Air Standards
Noise Standards
Water Standards
D.G. Sets Standards

Noise Standards

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 :
  1. Day time is reckoned in between 6.00 AM and 9.00 PM

  2. Night time is reckoned in between 9.00 PM and 6.00 AM

  3. 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.

  4. 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.