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Environment

Thu24May2012

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Average Noise Levels in Various Metropolitan Cities

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				(Decibels/Annum)
Metropolitan Cities	Day/Night	Industrial Area	Commercial Area	Residential Area	Silence Area
Calcutta	Day	78	82	79	79
	Night	67	75	65	65
Mumbai	Day	76	75	70	66
	Night	65	66	62	52
Chennai	Day	71	78	66	63
	Night	66	71	48	49
Bangalore	Day	78	76	67	67
	Night	53	57	50	NA
Source: Ministry of Environment & Forests