003 Toronto East Kennedy Rd./Lawrence Ave. E. 8691 3 6 9 13 23 39 11.5 55 34 0 0
34021 Toronto North 4905 Dufferin St. 8705 3 5 8 13 22 38 10.5 49 36 0 0
35125 Toronto West 125 Resources Rd. 8693 5 9 13 18 28 43 15 55 41 0 0
44008 Burlington North Shore Blvd. E./Lakeshore Rd. 8640 2 5 8 11 21 35 9.7 49 31 0 0
44017 Oakville Eighth Line/Glenashton Dr., Halton Res. 8666 2 4 6 9 18 33 8.2 56 38 0 0
45026 Oshawa 2000 Simcoe St. N., Durham College 8654 2 3 5 7 13 29 6.4 41 31 0 0
46090 Brampton 109 McLaughlin Rd. S. 8732 1 3 5 10 20 37 8.3 50 31 0 0
46108 Mississauga 3359 Mississauga Rd. N., U of T Campus 8698 2 4 6 9 17 32 8 50 35 0 0
47045 Barrie 83 Perry St. 8661 2 3 5 8 16 34 7.3 64 34 0 0
48006 Newmarket Eagle St. W./McCaffrey Rd. 8690 2 3 4 7 14 30 6.3 42 26 0 0
49005 Parry Sound 7 Bay St. 8686 1 1 2 3 6 16 2.7 35 14 0 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 8658 2 3 5 8 15 33 7.1 56 24 0 0
51002 Ottawa Central 960 Carling Ave. 8700 1 2 3 5 11 34 5.2 47 25 0 0
52023 Kingston 23 Beechgrove Lane 8650 1 2 3 5 9 22 4.4 48 23 0 0
54012 Belleville 2 Sidney St., Water Treatment Plant 8643 1 2 3 4 9 23 4.3 35 17 0 0
56051 Cornwall Bedford St./3rd St. W. 8666 1 2 3 5 11 30 5 54 27 0 0
59006 Peterborough 10 Hospital Dr. 8688 1 2 3 5 10 26 4.7 41 27 0 0
63203 Thunder Bay 421 James St. S. 8642 2 3 5 7 14 30 6.7 51 30 0 0
71078 Sault Ste. Marie Sault College 8691 1 2 3 5 9 21 4.4 44 20 0 0
75010 North Bay Chippewa St. W., Dept. National Defence 8748 1 2 3 4 10 31 4.6 42 25 0 0
77233 Sudbury 155 Elm St. 8644 2 3 4 7 15 43 6.8 58 33 0 0

Table A4: 2017 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. 8647 5 8 11 15 27 67 14.4 163 49
12016 Windsor West College Ave./South St. 8735 4 6 9 13 24 63 12.5 201 68
13001 Chatham 435 Grand Ave. W. 8678 3 4 6 9 15 35 8 107 31
14111 Sarnia 700 Christina St. N. 8667 2 4 6 10 18 38 8.7 101 33
15020 Grand Bend Point Blake Conservation Area 8649 1 2 3 4 6 11 3.4 20 11
15026 London 42 St. Julien St. 8690 2 3 5 7 13 35 6.8 93 31
16015 Port Stanley 43665 Dexter Line, Elgin Water T. Plant 8686 1 2 2 3 5 11 3 47 9
21005 Brantford 324 Grand River Ave. 8648 1 2 3 6 12 29 5.3 84 23
26060 Kitchener West Ave./Homewood Ave. 8664 2 3 4 7 14 41 6.9 124 42
27067 St. Catharines Argyle Cres., Pump Stn. 8703 2 4 5 8 16 44 7.9 94 36
28028 Guelph Exhibition St./Clark St. W. 8682 1 3 4 7 14 45 7 98 46
29000 Hamilton Downtown Elgin St./Kelly St. 8712 4 7 11 17 31 82 15.8 276 76
29114 Hamilton Mountain Vickers Rd./E. 18th St. 8683 2 4 6 10 19 42 9.1 120 35
29118 Hamilton West Main St. W./Hwy 403 8685 3 6 9 15 32 73 14.2 190 72
31103 Toronto Downtown Bay St./Wellesley St. W. 8696 6 9 12 17 30 59 15.7 122 63
33003 Toronto East Kennedy Rd./Lawrence Ave. E. 8691 4 8 12 17 32 78 15.8 189 66
34021 Toronto North 4905 Dufferin St. 8705 3 6 9 14 28 72 13.5 191 66
35125 Toronto West 125 Resources Rd. 8693 6 11 16 25 46 114 22.7 203 97
44008 Burlington North Shore Blvd. E./Lakeshore Rd. 8640 3 6 9 14 28 72 13.2 173 62
44017 Oakville Eighth Line/Glenashton Dr., Halton Res. 8666 3 4 6 10 21 52 9.9 135 65
45026 Oshawa 2000 Simcoe St. N., Durham College 8654 2 4 6 9 18 47 8.8 128 57
46090 Brampton 109 Mclaughlin Rd. S. 8732 2 3 6 11 24 71 10.6 195 64
46108 Mississauga 3359 Mississauga Rd. N., U of T Campus 8698 2 4 6 10 22 65 9.9 136 56
47045 Barrie 83 Perry St. 8661 3 4 6 9 20 64 9.9 212 68
48006 Newmarket Eagle St. W./McCaffrey Rd. 8690 2 3 5 8 16 41 7.8 92 38
49005 Parry Sound 7 Bay St. 8686 1 1 2 3 7 20 3.3 53 16
51001 Ottawa Downtown Rideau St./Wurtemburg St. 8658 2 4 6 9 17 47 8.6 132 32
51002 Ottawa Central 960 Carling Ave. 8700 2 3 4 6 14 57 7 185 41
52023 Kingston 23 Beechgrove Lane 8650 1 2 3 5 10 28 4.9 98 32
54012 Belleville 2 Sidney St., Water Treatment Plant 8643 1 2 3 5 12 35 5.4 102 32
56051 Cornwall Bedford St./3rd St. W. 8666 2 2 3 5 13 45 6.2 172 34
59006 Peterborough 10 Hospital Dr. 8688 2 3 4 6 11 35 5.8 91 43
63203 Thunder Bay 421 James St. S. 8642 3 4 7 11 24 63 10.8 194 60
71078 Sault Ste. Marie Sault College 8691 2 3 4 6 12 29 5.8 85 27
75010 North Bay Chippewa St. W., Dept. National Defence 8748 1 2 3 6 13 46 6.2 102 44
77233 Sudbury 155 Elm St. 8644 2 4 5 9 19 68 9.4 188 61

Table A5: 2017 fine particulate matter (PM2.5) annual statistics

Unit: micrograms per cubic metre (μg/m3)

PM2.5 24h reference level: 28 μg/m3

ID City Location Valid h 10% 30% 50% 70% 90% 99% Mean Max 1h Max 24h No. of times above 24h reference level
12008 Windsor Downtown 467 University Ave. W. 8705 3 5 6 9 15 26 7.8 44 30 1
12016 Windsor West College Ave./South St. 8639 3 5 7 10 16 29 8.5 48 32 1
13001 Chatham 435 Grand Ave. W. 8667 1 3 5 8 13 22 6.4 34 21 0
14111 Sarnia 700 Christina St. N. 8704 2 3 6 9 15 27 7 59 32 1
15020 Grand Bend Point Blake Conservation Area 8675 2 3 4 6 10 18 5.1 30 23 0
15026 London 42 St. Julien St. 8703 2 4 6 8 13 25 7 39 25 0
16015 Port Stanley 43665 Dexter Line, Elgin Water T. Plant 8640 2 3 5 8 12 23 6.3 34 22 0
18007 Tiverton 4th Concession/Bruce Rd. 23 8457 2 2 4 6 11 20 5.1 39 19 0
21005 Brantford 324 Grand River Ave. 8671 2 4 6 9 14 24 7.2 55 20 0
26060 Kitchener West Ave./Homewood Ave. 8622 1 3 5 8 14 28 7 42 23 0
27067 St. Catharines Argyle Cres., Pump Stn. 8509 2 4 6 8 13 25 7 51 28 0
28028 Guelph Exhibition St./Clark St. W. 8694 2 3 5 8 14 23 6.8 37 24 0
29000 Hamilton Downtown Elgin St./Kelly St. 8673 2 4 7 11 17 28 8.5 47 27 0
29114 Hamilton Mountain Vickers Rd./E. 18th St. 8727 2 4 6 9 14 27 7.4 51 25 0
29118 Hamilton West Main St. W./Hwy 403 8674 2 4 6 9 15 26 7.5 48 25 0
31103 Toronto Downtown Bay St./Wellesley St. W. 8644 2 4 6 9 14 26 7.4 82 28 0
33003 Toronto East Kennedy Rd./Lawrence Ave. E. 8716 2 4 6 9 14 25 7.4 40 27 0
34021 Toronto North 4905 Dufferin St. 8726 2 4 6 9 15 26 7.4 58 27 0
35125 Toronto West 125 Resources Rd. 8713 2 4 6 9 14 26 7.4 47 25 0
44008 Burlington North Shore Blvd. E./Lakeshore Rd. 8732 2 4 6 8 14 24 7 57 38 1
44017 Oakville Eighth Line/Glenashton Dr., Halton Res. 8687 2 3 5 8 14 25 6.9 40 24 0
45026 Oshawa 2000 Simcoe St. N., Durham College 8697 1 3 5 7 12 22 5.9 49 23 0
46090 Brampton 109 McLaughlin Rd. S. 8732 2 4 6 8 13 26 7 55 25 0
46108 Mississauga 3359 Mississauga Rd. N., U of T Campus 8711 1 3 6 9 14 25 6.8 44 25 0
47045 Barrie 83 Perry St. 8512 1 3 5 9 15 28 7 60 32 1
48006 Newmarket Eagle St. W./McCaffrey Rd. 8745 1 3 5 7 13 23 5.9 43 22 0
49005 Parry Sound 7 Bay St. 8734 1 2 3 5 10 19 4.6 37 20 0
49010 Dorset 1026 Bellwood Acres Rd. 8531 1 2 4 6 9 16 4.6 29 18 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 8727 2 3 5 7 11 21 5.9 42 28 0
51002 Ottawa Central 960 Carling Ave. 8723 2 3 5 7 11 22 5.8 69 27 0
51010 Petawawa Petawawa Research Forest Facility 8471 1 2 3 5 8 14 4.1 23 14 0
52023 Kingston 23 Beechgrove Lane 8616 1 3 4 6 11 18 5.3 38 19 0
54012 Belleville 2 Sidney St., Water Treatment Plant 8614 2 3 4 7 12 20 5.8 39 20 0
56051 Cornwall Bedford St./3rd St. W. 8486 1 3 5 7 12 24 5.9 47 26 0
59006 Peterborough 10 Hospital Dr. 8726 1 3 4 7 12 23 5.8 44 22 0
63203 Thunder Bay 421 James St. S. 8644 1 3 4 6 10 20 5.1 34 22 0
71078 Sault Ste. Marie Sault College 8718 2 3 4 6 10 18 5 33 16 0
75010 North Bay Chippewa St. W., Dept. National Defence 8721 2 3 4 5 9 15 4.6 31 13 0
77233 Sudbury 155 Elm St. 8335 1 3 4 6 10 19 5 39 15 0

Note:

Measurements taken by SHARP 5030.

