Colorado Mobile Sources regulations & environmental compliance analysis

Colorado Mobile Sources: What you need to know

Governing Law and Regulations

Vehicle inspection and maintenance (I/M): 5 Code of Colorado Regulations (CCR) 1001-13 and 5 CCR 1001-15

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Employer trip reduction and commuting: 42 USC 7511a(d)(1)(B)


Gasoline volatility: 40 CFR 80.27

Regulatory Agencies

Colorado Department of Public Health and Environment (CDPHE) Air Pollution Control Division (APCD)

Colorado Department of Revenue Division of Motor Vehicles (DMV)

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. There are many mobile source regulatory requirements implemented nationally by the U.S. Environmental Protection Agency (EPA) that impact mobile sources in Colorado. In addition, the state has established additional programs to implement optional federal programs and state-specific requirements to control mobile source emissions and make progress toward attainment of all the National Ambient Air Quality Standards.

Administration and enforcement. CDPHE's APCD is primarily responsible for the administration and enforcement of the mobile source requirements being implemented in Colorado. The APCD works in conjunction with the DMV to administer and enforce the vehicle I/M program.

State Requirements


5 CCR 1001-13 and 5 CCR 1001-15

Colorado operated both basic and enhanced vehicle inspection programs. See the national section MOBILE SOURCES for more information on basic and enhanced vehicle inspection programs.

Inspection Area and Applicability

Enhanced inspection program. All gasoline- and diesel-powered vehicles in the enhanced inspection program area are subject the emissions inspection requirements. The enhanced inspection program area is Denver Metro Area, which is composed of:

  • Adams County (west of ...

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More on this topic:

Governing Law and Regulations
Regulatory Agencies
Comparison: State vs. Federal
State Requirements

Colorado Mobile Sources Resources

Type Title
Forms Stage II System Decommissioning Notification Form
See all Mobile Sources Resources