A A
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Government Of Assam Environment & Forest Pollution Control Board

Ambient Air Quality Standards in Respect to Noise

  • ZONE CODEZONELIMITS IN dB(A)
    DAY TIME
    6 AM TO 9 PM)    		NIGHT TIME
    9 PM TO 6 AM)
    (A)Industrial7570
    (B)Commercial6555
    (C)Residential5545
    (D)Silence5040