The PM2.5 24-hour reference level of 28 µg/m3 is based on the 24-hour PM2.5 Canadian Ambient Air Quality Standard (CAAQS) established in 2015.

Table A6: 2017 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 No. of times above 1h criterion
12008 Windsor Downtown 467 University Ave. W. 8656 9 20 27 34 45 63 27.3 78 51 0
12016 Windsor West College Ave./South St. 8708 9 19 27 34 45 63 27 82 52 1
13001 Chatham 435 Grand Ave. W. 8679 15 23 29 35 44 61 29.5 90 57 2
14111 Sarnia 700 Christina St. N. 8676 13 22 28 34 43 61 28.4 80 54 0
15020 Grand Bend Point Blake Conservation Area 8679 17 25 31 36 44 62 31 82 59 4
15026 London 42 St. Julien St. 8686 9 22 29 35 44 62 28.1 78 58 0
16015 Port Stanley 43665 Dexter Line, Elgin Water T. Plant 8685 18 27 33 38 48 66 33 90 63 3
18007 Tiverton 4th Concession/Bruce Rd. 23 8549 19 27 33 38 44 61 32.4 82 63 1
21005 Brantford 324 Grand River Ave. 8650 9 22 29 35 44 62 28.3 74 60 0
26060 Kitchener West Ave./Homewood Ave. 8561 12 22 29 34 43 60 28.1 75 58 0
27067 St. Catharines Argyle Cres., Pump Stn. 8714 11 22 29 34 43 59 28.1 73 57 0
28028 Guelph Exhibition St./Clark St. W. 8680 10 22 29 35 44 61 28.4 76 60 0
29000 Hamilton Downtown Elgin St./Kelly St. 8712 8 19 26 32 41 59 25.6 73 59 0
29114 Hamilton Mountain Vickers Rd./E. 18th St. 8690 14 23 29 35 44 60 29.1 81 57 1
29118 Hamilton West Main St. W./Hwy 403 8679 5 18 26 32 41 60 25 74 61 0
31103 Toronto Downtown Bay St./Wellesley St. W. 8694 10 19 26 31 40 57 25.6 85 58 2
33003 Toronto East Kennedy Rd./Lawrence Ave. E. 8691 7 18 25 31 39 57 24.4 82 57 1
34021 Toronto North 4905 Dufferin St. 8717 6 17 24 30 40 59 24 82 59 1
35125 Toronto West 125 Resources Rd. 8675 4 14 22 29 39 57 22.1 82 59 2
44008 Burlington North Shore Blvd. E./Lakeshore Rd. 8708 9 21 28 34 43 59 27.1 88 61 4
44017 Oakville Eighth Line/Glenashton Dr., Halton Res. 8666 12 21 28 33 42 59 27.4 84 60 1
45026 Oshawa 2000 Simcoe St. N., Durham College 8664 11 22 28 34 42 63 27.9 86 60 3
46090 Brampton 109 McLaughlin Rd. S. 8733 9 21 28 34 42 60 27.2 75 60 0
46108 Mississauga 3359 Mississauga Rd. N., U of T Campus 8700 6 19 27 33 42 59 26.2 78 62 0
47045 Barrie 83 Perry St. 8640 9 20 27 33 40 54 25.9 75 53 0
48006 Newmarket Eagle St. W./McCaffrey Rd. 8691 12 22 28 34 42 58 27.9 85 58 2
49005 Parry Sound 7 Bay St. 8688 15 25 30 35 42 56 29.7 74 63 0
49010 Dorset 1026 Bellwood Acres Rd. 8619 8 21 28 34 42 54 26.9 69 52 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 8683 12 20 26 31 39 53 25.5 71 57 0
51002 Ottawa Central 960 Carling Ave. 8695 11 21 27 32 40 54 26.2 76 57 0
51010 Petawawa Petawawa Research Forest Facility 8738 10 20 27 32 40 51 25.8 65 57 0
52023 Kingston 23 Beechgrove Lane 8650 16 25 30 36 44 60 30.4 94 62 3
54012 Belleville 2 Sidney St., Water Treatment Plant 8701 14 24 30 36 45 62 30.2 86 63 4
56051 Cornwall Bedford St./3rd St. W. 8666 12 22 28 33 41 56 27.2 72 63 0
59006 Peterborough 10 Hospital Dr. 8685 14 23 29 35 43 59 28.9 80 60 0
63203 Thunder Bay 421 James St. S. 8635 6 18 25 30 37 45 23.4 51 44 0
71078 Sault Ste. Marie Sault College 8705 15 23 29 33 40 50 28.1 70 46 0
75010 North Bay Chippewa St. W., Dept. National Defence 8749 10 21 27 32 40 52 26.4 69 56 0
77233 Sudbury 155 Elm St. 8683 12 21 26 32 39 49 25.9 69 50 0

Table A7: 2017 sulphur dioxide (SO2) annual statistics

Unit: parts per billion (ppb)

SO2 1h AAQC: 250 ppb

SO2 24h AAQC: 100 ppb

SO2 1y AAQC: 20 ppb

ID City Location Valid h 10% 30% 50% 70% 90% 99% Mean Max 1h Max 24h No. of times above 1h criterion No. of times above 24h criterion No. of times above annual criterion
12008 Windsor Downtown 467 University Ave. W. 8683 0 0 0 1 3 12 1 33 7 0 0 0
12016 Windsor West College Ave./South St. 8735 0 0 0 1 2 9 0.9 28 9 0 0 0
14111 Sarnia 700 Christina St. N. 8748 0 0 0 0 4 30 1.7 72 26 0 0 0
29000 Hamilton Downtown Elgin St./Kelly St. 8707 0 0 1 2 10 41 3.5 86 23 0 0 0
29114 Hamilton Mountain Vickers Rd./E. 18th St. 8690 0 0 0 1 5 21 1.8 73 18 0 0 0
34021 Toronto North 4905 Dufferin St. 8728 0 0 0 0 0 2 0.1 8 2 0 0 0
35125 Toronto West 125 Resources Rd. 8686 0 0 0 1 1 3 0.5 11 3 0 0 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 8670 0 0 0 0 0 1 0.1 3 1 0 0 0
71078 Sault Ste. Marie Sault College 8693 0 0 0 0 1 13 0.7 43 9 0 0 0
77233 Sudbury 155 Elm St. 8691 0 0 0 0 3 23 1.3 119 14 0 0 0

Note:

The 2017 SO2 measurements are compared to the SO2 AAQC that was in effect in 2017. The province updated the SO2 1h AAQC (40 ppb) and annual AAQC (4 ppb) in 2018.

Table A8: 2017 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 No. of times above 1h criterion No. of times above 8h criterion
12008 Windsor Downtown 467 University Ave. W. 8661 0 0 0 0 0 1 0.2 2.58 0.86 0 0
29000 Hamilton Downtown Elgin St./Kelly St. 8656 0 0 0 0 0 1 0.2 2.13 0.75 0 0
34021 Toronto North 4905 Dufferin St. 8381 0 0 0 0 0 1 0.2 1 0.73 0 0
35125 Toronto West 125 Resources Rd. 8345 0 0 0 0 0 1 0.2 1.23 0.86 0 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 6971 0 0 0 0 0 0 0.2 0.67 0.48 0 0

Table A9: 2017 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. 8738 0 0 0 0 1 4 0.3 27 2
14111 Sarnia 700 Christina St. N. 8677 0 0 0 0 0 1 0 2 1
29000 Hamilton Downtown Elgin St./Kelly St. 8724 0 0 0 0 0 2 0.1 12 2
71078 Sault Ste. Marie Sault College 8690 0 0 0 0 0 1 0 3 1

