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