|
|
|
|
|
|
| |
Ambient
Air Quality Standards in Respect to Noise
|
ZONE
CODE
|
ZONE
|
LIMITS
IN dB(A)
|
|
DAY
TIME
(6 AM TO 9 PM)
|
NIGHT
TIME
(9 PM TO 6 AM)
|
|
(A)
|
Industrial
|
75
|
70
|
|
(B)
|
Commercial
|
65
|
55
|
|
(C)
|
Residential
|
55
|
45
|
|
(D)
|
Silence
|
50
|
40
|
|
|
| |
|
|
|
|
| |
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rights ® reserved, 2003-08. Pollution Control Board, Assam
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