Table A10: 10 year trend for NO

Annual mean (ppb)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 5.9 5.6 4.7 4.5 4.7 3.7 4 3.5 3.1 3.3 -28.4 SSS
12016 Windsor West 5.1 5.4 6.1 3.8 4.6 3.6 3.8 4.2 2.9 2.6 -44.6 SSS
13001 Chatham 3.1 3.5 2.6 1.9 1.8 1.6 1.5 1.7 1.4 1.9 -43.3 SSS
14111 Sarnia 3.2 2.8 2.2 3.1 2.1 1.7 1.9 2.4 INS 1.5 -38.4 SSS
15026 London 3.1 2.8 2.9 3.3 4.2 1.4 1.3 1.4 1 1 -65.1 SSS
21005 Brantford 1.3 1.7 1.3 1.2 1.1 1.2 0.9 1.3 0.8 0.8 -34.2 SSS
26060 Kitchener 2.5 2.1 2.5 2 2.1 1.6 1.6 1.6 1.3 1 -26.8 SSS
27067 St. Catharines 3.6 3.7 2.8 2.3 2.5 2.2 1.7 2.1 1.5 1.2 -44.9 SSS
28028 Guelph n/a n/a 2 2.3 2.2 1.1 1.2 1.3 1.1 1.1 -54.7 SSS
29000 Hamilton Downtown 6.5 5.8 5 4.8 4.6 4.3 3.9 1.3 4.2 3.9 -24.4 SSS
29114 Hamilton Mountain 2.4 2.5 2.2 2.3 1.9 2 2 1.8 1.2 1.2 -40.8 SSS
31103 Toronto Downtown 5 5.1 4.1 3.4 2.8 2.7 2.5 2.7 2.6 2.7 -43.6 SSS
33003 Toronto East 9.2 7.8 7.8 7.6 6.6 5.7 6.2 5.8 5.4 4.4 -33.6 SSS
34021 Toronto North 7.7 7.1 5.7 6.2 5 4.1 4.3 3.9 3.5 3 -46 SSS
35125 Toronto West 16.2 13.5 13.4 12.4 11.3 8.6 9.5 9.2 8.2 7.7 -39.8 SSS
44008 Burlington 6.5 5.9 5 4.6 4.6 4.6 4.6 3.9 3.9 3.4 -32.3 SSS
44017 Oakville 4 3.5 3.6 2.7 3.4 2.1 3.4 2.7 1.8 1.7 -45.9 SSS
45026 Oshawa 3.2 3 2.3 2.3 2.1 1.5 2 2.3 2.5 2.4 -8.6 N-SSS
46090 Brampton 5.8 6.5 3.7 4.6 4.4 4.6 4 3.8 3.4 2.2 -34.9 SSS
46108 Mississauga 6.1 5.1 4.1 4.1 3.8 3.1 2.9 3.1 3.6 2 -34.1 SSS
47045 Barrie 5.5 5.1 4.3 3.8 3.2 3.2 3.7 3.5 3.7 2.6 -22.4 SSS
48006 Newmarket 2.6 3.2 2.3 2.2 2 1.5 1.4 1.7 1.6 1.4 -40.6 SSS
51001 Ottawa Downtown 2.7 2.4 1.6 1.8 2.4 2.1 1.9 2 1.7 1.5 -10.3 SSS
51002 Ottawa Central 2.7 1.8 1.4 1.5 2 2.8 1 1.6 1.5 1.7 -1.3 N-SSS
52023 Kingston 1.1 0.6 0.3 0.5 0.4 0.2 0.8 0.9 0.7 0.6 0.6 N-SSS
54012 Belleville 3 1.9 2.3 2.3 1.6 1.7 1.2 1.5 1.8 1.1 -40.8 SSS
56051 Cornwall 3.6 3.2 2 1.9 2.2 1.9 1.5 1.8 2.1 1.2 -26.4 SSS
59006 Peterborough 3 1.9 1.7 2.2 1.8 1.7 1.8 1.5 1.3 1.2 -24.3 SSS
63203 Thunder Bay 5.1 5.7 4.6 5.9 5.1 4.7 4.2 5.2 3.8 4.1 -21.8 SSS
71078 Sault Ste. Marie 1.4 1.8 1.9 2 1.7 1.3 2 1.7 1 1.3 -37.9 SSS
75010 North Bay 3.8 4.2 3.4 4 2.9 2.5 2.6 2.1 2 1.6 -52.5 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 34021 replaced station 34020 as the Toronto North site in 2017.

Station 46090 replaced station 46089 as the Brampton site in 2017.

Station 46108 replaced station 46109 as the Mississauga site in 2008.

Station 52023 replaced station 52022 as the Kingston site in 2014.

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A11: 10 year trend for NO2

Annual mean (ppb)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 15.2 14.4 15.6 14.5 13.2 12.4 14 12.7 11.4 11.1 -24.4 SSS
12016 Windsor West 16.2 13.2 14.5 12.9 11.4 11.5 11.8 11.4 10.6 9.9 -28 SSS
13001 Chatham 7 7.5 6.4 6.6 5.7 6 6.8 6.8 5.4 6.1 -9.1 SSS
14111 Sarnia 10.8 8.2 8 8.6 8.6 8.1 9 9.3 INS 7.3 -11.6 SSS
15026 London 10.8 9 8.8 8.3 6.3 6.4 6.9 6.6 5.4 5.8 -35.2 SSS
21005 Brantford 6.9 7.3 5.8 6.1 5.4 4.8 5.5 5.5 4.8 4.4 -28.6 SSS
26060 Kitchener 9 8.6 7.7 7.7 7.1 6.7 7 6.8 6.2 5.8 -24.4 SSS
27067 St. Catharines 10.4 9.9 9.1 8.5 8.1 7.7 7.3 7.3 6.6 6.6 -31.3 SSS
28028 Guelph n/a n/a 6.7 7.3 6.5 6.6 7.1 6.3 6.2 5.9 -11.3 SSS
29000 Hamilton Downtown 14.7 13.6 12.7 13.5 11.9 12.4 12.4 12.2 11.9 11.9 -13.3 SSS
29114 Hamilton Mountain 10.5 9.9 8.9 9.9 8.6 9 9.3 9 7.9 7.8 -18.3 SSS
31103 Toronto Downtown 17 16.5 16.1 14.9 13.4 13.5 14 13.4 13.3 13 -21.1 SSS
33003 Toronto East 16.5 14.9 14.8 15.2 14 13.6 14.2 13.9 12.1 11.5 -21.8 SSS
34021 Toronto North 16.5 15.8 14.3 15.4 13.4 12.9 13.4 12.9 12 10.5 -28.3 SSS
35125 Toronto West 20.8 19 20.1 19.1 16.3 16.1 17.1 16.6 15.7 15 -25.1 SSS
44008 Burlington 13.6 12.5 12.2 11.8 11 11 10.9 10.4 10.2 9.7 -21.2 SSS
44017 Oakville 12 11.1 9.2 10.3 9.1 9.2 8.2 7.5 8.2 8.2 -29.3 SSS
45026 Oshawa 8.5 7.4 7.2 7 5.6 5.9 6.8 6.6 6.3 6.4 -16.2 SSS
46090 Brampton 13.1 13.3 10.7 11.3 10.4 9.1 10.6 9.9 9.7 8.3 -26.5 SSS
46108 Mississauga 12.3 12.2 10.4 10.6 9.6 9.5 9.2 9.2 8.6 8 -27.7 SSS
47045 Barrie 10.8 9.9 8.7 8.6 8.1 7.8 8.1 7.4 8.1 7.3 -19.8 SSS
48006 Newmarket 8 7.8 7.2 8.1 7.2 6.8 6.8 6.8 6.5 6.3 -18.4 SSS
51001 Ottawa Downtown 11.4 8.6 7.4 7.9 7.8 7.9 7.4 7.4 6.9 7.1 -18.8 SSS
51002 Ottawa Central 8.1 6.6 6.2 6.6 6.6 6.6 6 5.8 5.6 5.2 -19.2 SSS
52023 Kingston 5.5 5 4.3 4.6 4 3.6 3.9 4.4 4.4 4.4 -18.1 SSS
54012 Belleville 7.3 6 5.5 6.3 4.7 4.7 4.5 4.8 5.1 4.3 -28.8 SSS
56051 Cornwall 7.5 7.3 6.5 6.5 6.1 6.2 5.6 5.3 5.5 5 -27.1 SSS
59006 Peterborough 7 5.6 5 4.3 3.7 5 5.3 5.1 4.5 4.7 -12.1 SSS
63203 Thunder Bay 8.1 8.4 7.8 8.6 7.3 7.3 7.8 7.5 7.1 6.7 -17.2 SSS
71078 Sault Ste. Marie 5.5 5.1 5.5 5.3 4.8 5 5.3 4.8 4 4.4 -21.6 SSS
75010 North Bay 7.5 8.2 7.6 7.4 6.1 5.8 5.6 5.6 4.7 4.6 -42.5 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 34021 replaced station 34020 as the Toronto North site in 2017.

Station 46090 replaced station 46089 as the Brampton site in 2017.

Station 46108 replaced station 46109 as the Mississauga site in 2008.

Station 52023 replaced station 52022 as the Kingston site in 2014.

SSS - Significant Sen's Slope (significant trend detected).

Table A12: 10 year trend for NOX

Annual mean (ppb)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 21.1 20 20.2 18.9 17.8 16.2 18 16.2 14.5 14.4 -26.4 SSS
12016 Windsor West 21.3 18.6 20.6 16.7 16 15.2 15.7 15.5 13.5 12.5 -33.7 SSS
13001 Chatham 10.1 10.9 9 8.4 7.5 7.7 8.2 8.5 6.8 8 -25.5 SSS
14111 Sarnia 13.9 11 10.2 11.7 10.7 9.8 10.9 11.7 INS 8.7 -18.4 SSS
15026 London 13.9 11.9 11.7 11.6 10.5 7.8 8.3 8 6.5 6.8 -43.8 SSS
21005 Brantford 8.2 9.1 7.2 7.3 6.7 5.7 6.4 6.8 5.7 5.3 -31.9 SSS
26060 Kitchener 11.5 10.8 10.3 9.6 9.2 8.3 8.5 8.4 7.5 6.9 -25.7 SSS
27067 St. Catharines 14 13.7 11.8 10.9 10.6 9.9 9.1 9.4 8.2 7.9 -35.1 SSS
28028 Guleph n/a n/a 8.6 9.5 8.8 7.8 8.4 7.7 7.3 7 -21.5 SSS
29000 Hamilton Downtown 21.2 19.5 17.8 18.3 16.6 16.8 16.3 7.7 16.1 15.8 -16.5 SSS
29114 Hamilton Mountain 12.9 12.4 11.2 12.2 10.5 11 11.3 10.9 9.2 9.1 -21.2 SSS
31103 Toronto Downtown 22.1 21.6 20.3 18.4 16.2 16.1 16.5 16.1 15.9 15.7 -25.5 SSS
33003 Toronto East 25.7 22.7 22.6 22.8 20.6 19.4 20.4 19.7 17.5 15.8 -25.2 SSS
34021 Toronto North 24.3 22.8 20 21.5 18.5 17 17.7 16.9 15.4 13.5 -34.9 SSS
35125 Toronto West 37 32.5 33.5 31.5 27.6 24.7 26.5 25.7 23.8 22.7 -32 SSS
44008 Burlington 20 18.4 17.2 16.4 15.6 15.6 15.5 14.3 14.2 13.2 -26.3 SSS
44017 Oakville 16.1 14.6 12.8 13 12.6 11.2 11.6 10.1 10.1 9.9 -32 SSS
45026 Oshawa 11.7 10.4 9.5 9.2 7.8 7.4 8.8 8.9 8.8 8.8 -15.5 SSS
46090 Brampton 18.9 19.9 14.4 15.9 14.8 13.9 14.6 13.7 13.1 10.6 -29.3 SSS
46108 Mississauga 18.4 17.3 14.5 14.7 13.4 12.6 12.1 12.3 12.2 9.9 -31 SSS
47045 Barrie 16.3 15.1 13.1 12.4 11.3 11 11.8 10.9 11.9 9.9 -19.7 SSS
48006 Newmarket 10.4 11 9.5 10.3 9.2 8.4 8.2 8.5 8.1 7.8 -23.9 SSS
51001 Ottawa Downtown 14 11 9 9.7 10.2 10.1 9.3 9.5 8.6 8.6 -18.6 SSS
51002 Ottawa Central 10.8 8.4 7.5 8.1 8.7 9.4 7.1 7.5 7.2 7 -12.8 SSS
52023 Kingston 6.5 5.7 4.7 5.3 4.6 3.8 4.8 5.3 5.2 4.9 -17.6 SSS
54012 Belleville 10.2 7.9 7.8 8.7 6.4 6.3 5.7 6.2 6.7 5.4 -32.1 SSS
56051 Cornwall 11.1 10.6 8.5 8.4 8.4 8 7 7.1 7.6 6.2 -27.3 SSS
59006 Peterborough 10 7.5 6.7 6.6 5.4 6.6 7.1 6.6 5.9 5.8 -15.3 SSS
63203 Thunder Bay 13.2 14.1 12.4 14.5 12.4 12 11.9 12.7 11 10.8 -18.1 SSS
71078 Sault Ste. Marie 6.9 6.9 7.4 7.2 6.4 6.3 7.3 6.6 5.1 5.8 -24.4 SSS
75010 North Bay 11.3 12.4 11 11.5 9.1 8.3 8.1 7.8 6.7 6.2 -47 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 34021 replaced station 34020 as the Toronto North site in 2017.

