Noise : (Ambient Air Quality Standards)

Noise : (Ambient Air Quality Standards)

Area Code	Category of Area	Limit in dB (A) Leg
		Day time	Night Time
A	Indusrial Area	75	70
B	Commercial Area	65	55
C	Residential Area	55	45
D	Silenee Zone	50	40

Note - 1Day time is reckoned in between 6 A.M. and 9 P.M

Note - 2Night time is reckond in between 9 P.M. and 5 A.M.

Note - 3Silence zone is defined as areas upto 100 metres around such premises as hospitals, educational institutions and courts. The silence zones are to be declared by the Competent Authority.

Note – 4Mixed categories of areas should be declared as "one of the four above metioned categories by the Competent Authority and the corresponding standard shall apply.

1. Noise Limits for Automobiles (Free Field at 7.5 metre in Db(A) at the Manufacturing Stage) to be Achieved by the year 1992 

            a) Motorcycle, scooters & three wheelers                                           80

            b) Passenger cars                                                                                     82

            c) Passenger or commercial vehicles upto 4 tonne                             85

            d) Passenger or commercial vehicles above 4 tonne                          89
               and upto 12 tonne

            e) Passenger or commercial vehicles exceeding 12 tonne                  91

2. Domestic Applicances and Contruction Equipments at the Manufacturing Stage to be Achieved by the Year, 1993 Db (A)

             a) Window air Conditioners of 1 tonne to 1.5 tonne                         68

             b) Air collers                                                                                            60

             c) Refrigerators                                                                                        46

             d) Diesel generators for domestic purposes                                       85 to 90

             e) Compactors (rollers), front loaders, mixers,                                    75
                 Cranes (movable) vibrators and saws.