| Air Standards |
| Noise Standards |
| Water Standards |
| D.G. Sets Standards |
Air Quality Standards
This nation-wide programe was initiated in 1984. As on March 31, 1995,
the network comprised 290 stations covering over 90 towns/cities distributed over 24
States and 4 Union Territories. The National Ambient Air Quality Monitoring (NAAQM)
network is operated through the respective States Pollution Control Boards, the National
Environmental Engineering Research Institute (NEERI), Nagpur and also through the CPCB.
The pollutants monitored are Sulphur dioxide (SO2), Nitrogen
dioxide (NO2) and Suspended Particulate Matter (SPM) besides the
meteorological parameters, like wind speed & direction, temperature and humidity. In
addition to the three conventional parameters, NEERI monitors special parameters, like
Ammonia (NH3), Hydrogen Sulphide (H2S),
Respirable Suspended Particulate Matter (RSPM) and Polyaromatic Hydrocarbons (PAH).
Based on Annual Mean Concentration (microgram per cubic meter of ambient air) of SO2,
NO2 and SPM and the Notified Ambient Air Quality Standards, the
Ambient Air Quality Status is described in terms of Low (L), Moderate (M), High (H) and
Critical (C) for Industrial (I), Residential and mixed use (R) areas of Cities/Towns in
different States/UTs.
National Ambient Air quality Standards (NAAQS)
| POLLUTANTS | Time Weighted Average | Concentration of Ambient Air | |||
|---|---|---|---|---|---|
| Industrial Area | Residential Rural and other area | Sensitive area | Method of Measurement | ||
| Sulphur Dioxide (SO2) | Annual Average 24 hours |
80µg/m3 120µg/m3 |
60µg/m3 80µg/m3 |
15µg/m3 30µg/m3 |
Improved west and Gacke Method Ultraviolet fluorescence |
| Oxides of Nitrogen (NO2) | Annual Average 24 hours |
80µg/m3 120µg/m3 |
60µg/m3 80µg/m3 |
15µg/m3 30µg/m3 |
Jacab Hochheister modified (Na-Arsentire
method Gas Phase Chemilumine Scene |
| Suspended Particulate Matter (SPM) | Annual Average 24 hours |
360µg/m3 500µg/m3 |
140µg/m3 200µg/m3 |
70µg/m3 100µg/m3 |
High Volume sampling (average flow rate not less than 1.1 m3/minute) |
| Respirable Particulate Matter (size Less than
10µm) RPM |
Annual Average 24 hours |
120µg/m3 150µg/m3 |
60µg/m3 100µg/m3 |
50µg/m3 75µg/m3 |
Respirable particulate matter sampler |
| Lead as Pb | Annual Average 24 hours |
1.0µg/m3 1.5µg/m3 |
0.75µg/m3 1.0µg/m3 |
0.50µg/m3 0.75µg/m3 |
AAS method after sampling using EPM 2000 or equivalent filter paper |
| Carbon Monoxide | 8 hours 1 hour |
5.0mg/m3 10.0mg/m3 |
2.0mg/m3 4.0mg/m3 |
1.0mg/m3 2.0mg/m3 |
Non disbersive infrared spectroscopy |
| Annual Average : Annual Arithmetic Mean of minimum 104
measurements in a year taken twice a week 24-hourly at uniform interval 24 Hours Average : 24-hourly/8-hourly values should be met 98% of the time in a year. However 2% of the time, it may exceeded but not two consecutive days. |
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