The AIR Index – The Testing Process Infographic

Whether they are diesel, petrol, hybrid or electric, the most accurate way to measure harmful emissions is to test cars on the road in actual driving conditions.

Every car with a published AIR Index rating is tested in accordance with the CWA 17379 methodology ensuring a series of strictly controlled, independently conducted tests using Portable Emissions Measurement Systems (PEMS) equipment.

This infographic shows some of the detailed parameters when testing vehicles for rating in the AIR Index.

The AIR Index - The Testing Process