Station 46090 replaced station 46089 as the Brampton site in 2017.

Station 46108 replaced station 46109 as the Mississauga site in 2008.

Station 52023 replaced station 52022 as the Kingston site in 2014.

SSS - Significant Sen's Slope (significant trend detected).

Table A13: 10 year trend for PM2.5

Annual mean (μg/m3)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 10.3 9 9.4 9.4 9.8 9.2 10.1 9.3 8.1 7.8 -15.2 SSS
12016 Windsor West 10.9 9.4 9.6 9.7 9.5 10 10.7 9.9 8.5 8.5 -12.2 SSS
13001 Chatham 9.2 8 8.1 8.2 7.5 8.1 8.6 8.1 6.6 6.4 -17.9 SSS
14111 Sarnia 14.1 12.2 12.7 12.9 12.7 8.5 9 8.4 INS 7 -50.2 SSS
15020 Grand Bend 8.6 7.4 7.8 7.6 7.4 7.3 8.1 7.7 6 5.1 -27.2 SSS
15026 London 8.6 7.3 7.8 7.7 8.1 9.1 8.8 8.3 7.1 7 -8.8 N-SSS
16015 Port Stanley 8.4 7.2 7.4 7.5 7.4 7.4 8.2 8 6.5 6.3 -12.7 SSS
18007 Tiverton 6.5 5.3 5.7 6 6 5.8 6.5 6.4 5.1 5.1 -11.1 SSS
21005 Brantford 8.6 7.4 8 8.2 7.8 8.5 9.2 8.7 7.3 7.2 -3.1 N-SSS
26060 Kitchener 9 7.4 7.8 7.7 7.7 8.7 9.3 8.8 7.3 7 -4.9 N-SSS
27067 St. Catharines 9.3 7.7 8 7.8 7.9 8.5 8.8 8.4 6.9 7 -8.5 SSS
28028 Guelph 8.2 7.1 7 7.4 7.4 8.1 8.9 8.4 6.9 6.8 -1.6 N-SSS
29000 Hamilton Downtown 10.4 8.6 9.4 10 10.2 10.1 10.8 10.2 8.2 8.5 -11 SSS
29114 Hamilton Mountain 9.2 8 7.6 8.3 8.1 9.2 9.4 9 7.2 7.4 -11.1 N-SSS
29118 Hamilton West 9.6 7.8 8.3 8.8 9 9.6 9.9 9.9 7.9 7.5 -6.7 N-SSS
31103 Toronto Downtown 8.4 7.1 7.5 7.9 8 8.3 8.7 8.4 7 7.4 -3.1 N-SSS
33003 Toronto East 8.5 7.4 8.3 7.8 7.8 8.2 8.9 8.5 7 7.4 -7.1 N-SSS
34021 Toronto North 9.1 7.7 7.7 9.5 9 8.3 9.2 9.4 7.3 7.4 -10.1 N-SSS
35125 Toronto West 9.4 7.8 8.1 8.7 8.8 8.8 9.1 8.5 7 7.4 -13.8 SSS
44008 Burlington 8.7 7.5 7.7 7.8 8 8.7 9.6 9.4 7.6 7 -3.6 N-SSS
44017 Oakville 8.5 6.9 7 8 7.6 8 8.5 8.3 7 6.9 -4.4 N-SSS
45026 Oshawa 8 6.7 7 6.9 6.9 7.4 7.7 7.5 5.9 5.9 -14.7 SSS
46090 Brampton 8.6 7.2 7.2 7.6 7.2 8.5 8.9 8.4 6.8 7 -1.1 N-SSS
46108 Mississauga 8.9 7.4 7.6 7.7 7.5 7.9 8.7 8.5 7.2 6.8 -11.5 SSS
47045 Barrie 7.8 6.8 6.8 7.2 7.1 7.5 7.6 7.6 6.5 7 -2.2 N-SSS
48006 Newmarket 7.6 6.5 6.8 6.9 7.1 7.3 7.3 7.1 6 5.9 -11.3 SSS
49005 Parry Sound 6.1 5.2 5.5 6 6 5.8 5.8 5.7 4.8 4.6 -18.3 SSS
49010 Dorset 5.9 4.8 5.1 5.4 5.3 5.4 5.3 5.6 4.6 4.6 -8.9 SSS
51001 Ottawa Downtown 6.9 6.1 5.7 6.3 6.2 7 7 6.9 5.9 5.9 -3 N-SSS
51002 Ottawa Central 6.6 5.8 5.5 5.9 6.5 7.1 6.8 6.9 5.6 5.8 0 N-SSS
51010 Petawawa 5.2 4.2 4.2 4.5 4.8 4.8 4.7 4.8 4.4 4.1 -6.4 N-SSS
52023 Kingston 8.8 8.1 8 8.5 8.3 6.5 6.8 6.3 5.8 5.3 -37.4 SSS
54012 Belleville 7.8 6.4 5.6 6.2 6.5 6.9 6.8 6.6 5.5 5.8 -13.9 SSS
56051 Cornwall 7.8 7 7 7.3 6.9 7.7 7 6.9 6.4 5.9 -17.1 SSS
59006 Peterborough 7.7 6.4 6.3 7 6.3 7.4 6.9 6.8 5.8 5.8 -16.4 SSS
63203 Thunder Bay 5.7 5.1 5.4 6.2 5.4 6.3 6.6 6.5 4.9 5.1 1.2 N-SSS
71078 Sault Ste. Marie 5.8 5.3 5.2 5.7 5.6 5.6 6 5.9 4.9 5 -6.9 N-SSS
75010 North Bay 6.1 5.1 4.9 5.5 5.3 5.2 5.3 5.3 4.6 4.6 -13.5 SSS
77233 Sudbury 5.5 4.5 4.7 5.2 5.1 5.7 6 6.3 5.4 5 15.3 SSS

Notes:

From 2008-2012, 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 34021 replaced station 34020 as the Toronto North site in 2017.

Station 46090 replaced station 46089 as the Brampton site in 2017.

Station 46108 replaced station 46109 as the Mississauga site in 2008.

Station 52023 replaced station 52022 as the Kingston site in 2014.

