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Vehicle Pollution - Exhaust Emission Standards

The pollution standards for in use vehicles have been prescribed under Rule 115(2) of Central Motor vehicles Rules, 1989. They are:

Petrol / CNG / LPG Vehicles:

a) Idling Carbon Monoxide emission limit for all two and three-wheeled vehicles should not exceed 4.5%.

b) Idling Carbon Monoxide Emission limit for all vehicles other than two and three- wheelers should not exceed 3%.

Diesel Vehicles:

Smoke density for all diesel driven vehicles should not exceed 65 hartridge Smoke Units.