Automobile Inspection and Readjustment (AIR) Program


The Automobile Inspection and Readjustment (AIR) Program's purpose is to reduce motor-vehicle-related pollution through the inspection and emissions-related repair of motor vehicles.


  • The program is administered jointly by our Air Pollution Control Division and the Colorado Department of Revenue.
    • The Air Pollution Control Division certifies the program, including testing procedures and equipment.
    • It works with the Air Quality Control Commission, the Regional Air Quality Council, the state Legislature, local governments, the U.S. Environmental Protection Agency (EPA) and others in assessing the effectiveness of the program and in determining program modifications.
  • The Department of Revenue administers the day-to-day operations, including:
    • Licensing of inspectors and test facilities.
    • Conducting field audits.
    • Investigating complaints.
    • Processing waivers.
    • Collecting revenues.
    • Working with county governments that issue vehicle registrations.

AIR Program Annual Report:

Each year, CDPHE submits a report to the U.S. Environmental Protection Agency (EPA).  Click on the links below to open a report for the appropriate calendar year.   

AIR Program report for calendar year 2022


Clean Screen Program Reports:

2022 Colorado Clean Screen Program Report