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A14: 10 year trend for O3

Annual mean (ppb)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 26.9 24.8 28 27.2 28 26.9 26 27 27.7 27.3 4.3 N-SSS
12016 Windsor West 25.9 24.9 26.7 26.4 28 26.7 27.2 26.5 27.7 27 7.6 SSS
13001 Chatham 30.9 28.8 31.9 29.7 29.5 29.6 29.3 29.6 29.6 29.5 -3.9 N-SSS
14111 Sarnia 28.7 26.6 30.7 29.7 29.7 28.6 27.1 27.8 28.8 28.4 -1.4 N-SSS
15020 Grand Bend 31.3 29.6 35 32.8 33.2 32.3 31 30.4 30.7 31 -4.1 N-SSS
15026 London 27 25.1 28.2 26.8 27.7 28.7 28.1 27.9 28.2 28.1 8.3 SSS
16015 Port Stanley 34.3 30.9 34.6 32.8 33.1 33.9 32.3 32.8 32.9 33 0.3 N-SSS
18007 Tiverton 32.6 31.4 33.8 32.1 32 32.4 31.8 32.5 33.1 32.4 1.4 N-SSS
21005 Brantford 28.4 26.5 29.4 28.7 28.8 29 29.4 28.9 29.5 28.3 3.9 N-SSS
26060 Kitchener 28.1 27 29.4 27.6 28 28 27.3 27.9 28.8 28.1 3.1 N-SSS
27067 St. Catharines 27.5 25.6 28.3 28 28.7 28.6 28.5 28.6 29.8 28.1 8.7 SSS
28028 Guelph 27.9 27.3 30.7 28.9 28.8 29 27.8 27.7 28.7 28.4 0.8 N-SSS
29000 Hamilton Downtown 25.1 24.3 26.9 25.4 25.7 25 25.3 25.9 26.7 25.6 5.5 N-SSS
29114 Hamilton Mountain 29 27.2 29.7 28.8 30.2 29.5 29.1 29.4 29.5 29.1 4.3 N-SSS
29118 Hamilton West 23.3 21.8 24.5 24.2 24.2 24.4 22.7 23.9 24.4 25 5.5 N-SSS
31103 Toronto Downtown 26 24.6 26.1 25.4 26.6 26.2 25.7 25.7 25.6 25.6 1 N-SSS
33003 Toronto East 21.6 22.1 23 23.3 24.6 24.1 23.4 23.5 25.5 24.4 13.7 SSS
34021 Toronto North 22.7 22.1 24.8 23.6 25.7 25.3 25.3 25.7 25.9 24 13.4 SSS
35125 Toronto West 20.7 19.5 20.6 20.1 21.5 21.5 21.1 21.3 22.1 22.1 12.5 SSS
44008 Burlington 24.9 24.1 26.6 25.9 26.7 26.4 25.5 26.5 27.6 27.1 11.9 SSS
44017 Oakville 27 25.5 28 26.8 27.7 28.3 27.2 27.4 27.1 27.4 3.9 N-SSS
45026 Oshawa 27 25.5 28 26.6 27 27.2 27.2 26.2 27.2 27.9 4 N-SSS
46090 Brampton 26.6 25.2 27.5 26.1 26.6 26.7 26.5 26.5 27.1 27.2 4.6 N-SSS
46108 Mississauga 24.6 24 25.9 24.1 25.6 25.2 25.4 25.4 26 26.2 9 SSS
47045 Barrie 26.5 24.3 26.8 25.3 26.3 25.5 25.6 25.4 25.9 25.9 2.2 N-SSS
48006 Newmarket 29.5 28.6 31.5 27.8 29.4 28.7 28.6 28.5 28.6 27.9 -3.4 N-SSS
49005 Parry Sound 32.1 29.7 31.3 29.7 30.1 30.4 29.6 30.4 29.6 29.7 -3.1 N-SSS
49010 Dorset 29.3 27.7 28.6 27 28 28.1 27.7 27 27.4 26.9 -4 SSS
51001 Ottawa Downtown 23.3 23.4 25.7 24.2 26 25.6 24.8 25.6 25.6 25.5 9.8 SSS
51002 Ottawa Central 27.4 24.7 26.6 24.8 25.6 26.6 26.6 27 25.5 26.2 -0.2 N-SSS
51010 Petawawa 27.6 27.3 27.9 26.7 27.7 27.6 26.8 26.7 26.4 25.8 -5.2 SSS
52023 Kingston 32.7 30.3 32.6 30.3 32.7 30.3 31.4 30.3 30.5 30.4 -2.9 N-SSS
54012 Belleville 29.8 28.5 30 27.9 28 29.2 29.6 29.6 30.5 30.2 6.2 SSS
56051 Cornwall 26.6 25.5 27.9 26.1 27.1 26.9 27.3 27.9 27.1 27.2 2.7 N-SSS
59006 Peterborough 28.2 27.7 30.5 27.9 29.1 28.6 29.2 29.3 29.7 28.9 5.3 SSS
63203 Thunder Bay 23 24.2 25.7 25.2 25 26.3 23.4 24 23.2 23.4 -6.6 SSS
71078 Sault Ste. Marie 28.9 27.8 28.4 27.8 28.8 28.9 28.4 27.8 27.3 28.1 -3.4 N-SSS
75010 North Bay 27.7 26.1 28 26.7 26.1 27.4 26.7 27 26.4 26.4 -0.9 N-SSS
77233 Sudbury 27.9 25.9 28.7 28.7 28.5 27.2 26.3 25.7 25.1 25.9 -8.8 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 34021 replaced station 34020 as the Toronto North site in 2017.

Station 46090 replaced station 46089 as the Brampton site in 2017.

Station 46108 replaced station 46109 as the Mississauga site in 2008.

Station 52023 replaced station 52022 as the Kingston site in 2014.

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A15: 10 year trend for O3 summer means (May - September)

Summer Mean (ppb)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 34.1 30.4 34.6 33.8 36.8 32.5 30.9 33.3 33.4 32.8 -3 N-SSS
12016 Windsor West 32.1 29.5 31.8 31.9 35.7 30.9 30.9 31.8 33 31.8 -0.1 N-SSS
13001 Chatham 36.7 32.6 36.5 34.4 36.6 34.2 32.4 34.4 32.9 33.1 -8.1 N-SSS
14111 Sarnia 33 28.6 34.3 32.9 36.6 32 29.4 31.1 32.1 32 -4.1 N-SSS
15020 Grand Bend 32.4 29.7 37.8 33.9 38.9 33.1 31.5 32.3 32 32.1 -4.2 N-SSS
15026 London 31.6 28.4 32.5 30.7 34.4 30.9 29.5 31 30.4 29.8 -4.4 N-SSS
16015 Port Stanley 38.8 33.2 38.9 35.5 38.4 36.9 33.7 35.6 35.2 35 -9 N-SSS
18007 Tiverton 34 30.3 33.3 31.7 36 32.5 30.8 33.3 34.1 32.2 0.2 N-SSS
21005 Brantford 31 27.5 31.6 31.1 33.5 30.1 29.9 31.2 32.2 29.4 0.5 N-SSS
26060 Kitchener 31 28.8 31.6 30.2 33.5 29.8 28.5 30.2 31.8 29.8 -1.9 N-SSS
27067 St. Catharines 31.2 27.7 32 31.2 35 31.2 29.5 31.7 33.2 29.8 1.8 N-SSS
28028 Guelph 30.4 28.7 32.5 31.3 34.5 30.4 28.9 30.2 31.2 29.6 -2.4 N-SSS
29000 Hamilton Downtown 29.8 28.2 31.6 28.7 32.4 28.4 27.5 29.5 30.6 27.8 -4.3 N-SSS
29114 Hamilton Mountain 33.6 31 34.4 32.3 37.4 32.5 31.6 33.9 33.2 31.5 -2.7 N-SSS
29118 Hamilton West 26.7 23.9 27.9 26.2 29.2 26.4 22.7 26.5 27.1 26.8 1.5 N-SSS
31103 Toronto Downtown 30.9 27.9 31.1 29.5 33.3 30.1 28.9 30.8 29.6 28.4 -4.8 N-SSS
33003 Toronto East 24.9 25.2 26.7 27.4 30.6 27.1 25.9 27.7 29.7 26 10.3 N-SSS
34021 Toronto North 26.4 25.6 28 27.5 32.7 29.4 28.6 30.7 30.7 26.3 15.2 N-SSS
35125 Toronto West 24.8 22.5 24.3 23.6 27.5 24.4 23.5 25 25.9 24.3 4.7 N-SSS
44008 Burlington 28.3 26.7 30.2 29.2 32.5 29.2 27.4 30.1 30.5 29 5.8 N-SSS
44017 Oakville 30.8 28.2 31.5 29.9 34.2 30.6 28.3 30.2 29.9 29.5 -4.3 N-SSS
45026 Oshawa 28.3 26.4 29.5 28.5 31.1 28.3 27.9 28.9 29.4 28.6 2.5 N-SSS
46090 Brampton 31 28.5 30.8 29.3 32.7 29.5 28.9 30.3 31.2 29.5 0.7 N-SSS
46108 Mississauga 27.3 26.2 29 26.7 30.4 26.5 26.5 28 28.5 27.2 2.6 N-SSS
47045 Barrie 30 25 27.9 26.2 29.7 25.6 25.4 26.8 27.4 25.6 -6.2 N-SSS
48006 Newmarket 32.1 30.9 34.4 30.5 34.2 30.3 29.4 31.2 31.7 29 -7.2 N-SSS
49005 Parry Sound 32.2 28.6 30.4 28.7 32.8 30.1 28.2 31.4 28.9 27.7 -4.5 N-SSS
49010 Dorset 27.2 25 25.2 23.8 28.3 25.3 24.4 24.6 25.1 23 -8.3 N-SSS
51001 Ottawa Downtown 24.9 24.6 26.1 25.1 29.3 26.5 24.6 27.8 27.5 25.3 8.2 N-SSS
51002 Ottawa Central 25.3 26.3 25.4 29.4 27 26.2 26.2 28.7 26.7 25.8 1.9 N-SSS
51010 Petawawa 24.7 24.4 23.8 22.8 28.1 24.5 22.9 24.4 23.4 21.1 -10.5 N-SSS
52023 Kingston 35.4 32.5 35.9 32 38.5 32.4 32.7 32.2 33.3 30.9 -6.8 N-SSS
54012 Belleville 32.3 30.6 34.2 29.9 32.7 30.6 30.4 33.2 33.7 30.9 2 N-SSS
56051 Cornwall 27.6 27.1 29.8 26.7 30.7 28.1 27 29.7 28.7 27.1 0 N-SSS
59006 Peterborough 31.6 29.2 32 29.8 34.2 29.5 30 31.5 32.3 29.2 0 N-SSS
63203 Thunder Bay 21.3 24.2 23.9 24.2 25.3 24.7 22.7 23.6 22 20.4 -13 N-SSS
71078 Sault Ste. Marie 28.4 27.5 27.2 26.4 30.3 28.2 27.4 28.1 26.3 26.3 -4.5 N-SSS
75010 North Bay 28.3 26.5 28.4 26.3 28.5 26.9 26.2 27.8 26.4 24.7 -7.5 N-SSS
77233 Sudbury 26 25.7 26.3 26.9 29.8 28 27 27.7 26.6 25.8 2.7 N-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 34021 replaced station 34020 as the Toronto North site in 2017.

Station 46090 replaced station 46089 as the Brampton site in 2017.

Station 46108 replaced station 46109 as the Mississauga site in 2008.

Station 52023 replaced station 52022 as the Kingston site in 2014.

Station 77233 replaced station 77219 as the Sudbury site in 2013.

