Welcome Desk

How are vehicles tested for emissions?

Before a vehicle manufacturer can offer a new vehicles for sale, EPA requires that various laboratory emission tests be conducted on vehicles representative of the vehicles that will be sold to car buyers, to ensure that vehicles is meeting the emission standards. The tests are conducted to simulate a wide variety of actual on-road operating conditions (such as highway driving and city driving). The data from these tests is also us3ed to calculate city and highway fuel economy (mpg) values which appear on the window sticker of new vehicles.