Delhi Pollution Control Committee
Ambient Air Quality Standards In Respect of Noise
| Area Code | Category of Area | Limits in dB (A) Leq | |
| Day Time | Night Times | ||
| (A) | Industrial area | 75 | 70 |
| (B) | Commercial area | 65 | 55 |
| (C) | Residential area | 55 | 45 |
| (D) | Silence Zone | 50 | 40 |
Note :
- Day time is reckoned in between 6.00 AM and 10.00 PM
- Night time is reckoned in between 10.00 PM and 6.00 AM
- Silence zone is defined as areas upto 100 meters around such premises as hospitals, educational institutions and courts. The Silence zones are to be declared by the Competent Authority.
- Use of vehicular horns, loudspeakers and bursting of crackers shall be banned in these zones.
- Mixed categories of areas should be declared as one of the four above mentioned categories by the Competent Authority and the corresponding standards shall apply.