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| Pollutants | Time weighted average |
Concentration in ambient air | Method of measurement | ||
| Industrial Area |
Residential Area |
Sensitive of Rural & other Areas |
|||
| 1 | 2 | 3 | 4 | 5 | 6 |
| Sulphur
Dioxide (SO2) |
Annual
Average 24 hours |
80
μg/m3 120 μg/m3 |
60
μg/m3 80 μg/m3 |
15
μg/m3 30 μg/m3 |
1.Improved
West and Geake method |
| Oxides
of Nitrogen as NO2 |
Annual Average 24 hours |
80 μg/m3 120 μg/m3 |
60 μg/m3 80 μg/m3 |
15 μg/m3 30 μg/m3 |
1.
Ultraviolet fluorescence 2. Jacob & Hochheiser modified(Na-Arsenite)Method 3. Gas Phase Chemiluminescence |
| Suspended
Particulate Matter(SPM) |
Annual Average 24 hours |
360 μg/m3 500 μg/m3 |
140
μg/m3 200 μg/m3 |
70 μg/m3 100 μg/m3 |
High
Volume sampling (Average flow rate not less than 1.1 m3/minute) |
| Respirable
Particulate matter (size less than 10 μm)(RPM) |
Annual
Average 24 hours |
120
μg/m3 150 μg/m3 |
60
μg/m3 100 μg/m3 |
50
μg/m3 75 μg/m3 |
Respirable
particulate matter sampler |
| Lead(Pb) | Annual
Average 24 hours |
1.0
μg/m3 1.5 μg/m3 |
0.75
μg/m3 1.00 μg/m3 |
0.50
μg/m3 0.75 μg/m3 |
AAS
Method after sampling using EPM 2000 or equivalent Filter paper |
| Carbon
Monoxide (CO) |
8
hours 1 hour |
5.0
mg/m3 10.0 mg/m3 |
2.0
mg/m3 4.0 mg/m3 |
1.0
mg/m3 2.0 mg/m3 |
Non
dispersive infrared spectroscopy |
Annual Arithmetic mean of minimum 104 measurements in a year
taken twice a week 24 hourly at
uniform interval.
24 hourly/8 hourly values should be met 98% of the time in a year.
However, 2% of the time, it may
exceed but not on two consecutive days.
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