Motor vehicle emissions

Our Mobile Sources Program controls air pollution from motor vehicles through a variety of programs and activities.
Automobile Inspection and Readjustment (AIR) Program, emissions inspection station locations, metro Denver and northern Front Range emissions inspection, RapidScreen Roadside Emissions Testing Program
Self-certification, large fleets, small fleets and individuals, Clean Diesel School Bus Retrofit Program
Locations, including high-altitude testing
Engines Off! Idle Reduction, frequently requested information, Oxygenated Gasoline Program, Small Business Technical Assistance Program, smoking vehicle hotline