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Environmental Protection Act
Loi sur la protection de l’environnement

R.R.O. 1990, REGULATION 337

AMBIENT AIR QUALITY CRITERIA

Historical version for the period August 31, 2007 to August 30, 2008.

Note: This Regulation is revoked on August 31, 2008. See: O. Reg. 518/07, ss. 1, 2.

Last amendment: O. Reg. 518/07.

This Regulation is made in English only.

1. The desirable ambient air quality criteria for each contaminant set out in Column 1 of the Schedule is that amount of concentration or total amount of contaminant set out opposite thereto in Column 3 of the Schedule in the unit of measurement set out opposite thereto in Column 2 of the Schedule for the time set out opposite thereto in Column 4 of the Schedule. R.R.O. 1990, Reg. 337, s. 1.

SCHEDULE

Item

Column 1

Column 2

Column 3

Column 4

Column 5

 

Name of Contaminant

Unit of Measurement

Average Amount of Concentration or Total Amount of Contaminant

Period of Time

Approximate Equivalent at 10°C and 760 mm Hg pressure

1.

Arsenic

Micrograms of Arsenic per cubic metre of air

25

24 hours

 

2.

Cadmium

Micrograms of cadmium per cubic metre of air

2.0

24 hours

 

3.

Carbon Monoxide

Parts of carbon monoxide per one million parts of air by volume

30

1 hour

36,200 ug/m3

     

13

8 hours

15,700 ug/m3

4.

Dustfall

Tons of dustfall per square mile per month

20 total

30 days

 
     

13

1 year

 

5.

Fluorides (Gaseous) April 15 to October 15

Parts of fluorides per billion parts of air by volume (Expressed as HF)

1.0

24 hours

0.86 ug/m3

     

0.4

30 days

0.34 ug/m3

6.

Total Fluorides (Gaseous and Particulate) April 15 to October 15

Parts of fluorides per one billion parts of air by volume (Expressed as HF)

2.0

24 hours

1.72 ug/m3

     

0.8

30 days

0.69 ug/m3

7.

Total Fluorides (Gaseous and Particulate) October 16 to April 14

Parts of fluorides per one billion parts of air by volume (Expressed as HF)

4.0

24 hours

3.44 ug/m3

     

1.6

30 days

1.38 ug/m3

8.

Fluorides in Forage for Consumption by Livestock

Parts of total fluorides per one million parts forage (dry weight)

35

Individual Sample

 

9.

Fluoridation (total) April 15 to October 15

Micrograms of total fluorides collected by 100 sq. centimetres of limed filter paper

40

30 days

 

10.

Fluoridation (total) October 16 to April14

Micrograms of total fluorides collected by 100 sq. centimetres of limed filter paper

80

30 days

 

11.

Hydrogen Sulphide

Parts of hydrogen sulphide per one million parts of air by volume

0.02

1 hour

30 ug/m3

12.

Lead

Micrograms of lead per cubic metre of air

2.0

24 hours

 
     

0.7 arithmetic average

30 days

 

13.

Mercaptans

Parts of mercaptans per one million parts of air by volume (Expressed as methyl mercaptan)

0.01

1 hour

20 ug/m3

14.

Mercury

Micrograms of mercury per cubic metre of air

2.0

24 hours

 

15.

Nickel

Micrograms of Nickel per cubic metre of air

2.0

24 hours

 

16.

Nitrogen Dioxide

Parts of nitrogen dioxide per one million parts of air by volume

0.20

1 hour

400 ug/m3

     

0.10

24 hours

200 ug/m3

17.

Oxidants (total)

Parts of total oxidants per one million parts of air by volume

0.10

1 hour

 

18.

Ozone

Parts of ozone per one million parts of air by volume

0.08

1 hour

165 ug/m3

19.

Soiling

Coefficient of Haze per 1,000 feet of air

1.0

24 hours

 
     

0.5

1 year

 

20.

Sulphation

Milligrams of sulphur trioxide per 100 sq. cm of exposed lead peroxide per day

0.7

30 days

 

21.

Sulphur Dioxide

Parts of sulphur dioxide per one million parts of air by volume

0.25

1 hour

690 ug/m3

     

0.10

24 hours

275 ug/m3

     

0.02

1 year

55 ug/m3

22.

Suspended Particulate Matter

Micrograms of suspended particulate matter per cubic metre of air

120

24 hours

 
     

60 geometric mean

1 year

 

23.

Vanadium

Micrograms of vanadium per cubic metre of air

2.0

24 hours

 

R.R.O. 1990, Reg. 337, Sched.; O. Reg. 794/94, s. 1.