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Emission Information
Air Pollution
Motor vehicles are among the largest contributors to harmful air pollution that causes adverse health effects. To battle this, the state of Colorado has established a vehicle emission-testing program designed to help improve air quality in and around Denver, Boulder and the Northern Front Range. The seller is responsible for a new emission test.
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Diesel-Powered Vehicles
Diesel vehicles receive a four-year exemption (from model year) and are categorized in two groups (Light Duty / Heavy Duty) for emission-testing purposes.
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Emission Inspection Changes
Read about emission changes in your community.
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Gasoline-Powered Vehicles
These vehicles receive a seven year exemption (from model year) and are categorized in two groups for emission-testing purposes.
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Hybrid-Powered Vehicles
Hybrid Powered Vehicles are subject to On Board Diagnostic (OBD) testing and will follow the Gasoline-Powered Vehicles testing cycle.
Motorcycles are not subject to emission testing at this time.