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A16: 10 year trend for O3 winter means (January-April, October-December

Winter mean (ppb)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 21.7 20.8 23.2 22.5 21.7 22.8 22.8 22.4 23.6 23.3 7.9 N-SSS
12016 Windsor West 21.5 21.6 22.8 22.5 22.3 23.4 24.5 22.7 23.9 23.6 9.8 SSS
13001 Chatham 26.8 26.1 28.5 26.7 24.3 26.2 27.1 26.3 27.2 26.8 0.6 N-SSS
14111 Sarnia 25.5 25.2 28.1 27.4 24.7 26.2 25.4 25.4 INS 26 -0.8 N-SSS
15020 Grand Bend 30.5 29.5 33 32.1 29.1 31.8 30.6 29.1 29.8 30.2 -4 N-SSS
15026 London 23.7 22.8 25 24.2 22.9 26.9 27.1 25.8 26.6 26.9 17.5 SSS
16015 Port Stanley 31 29.4 31.5 31 29.3 31.8 31.3 31.2 31.2 31.5 1.5 N-SSS
18007 Tiverton 31.7 32.3 34.1 32.2 29.2 32.4 32.7 31.9 32.4 32.6 1 N-SSS
21005 Brantford 26.6 25.8 27.8 27.1 25.4 28.3 28.8 27.2 27.7 27.5 4.9 N-SSS
26060 Kitchener 26 25.9 27.8 25.7 24 26.7 26.5 26.1 26.6 27.1 3.5 N-SSS
27067 St. Catharines 24.9 24.1 25.6 25.8 24.1 26.8 27.9 26.3 27.2 27 11.5 SSS
28028 Guelph 26.1 26.4 29.3 27.2 24.8 28 27 26 26.8 27.5 2 N-SSS
29000 Hamilton Downtown 21.7 21.5 23.5 23.1 20.9 22.5 23.7 23.3 23.9 24.2 9.8 SSS
29114 Hamilton Mountain 25.7 24.5 26.3 26.3 25 27.3 27.3 26.3 26.8 27.4 7.7 SSS
29118 Hamilton West 20.9 20.4 22.1 22.7 20.6 23 22.8 22.1 22.5 23.7 12.5 SSS
31103 Toronto Downtown 22.2 22.4 22.4 22.6 21.8 23.5 23.5 22 22.7 23.6 4.5 SSS
33003 Toronto East 19.3 19.9 20.4 20.4 20.3 22 21.6 20.5 22.5 23.3 18.6 SSS
34021 Toronto North 20.1 19.5 22.5 20.8 20.7 22.3 22.8 22.1 22.6 22.3 14.2 SSS
35125 Toronto West 17.7 17.4 18 17.7 17.2 19.5 19.4 18.6 19.4 20.5 14.4 SSS
44008 Burlington 22.5 22.3 23.9 23.5 22.5 24.4 24.1 23.8 25.6 25.7 14.4 SSS
44017 Oakville 24.4 23.6 25.5 24.7 23.1 26.6 26.5 25.3 25.1 25.9 6.1 N-SSS
45026 Oshawa 25.7 24.9 26.9 25.2 24.1 26.4 26.7 24.3 25.6 27.3 3.4 N-SSS
46090 Brampton 23.4 22.8 25.2 23.8 22.2 24.6 24.8 23.8 24.1 25.6 7.3 N-SSS
46108 Mississauga 22.8 22.5 23.7 22.5 22.2 24.3 24.7 23.6 24.2 25.5 11.1 N-SSS
47045 Barrie 24.2 23.8 26 24.7 23.9 25.5 25.8 24.4 24.8 26.3 6.1 N-SSS
48006 Newmarket 27.6 27.1 29.4 25.8 26 27.5 28.1 26.6 26.3 27.2 -2.4 N-SSS
49005 Parry Sound 32 30.5 31.9 30.4 28.1 30.6 30.6 29.8 30 31.1 -2.8 N-SSS
49010 Dorset 30.7 29.6 31 29.5 27.7 30.1 30.1 28.8 29 29.6 -3.6 N-SSS
51001 Ottawa Downtown 22.2 22.6 25.5 23.6 23.5 24.9 25.1 24 24.3 25.6 10.7 SSS
51002 Ottawa Central 27 24.1 26.8 24.5 22.9 26.3 26.9 25.8 24.5 26.5 -0.6 N-SSS
51010 Petawawa 29.6 29.5 30.8 29.5 27.5 29.9 29.6 28.5 28.6 29.3 -3.9 N-SSS
52023 Kingston 30.6 28.6 30 29 28.6 28.8 30.4 28.9 28.5 30.2 -0.4 N-SSS
54012 Belleville 28 26.9 27 26.4 24.6 28.2 29.1 27 28.2 29.7 6.1 N-SSS
56051 Cornwall 26 24.5 26.5 25.7 24.2 25.7 27.6 26.6 26 27.4 7.6 N-SSS
59006 Peterborough 26 26.7 29.5 26.6 25.5 28 28.6 27.7 27.8 28.7 8.4 N-SSS
63203 Thunder Bay 24.3 24.2 27.1 26.1 24.7 27.4 23.8 24.2 24.2 25.6 -0.5 N-SSS
71078 Sault Ste. Marie 29.3 28.4 29.3 28.9 27.6 29.4 29.2 27.7 28 29.5 -0.6 N-SSS
75010 North Bay 27.2 25.8 27.7 27 24.4 27.8 27.1 26.4 26.4 27.6 -0.7 N-SSS
77233 Sudbury 29.3 26 30.5 30 27.6 26.6 25.8 24.3 24 26.1 -20 SSS

Notes:

INS indicates there was insufficient data to calculate a valid winter mean.

Station 14111 replaced station 14064 as the Sarnia site in 2016.

Station 15026 replaced station 15025 as the London site in 2013.

Station 34021 replaced station 34020 as the Toronto North site in 2017.

Station 46090 replaced station 46089 as the Brampton site in 2017.

Station 46108 replaced station 46109 as the Mississauga site in 2008.

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).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A17: 10 year trend for SO2

Annual mean (ppb)

SO2 1y AAQC: 20 ppb

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 4.5 3.5 3.5 3.5 2.8 2.4 2.4 1.9 1.1 1 -76.1 SSS
12016 Windsor West 4.7 3.6 3.2 3.4 2.8 2.6 2.8 1.9 1.4 0.9 -69.5 SSS
14111 Sarnia 7.7 4.5 3.9 5.3 4.1 3.8 3.5 3.2 INS 1.7 -49.8 SSS
29000 Hamilton Downtown 4.3 3.3 3.3 5.2 4.8 4.8 5.1 4.3 3.2 3.5 -23.5 SSS
29114 Hamilton Mountain 3 3 2.9 4.1 3.7 2.8 2.9 2.6 1.8 1.8 -50 SSS
35125 Toronto West 1.4 1.2 0.9 1.5 0.6 0.6 0.7 1 0.6 0.5 -45.2 SSS
51001 Ottawa Downtown 1 0.9 0.2 0.4 0.3 0.3 0.3 0.4 0 0.1 -45.1 SSS
71078 Sault Ste. Marie 1.2 0.6 0.7 0.8 0.6 0.8 0.8 0.8 0.6 0.7 -15.7 SSS
77233 Sudbury 2 1.1 1.3 1.5 1.3 2.8 2.4 2.4 2.1 1.3 17.4 N-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 77233 replaced station 77219 as the Sudbury site in 2013.

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A18: 10 year trend for CO

1h Maximum (ppm)

CO 1h AAQC: 30 ppm

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12008 Windsor Downtown 1.3 1.4 2.5 3.8 2.1 1.9 1.8 1.9 2.3 2.6 68.4 N-SSS
29000 Hamilton Downtown 3.3 5 2.2 1.8 1.7 2 2.9 1.3 1.4 2.1 -38.3 N-SSS
35125 Toronto West 1.7 1.6 1.8 1.4 1.4 1.4 1.6 1.3 1.7 1.2 -18.2 N-SSS
51001 Ottawa Downtown 1.3 1.4 1.5 1.5 0.9 0.9 0.8 0.8 0.9 0.7 -49.6 SSS

Note:

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A19: PM2.5 and ozone CAAQS metric values for designated sites across Ontario (2017)

City/Town 24h PM2.5
(micrograms per cubic metre)		 Annual PM2.5
(micrograms per cubic metre)		 8h Ozone
(parts per billion)
Windsor Downtown 19 8.4 70*
Sarnia 20 7.8 67*
Chatham 16 7.1 67*
London 18 7.5 68*
Brantford 18 7.8 68*
Kitchener 20 7.8 66*
Guelph 20 7.4 68*
St. Catharines 17 7.5 66*
Hamilton Downtown 22 9 65*
Hamilton Mountain 19 7.9 67*
Burlington 20 8 67*
Oakville 19 7.4 66*
Mississauga 20 7.5 66*
Brampton 21 7.4 67*
Toronto 21 8 69*
Oshawa 17 6.5 67*
Barrie 19 7.1 62
Peterborough 17 6.2 70*
Kingston 14 5.8 66*
Ottawa Downtown 18 6.3 60
Sudbury 14 5.6 62
Sault Ste. Marie 13 5.3 60
Thunder Bay 13 5.5 51

Note:

Designated sites normally refer to communities with populations greater than 100,000.

Sarnia’s PM2.5 metrics are based on a two-year average.

Toronto reporting is based on Toronto Downtown, Toronto North, Toronto East and Toronto West stations.

The CAAQS for 24h PM2.5 is 28 μg/m3 based on the 98th percentile measurement annually, averaged over three consecutive years.

The CAAQS for annual PM2.5 is 10 μg/m3 based on the annual mean averaged over three consecutive years.

The CAAQS for ozone is 63 ppb based on the consecutive three-year average of the annual 4th highest daily maximum eight-hour running average.

* indicates an exceedance of the CAAQS.

