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

Diesel Emissions Control Program

Self-certification, large fleets, small fleets and individuals, Clean Diesel School Bus Retrofit Program

Emissions Technical Centers

Locations, including high-altitude testing

Motor vehicle emissions resources

Engines Off! Idle Reduction, frequently requested information, Oxygenated Gasoline Program, Small Business Technical Assistance Program, smoking vehicle hotline

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