A stylized map of the Denver metro area

Where to Go

The Air Care Colorado Inspection and Maintenance (I/M) Program is a network of 18 vehicle emissions testing stations conveniently located throughout the Denver metropolitan and North Front Range areas. Additionally, 18 RapidScreen roadside emissions testing units are rotated among state-approved locations throughout the program area.

Depending on the vehicle model year, Air Care Colorado uses three different testing methods to measure and evaluate emissions:

  1. Vehicle 8 to 11 model years old: On-Board Diagnostics (OBD) "plug-in" test.
  2. Vehicles model 12 years through 1982: I/M 240 dynamometer "treadmill" test.
  3. Vehicles model years 1981 and older: Two-speed idle test.
  • Newer gasoline-powered vehicles - less than 7 years old - do not require emissions testing.

    **Air Care Colorado stations DO NOT TEST DIESEL-POWERED VEHICLES.
    You can find a list of diesel emissions inspection stations by clicking on the link below.
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  • Find inspection stations and RapidScreen sites near you, diesel inspection stations, and county motor vehicle offices.

LOW PROFILE RIMS & OVERSIZED TIRES - Please note that front-wheel and all-wheel drive vehicles with low-profile rim sizes 17 inches or larger in diameter or vehicles with wheel sizes larger than 34 inches must be tested on special dynamometers capable of testing vehicles with these unusual features. Please take your vehicle to the Sheridan, Boulder, Ken Caryl, or Fort Collins stations for inspection. These are the only stations in the program area equipped with specialized dynamometers that can test these vehicles.

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