Table A20: 2017 Air Quality Health Index summary

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 No. of days at least 1 hour > 6
12008 Windsor Downtown 8630 1.09 36.26 51.66 10.06 0.93 0.01 0 0 0 0 0
12016 Windsor West 8596 1.64 43.32 45.66 8.7 0.66 0 0.01 0 0 0 1
13001 Chatham 8666 6.7 57.65 31.01 4.36 0.25 0 0.02 0 0 0 1
14111 Sarnia 8688 5.04 55.44 32.86 5.64 0.96 0.06 0 0 0 0 0
15020 Grand Bend 8641 14.55 65.13 18.45 1.6 0.23 0 0.05 0 0 0 3
15026 London 8701 10.47 57.73 27.85 3.88 0.07 0 0 0 0 0 0
16015 Port Stanley 8645 10.63 61.9 23.1 3.85 0.49 0 0.03 0 0 0 1
18007 Tiverton 8441 11.8 66.85 19.06 2.16 0.12 0 0.01 0 0 0 1
21005 Brantford 8669 13.53 59.03 24.12 3.25 0.07 0 0 0 0 0 0
26060 Kitchener 8507 9.25 58.26 28.68 3.74 0.07 0 0 0 0 0 0
27067 St. Catharines 8493 6.46 58.13 30.84 4.37 0.2 0 0 0 0 0 0
28028 Guelph 8691 9.94 57.39 28.83 3.76 0.07 0 0 0 0 0 0
29000 Hamilton Downtown 8667 2.23 37.84 45.7 12.22 1.82 0.13 0.06 0 0 0 1
29114 Hamilton Mountain 8719 3.51 49.93 38.66 7.45 0.39 0.05 0.01 0 0 0 1
29118 Hamilton West 8641 4.15 49.28 37.29 8.63 0.54 0.1 0 0 0 0 0
31103 Toronto Downtown 8643 1.53 34.46 49.06 13.09 1.79 0.06 0.02 0 0 0 1
33003 Toronto East 8716 3.6 44.71 41.54 9.25 0.85 0.03 0.01 0 0 0 1
34021 Toronto North 8682 6.07 50.53 34.68 7.76 0.9 0.05 0.01 0 0 0 1
35125 Toronto West 8695 1.22 35.86 49.15 12.51 1.22 0.01 0.02 0 0 0 1
44008 Burlington 8731 3.92 46.32 40.99 8.09 0.62 0.02 0.05 0 0 0 2
44017 Oakville 8689 5.56 53.87 34.11 5.75 0.69 0 0.01 0 0 0 1
45026 Oshawa 8665 11.4 57.17 26.53 4.45 0.4 0 0.03 0 0 0 2
46090 Brampton 8728 6.2 52.13 34.58 6.45 0.62 0.02 0 0 0 0 0
46108 Mississauga 8709 7.45 55.4 31.46 5.14 0.54 0 0 0 0 0 0
47045 Barrie 8512 11.47 55.11 28.49 4.41 0.53 0 0 0 0 0 0
48006 Newmarket 8742 10.56 59 26.3 3.92 0.19 0 0.02 0 0 0 1
49005 Parry Sound 8723 20.14 64.16 14.39 1.31 0 0 0 0 0 0 0
49010 Dorset 8520 26.21 59.8 13.31 0.68 0 0 0 0 0 0 0
51001 Ottawa Downtown 8657 15.34 55.3 25.25 3.72 0.39 0 0 0 0 0 0
51002 Ottawa Central 8732 18.51 60.96 17.51 2.74 0.24 0.05 0 0 0 0 0
51010 Petawawa 8474 29.17 60.11 10.29 0.42 0 0 0 0 0 0 0
52023 Kingston 8613 11.68 60.4 25.03 2.72 0.14 0 0.03 0 0 0 1
54012 Belleville 8554 10.69 63.75 22.35 2.95 0.22 0 0.05 0 0 0 2
56051 Cornwall 8485 14.76 62.36 19.67 3.01 0.15 0.06 0 0 0 0 0
59006 Peterborough 8726 14.84 59.51 22.18 3.15 0.31 0.01 0 0 0 0 0
63203 Thunder Bay 8650 19.26 61.58 18.1 0.91 0.14 0 0 0 0 0 0
71078 Sault Ste. Marie 8696 18.48 59.1 21.47 0.95 0 0 0 0 0 0 0
75010 North Bay 8723 21.96 61.05 15.72 1.27 0 0 0 0 0 0 0
77233 Sudbury 8324 14.48 59.35 23.14 2.41 0.62 0 0 0 0 0 0

Table A21: 2017 air quality alert summary

Air quality forecast region Special air quality statement Smog and air health advisory
Algonquin 0 0
Atikokan - Upsala - Quetico 0 0
Attawapiskat 0 0
Bancroft - Bon Echo Park 0 0
Barrie - Orillia - Midland 0 0
Belleville - Quinte - Northumberland 0 0
Big Trout Lake - Sachigo Lake 1 0
Brockville - Leeds and Grenville 0 0
Burk's Falls - Bayfield Inlet 0 0
Chapleau - Gogama 0 0
City of Hamilton 2 0
City of Ottawa 0 0
City of Thunder Bay 0 0
City of Toronto 2 0
Cornwall - Morrisburg 0 0
Dryden - Ignace 0 0
Dufferin - Innisfil 0 0
Dunnville - Caledonia - Haldimand 0 0
Elgin 0 0
Elliot Lake - Ranger Lake 0 0
Fort Frances - Rainy Lake 0 0
Fort Hope - Webequie 0 0
Fort Severn 1 0
Geraldton - Manitouwadge - Hornepayne 0 0
Greater Sudbury and Vicinity 0 0
Grey - Bruce 0 0
Haliburton 0 0
Halton - Peel 2 0
Huron - Perth 0 0
Kapuskasing - Hearst 0 0
Kenora - Nestor Falls 1 0
Kingston - Prince Edward 0 0
Kirkland Lake - New Liskeard - Temagami 0 0
Lake Nipigon - Wabakimi 0 0
London - Middlesex 0 0
Manitoulin - Blind River - Killarney 0 0
Manitoulin - Northshore - Killarney 0 0
Moosonee - Fort Albany 0 0
Niagara 0 0
Nipigon - Marathon - Superior North 0 0
North Bay - West Nipissing 0 0
Oxford - Brant 0 0
Parry Sound - Muskoka - Huntsville 0 0
Peawanuck 0 0
Peterborough - Kawartha Lakes 0 0
Pickle Lake - Wunnummin Lake 0 0
Prescott and Russell 0 0
Red Lake - Ear Falls 1 0
Renfrew - Pembroke - Barry's Bay 0 0
Sandy Lake - Pikangikum 3 0
Sarnia - Lambton 2 0
Sault Ste. Marie - Superior East 0 0
Simcoe - Delhi - Norfolk 0 0
Sioux Lookout - Savant Lake 0 0
Smiths Falls - Lanark - Sharbot Lake 0 0
Stirling - Tweed - South Frontenac 0 0
Superior West 0 0
Timmins - Cochrane 0 0
Waterloo - Wellington 0 0
Wawa - White River - Pukaskwa 0 0
Windsor - Essex - Chatham - Kent 1 0
York - Durham 2 0
Ontario 7 0

Table A22: 2017 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 Location No. of Samples 10% 25% 50% 75% 90% Max Min Mean Std. Dev. No. of Times Above 24h Criterion No. of Times Above Annual Criterion
12016 Windsor West College Ave./South St. 51 0.263 0.305 0.395 0.562 0.675 1.495 0.184 0.45 0.215 0 0
14111 Sarnia 700 Christina St. 45 0.217 0.314 0.543 0.783 1.095 1.638 0.109 0.604 0.378 0 1
15026 London 42 St. Julien St. 46 0.162 0.201 0.289 0.428 0.56 0.946 0.126 0.339 0.177 0 0
26060 Kitchener West Ave./Homewood Ave. 60 0.22 0.291 0.382 0.527 0.648 1.858 0.161 0.446 0.264 0 0
29000 Hamilton Downtown Elgin St./Kelly St. 58 0.189 0.308 0.448 0.739 1.07 2.257 0.154 0.569 0.387 0 1
48006 Newmarket Eagle St. W./McCaffrey Rd. 55 0.134 0.214 0.334 0.467 0.587 2.478 0.091 0.385 0.336 1 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 56 0.161 0.244 0.336 0.467 0.685 1.098 0.126 0.388 0.219 0 0

Table A23: 2017 toluene annual statistics

Unit: micrograms per cubic metre (μg/m3)

Toluene 24h AAQC (based on odour): 2,000 μg/m3

ID City Location No. of Samples 10% 25% 50% 75% 90% Max Min Mean Std. Dev. No. of Times Above 24h Criterion
12016 Windsor West College Ave./South St. 51 0.475 0.583 0.748 1.105 1.51 3.613 0.382 0.972 0.657 0
14111 Sarnia 700 Christina St. 45 0.271 0.639 1.148 1.672 3.693 5.692 0.18 1.55 1.422 0
15026 London 42 St. Julien St. 46 0.268 0.344 0.496 0.615 1.279 2.986 0.18 0.633 0.527 0
26060 Kitchener West Ave./Homewood Ave. 60 0.37 0.517 0.661 0.546 2.081 5.275 0.175 1.002 0.93 0
29000 Hamilton Downtown Elgin St./Kelly St. 58 0.38 0.471 0.876 1.615 2.575 6.202 0.21 1.296 1.195 0
48006 Newmarket Eagle St. W./McCaffrey Rd. 55 0.196 0.396 0.602 0.927 1.531 4.363 0.061 0.807 0.784 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 56 0.305 0.487 0.655 1.145 1.562 2.125 0.121 0.826 0.495 0

Table A24: 2017 ethylbenzene annual statistics

Unit: micrograms per cubic metre (μg/m3)

Ethylbenzene 24h AAQC: 1,000 μg/m3

ID City Location No. of Samples 10% 25% 50% 75% 90% Max Min Mean Std. Dev. No. of Times Above 24h Criterion
12016 Windsor West College Ave./South St. 51 0.081 0.105 0.144 0.213 0.313 0.671 0.062 0.181 0.114 0
14111 Sarnia 700 Christina St. 45 0.049 0.093 0.195 0.29 0.399 0.942 0.028 0.211 0.17 0
15026 London 42 St. Julien St. 46 0.045 0.062 0.089 0.118 0.204 0.478 0.015 0.106 0.08 0
26060 Kitchener West Ave./Homewood Ave. 60 0.067 0.091 0.11 0.182 0.342 0.795 0.035 0.164 0.144 0
29000 Hamilton Downtown Elgin St./Kelly St. 58 0.061 0.082 0.137 0.23 0.374 0.735 0.035 0.187 0.156 0
48006 Newmarket Eagle St. W./McCaffrey Rd. 55 0.032 0.071 0.094 0.161 0.226 0.613 0.011 0.131 0.117 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 56 0.048 0.069 0.094 0.163 0.196 0.396 0.018 0.12 0.073 0

Table A25: 2017 m-, and p-xylene annual statistics

Unit: micrograms per cubic metre (μg/m3)

