| Pollutant | Time-Weighted Average |
Concentration in
Ambient Air (Microgrammes per M3) |
||
|---|---|---|---|---|
| Industrial | Residential | Sensitive | ||
| Sulphur Dioxide (SO2) | Annual Avg. 24 Hrs. |
80 120 |
60 80 |
15 30 |
| Oxides of Nitrogen as NO2 | Annual Avg. 24 Hrs. |
80 120 |
60 80 |
15 30 |
| Suspended Particulate Matter (SPM) | Annual Avg 4 Hrs. |
360 500 |
140 200 |
70 100 |
| Respirable Particulate Matter (Size less than 10mm) |
Annual Avg. 24 Hrs |
120 150 |
60 100 |
50 75 |
| Lead | Annual Avg. 24 Hrs. |
1.0 1.5 |
0.75 1.00 |
0.50 0.75 |
| Carbon Monoxide (Mg/M3) | 8 Hrs. 1 Hr. |
5.0 10.0 |
2.00 4.00 |
1.00 2.00 |
| Note: | The
national standards for ambient air quality have been notified under the
Air (Prevention & Control of Pollution) Act, 1981 and in the
Environment (Protection) Act, 1986. The standards specify the maximum
limit to which major pollutants are permitted in various zones.
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