National Ambient Air Quality Standards
National Ambient Air Quality Standards
Canada
|
Air Contaminant |
Desirable |
Acceptable |
Tolerable |
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|
|
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|
Sulphur Dioxide |
ug/m3 |
ppb |
ug/m3 |
ppb |
ug/m3 |
ppb |
|
1 hour |
450 |
172 |
900 |
334 |
na |
na |
|
24 hours |
150 |
57 |
300 |
115 |
800 |
306 |
|
Annual |
30 |
11 |
60 |
23 |
na |
na |
|
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|
Carbon Monoxide |
mg/m3 |
ppm |
mg/m3 |
Ppm |
mg/m3 |
ppm |
|
1 hour |
15 |
13.1 |
35 |
30.6 |
na |
na |
|
8 hours |
6 |
5.2 |
15 |
13.1 |
20 |
17.5 |
|
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|
Nitrogen Dioxide |
ug/m3 |
ppb |
ug/m3 |
Ppb |
ug/m3 |
ppb |
|
1 hour |
na |
na |
402 |
214 |
1000 |
532 |
|
24 hours |
na |
na |
200 |
106 |
300 |
160 |
|
Annual |
60 |
32 |
100 |
53 |
na |
na |
|
|
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|
Ozone |
ug/m3 |
ppb |
ug/m3 |
Ppb |
ug/m3 |
ppb |
|
1 hour |
100 |
51 |
160 |
82 |
300 |
153 |
|
24 hours |
30 |
15 |
50 |
25 |
na |
na |
|
Annual |
20 |
10 |
30 |
15 |
na |
na |
|
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|
Suspended Particulates |
ug/m3 |
ug/m3 |
ug/m3 |
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|
24 hours |
na |
120 |
400 |
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|
Annual |
60 |
70 |
na |
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|
Hydrogen Fluoride ** |
ug/m3 |
ppb |
ug/m3 |
Ppb |
ug/m3 |
ppb |
|
70 days |
na |
na |
0.20 |
0.2 |
na |
na |
|
30 days |
na |
na |
0.35 |
0.4 |
na |
na |
|
7 days |
0.20 |
0.2 |
0.55 |
0.7 |
na |
na |
|
24 hours |
0.40 |
0.5 |
0.85 |
1.0 |
na |
na |
|
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|
Hydrogen Sulphide ** |
ug/m3 |
ppb |
ug/m3 |
ppb |
ug/m3 |
ppb |
|
24 hours |
na |
na |
5.0 |
3.6 |
na |
na |
|
1 hour |
1.0 |
0.7 |
15.0 |
10.8 |
na |
na |
** Proposed
Source: BC Ministry of Environment, Land and Parks - Air Quality Impact Assessment, 2000.
United States of America
|
Sulphur Dioxide |
ug/m3 |
ppb |
|
24 hours |
365 |
140 |
|
Annual |
80 |
30 |
|
Carbon Monoxide |
mg/m3 |
ppm |
|
1 hour |
40 |
35 |
|
8 hours |
10 |
9 |
|
|
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|
Nitrogen Dioxide |
ug/m3 |
ppb |
|
Annual |
100 |
53 |
|
|
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|
Ozone * |
ug/m3 |
ppb |
|
1 hour |
235 |
120 |
|
8 hours |
157 |
80 |
|
|
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|
Particulate (PM-10) |
ug/m3 |
ppm |
|
24 hours |
150 |
na |
|
Annual |
50 |
na |
|
|
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|
Particulate |
ug/m3 |
ppm |
|
24 hours |
65 |
na |
|
Annual |
15 |
na |
|
Lead |
ug/m3 |
ppb |
|
Quarterly |
1.5 |
0.47 |
* See Notes
Source: EPA National Ambient Air Quality Standards, 2002.
World Health Organization and United Nations Economic Commission for Europe
|
Sulphur Dioxide |
ug/m3 |
ppb |
|
(Health Guideline) |
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|
10 minute mean |
500 |
188 |
|
24 hour mean |
125 |
47 |
|
Annual mean |
50 |
18 |
|
(Vegetation Guideline) |
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|
24 hours |
70 |
26 |
|
Annual |
20 |
8 |
|
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|
Carbon Monoxide |
ug/m3 |
ppb |
|
15 minutes |
100 000 |
86 957 |
|
30 minutes |
60 000 |
52 174 |
|
1 hour |
30 000 |
26 087 |
|
8 hours |
10 000 |
8 696 |
|
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|
Nitrogen Dioxide |
ug/m3 |
ppb |
|
(Health Guideline) |
||
|
1 hour |
200 |
105 |
|
1 year |
40 |
21 |
|
(Vegetation Guideline) |
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|
Annual mean |
29 |
15 |
|
|
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|
Ozone |
ug/m3 |
ppb |
|
(Health Guideline) |
||
|
8 hours |
120 |
60 |
|
(Vegetation Guideline) |
|
|
|
Growing season mean |
50 |
25 |
|
1 hour |
150 |
75 |
|
8 hours |
60 |
30 |
|
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|
Lead |
ug/m3 |
ppb |
|
1 year |
0.5 |
0.16 |
Source for Health Guideline: WHO Guidelines for Air Quality, 2000.
Source for Vegetation
Guideline: The Atmosphere, Climate and Environment Information Program - Air Pollution &
Acid Rain Fact Sheets Series: KS4 & A
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