ID City Location No. of Samples 10% 25% 50% 75% 90% Max Min Mean Std. Dev.
12016 Windsor West College Ave./South St. 51 0.203 0.27 0.384 0.594 0.911 2.062 0.162 0.505 0.381
14111 Sarnia 700 Christina St. 45 0.114 0.238 0.483 0.618 0.809 2.311 0.054 0.499 0.395
15026 London 42 St. Julien St. 46 0.096 0.152 0.213 0.279 0.54 1.46 0.011 0.269 0.244
26060 Kitchener West Ave./Homewood Ave. 60 0.143 0.223 0.26 0.503 1.044 2.385 0.075 0.451 0.459
29000 Hamilton Downtown Elgin St./Kelly St. 58 0.126 0.212 0.352 0.663 1.037 2.471 0.085 0.532 0.517
48006 Newmarket Eagle St. W./McCaffrey Rd. 55 0.085 0.161 0.232 0.418 0.642 2.016 0.015 0.35 0.362
51001 Ottawa Downtown Rideau St./Wurtemburg St. 56 0.097 0.179 0.261 0.47 0.57 1.644 0.036 0.336 0.259

Table A26: 2017 o-xylene annual statistics

Unit: micrograms per cubic metre (μg/m3)

ID City Location No. of Samples 10% 25% 50% 75% 90% Max Min Mean Std. Dev.
12016 Windsor West College Ave./South St. 51 0.082 0.109 0.143 0.218 0.341 0.728 0.066 0.19 0.132
14111 Sarnia 700 Christina St. 45 0.045 0.094 0.182 0.246 0.311 0.871 0.022 0.193 0.15
15026 London 42 St. Julien St. 46 0.039 0.058 0.084 0.104 0.216 0.513 0.006 0.104 0.089
26060 Kitchener West Ave./Homewood Ave. 60 0.059 0.084 0.104 0.186 0.367 0.815 0.031 0.164 0.155
29000 Hamilton Downtown Elgin St./Kelly St. 58 0.051 0.082 0.131 0.249 0.408 0.836 0.033 0.199 0.181
48006 Newmarket Eagle St. W./McCaffrey Rd. 55 0.034 0.064 0.092 0.16 0.229 0.617 0.007 0.128 0.118
51001 Ottawa Downtown Rideau St./Wurtemburg St. 56 0.043 0.077 0.103 0.181 0.213 0.579 0.018 0.133 0.094

Table A27: 2017 1,3-butadiene annual statistics

Unit: micrograms per cubic metre (μg/m3)

1,3-Butadiene Annual AAQC: 2.0 μg/m3

ID City Location No. of Samples 10% 25% 50% 75% 90% Max Min Mean Std. Dev. No. of Times Above Annual Criterion
12016 Windsor West College Ave./South St. 51 0.014 0.019 0.026 0.032 0.045 0.098 0.007 0.028 0.016 0
14111 Sarnia 700 Christina St. 45 0.015 0.02 0.029 0.098 0.172 0.453 0.005 0.071 0.089 0
15026 London 42 St. Julien St. 46 0.008 0.01 0.016 0.023 0.029 0.098 0.006 0.02 0.016 0
26060 Kitchener West Ave./Homewood Ave. 60 0.01 0.012 0.023 0.036 0.053 0.149 0.007 0.029 0.025 0
29000 Hamilton Downtown Elgin St./Kelly St. 58 0.012 0.015 0.024 0.039 0.054 0.134 0.01 0.033 0.025 0
48006 Newmarket Eagle St. W./McCaffrey Rd. 55 0.009 0.01 0.016 0.025 0.036 0.076 0.004 0.02 0.015 0
51001 Ottawa Downtown Rideau St./Wurtemburg St. 56 0.011 0.018 0.023 0.031 0.045 0.098 0.007 0.028 0.019 0

Table A28: 10 year trend for benzene

Annual mean (μg/m3)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12016 Windsor West 0.765 0.75 0.687 INS 0.558 0.519 0.61 0.566 0.523 0.45 -33.7 SSS
14111 Sarnia INS 0.849 0.961 INS 0.903 0.82 1.007 1.191 0.696 0.604 -16 SSS
15026 London INS 0.474 0.49 INS 0.455 0.413 0.446 0.451 0.355 0.339 -27.2 SSS
26060 Kitchener 0.545 0.51 0.537 INS 0.479 n/a 0.483 0.548 0.406 0.446 -16.5 SSS
29000 Hamilton Downtown 0.91 0.987 1.06 INS 0.977 INS 0.899 1.092 0.683 0.569 -21.1 SSS
48006 Newmarket 0.553 0.442 0.416 n/a 0.374 0.406 0.422 0.425 0.342 0.385 -20.7 SSS
51001 Ottawa Downtown 0.561 0.517 0.451 0.418 0.423 0.442 0.413 0.453 0.377 0.388 -21.1 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.

SSS - Significant Sen's Slope (significant trend detected).

Table A29: 10 year trend for toluene

Annual mean (μg/m3)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12016 Windsor West 1.87 1.726 1.679 INS 1.392 1.017 1.542 1.248 1.272 0.972 -34 SSS
14111 Sarnia INS 2.601 2.043 INS 2.54 1.588 1.908 2.35 1.778 1.55 -17.4 N-SSS
15026 London INS 1.727 1.334 INS 1.409 0.887 0.839 1.013 0.727 0.633 -64.2 SSS
26060 Kitchener 1.801 1.642 1.477 INS 1.327 n/a 1.278 1.052 1.02 1.002 -37.2 SSS
29000 Hamilton Downtown 3.821 2.227 2.842 INS 2.067 INS 2.229 2.249 1.642 1.296 -30.8 SSS
48006 Newmarket 1.266 1.011 0.882 n/a 0.878 0.917 0.732 1.34 1.118 0.807 -17.4 SSS
51001 Ottawa Downtown 1.936 1.665 1.212 0.929 0.902 0.975 0.741 0.982 0.902 0.826 -38.5 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.

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A30: 10 year trend for ethylbenzene

Annual mean (μg/m3)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12016 Windsor West 0.294 0.278 0.276 INS 0.225 0.179 0.268 0.239 0.235 0.181 -26.1 SSS
14111 Sarnia INS 0.403 0.392 INS 0.28 0.256 0.253 0.363 0.283 0.211 -34.1 SSS
15026 London INS 0.219 0.192 INS 0.15 0.126 0.122 0.151 0.11 0.106 -51 SSS
26060 Kitchener 0.302 0.212 0.223 INS 0.169 n/a 0.168 0.17 0.159 0.164 -26 SSS
29000 Hamilton Downtown 0.336 0.291 0.279 INS 0.199 INS 0.193 0.212 0.186 0.187 -27.1 SSS
48006 Newmarket 0.214 0.164 0.159 n/a 0.121 0.135 0.126 0.249 0.217 0.131 -11.9 SSS
51001 Ottawa Downtown 0.257 0.21 0.149 0.128 0.111 0.114 0.102 0.125 0.121 0.12 -35 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.

SSS - Significant Sen's Slope (significant trend detected).

Table A31: 10 year trend for m-, p-xlyene

Annual mean (μg/m3)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12016 Windsor West 0.861 0.849 0.818 INS 0.697 0.536 0.825 0.701 0.635 0.505 -31.6 SSS
14111 Sarnia INS 1.156 0.791 INS 0.683 0.511 0.627 0.852 0.496 0.499 -31.7 SSS
15026 London INS 0.607 0.501 INS 0.395 0.346 0.323 0.4 0.269 0.269 -54.2 SSS
26060 Kitchener 0.802 0.608 0.642 INS 0.486 n/a 0.473 0.464 0.435 0.451 -27.8 SSS
29000 Hamilton Downtown 0.962 0.855 0.842 INS 0.61 INS 0.595 0.621 0.518 0.532 -31 SSS
48006 Newmarket 0.59 0.459 0.443 n/a 0.341 0.364 0.336 0.584 0.486 0.35 -19.7 SSS
51001 Ottawa Downtown 0.72 0.622 0.435 0.359 0.322 0.332 0.317 0.365 0.341 0.336 -32.7 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.

SSS - Significant Sen's Slope (significant trend detected).

Table A32: 10 year trend for o-xlyene

Annual mean (μg/m3)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12016 Windsor West 0.294 0.275 0.257 INS 0.233 0.186 0.286 0.24 0.232 0.19 -22.5 SSS
14111 Sarnia INS 0.294 0.262 INS 0.248 0.172 0.227 0.315 0.179 0.193 -24.9 N-SSS
15026 London INS 0.186 0.152 INS 0.135 0.121 0.118 0.15 0.106 0.104 -34.9 SSS
26060 Kitchener 0.26 0.191 0.192 INS 0.162 n/a 0.17 0.168 0.154 0.164 -23.7 SSS
29000 Hamilton Downtown 0.32 0.269 0.243 INS 0.202 INS 0.208 0.221 0.19 0.199 -14.8 SSS
48006 Newmarket 0.196 0.149 0.136 n/a 0.117 0.129 0.138 0.221 0.194 0.128 -8.7 N-SSS
51001 Ottawa Downtown 0.258 0.206 0.152 0.133 0.122 0.123 0.115 0.137 0.128 0.133 -26.6 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.

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).

Table A33: 10 year trend for 1,3-butadiene

Annual mean (μg/m3)

ID City/Town 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent change over 10 years Trend
12016 Windsor West 0.06 0.058 0.054 INS 0.046 0.038 0.046 0.037 0.036 0.028 -46.6 SSS
14111 Sarnia INS 0.228 0.158 INS 0.202 0.21 0.124 0.218 0.089 0.071 -25.4 SSS
15026 London INS 0.037 0.035 INS 0.031 0.025 0.029 0.028 0.019 0.02 -42.5 SSS
26060 Kitchener 0.042 0.04 0.043 INS 0.034 n/a 0.032 0.032 0.025 0.029 -39.4 SSS
29000 Hamilton Downtown 0.054 0.052 0.055 INS 0.044 INS 0.036 0.041 0.028 0.033 -37.5 N-SSS
48006 Newmarket 0.035 0.029 0.026 n/a 0.023 0.024 0.02 0.03 0.022 0.02 -23.3 N-SSS
51001 Ottawa Downtown 0.056 0.049 0.041 0.039 0.033 0.038 0.028 0.033 0.029 0.028 -39.9 N-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.

SSS - Significant Sen's Slope (significant trend detected).

N-SSS - Non-Significant Sen's Slope (significant trend not detected).