Air Pollution Control Division

Smoking Vehicle Hotline

Smoking Vehicle E-Mail Line
When e-mailing information about a smoking vehicle, if possible, please include whether the vehicle was diesel or gas powered and include the vehicle's license plate number.

Colorado’s smoking vehicle hotline program is designed to identify smoking vehicles, and to provide owners with information that will encourage them to voluntarily make needed repairs. Repairs to smoking vehicles are required if a vehicle fails a mandatory emissions test because of a visible smoke problem. The cause of such smoke must be corrected before the required emissions sticker can be issued. Also, a police officer may stop a smoking vehicle, issue a ticket and order corrective repairs. A substantial fine may result. 

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