Overview
The Colorado Air Pollution Control Division (APCD), Mobile Sources Unit staff are authorized to investagete reported violations of Colorado Regulations for catalytic converter sales and replacement (AQCC Regulation 20) and/or violations of the Colorado prohibitions on Tampering with motor vehicle emissions controls (C.R.S. §25-7-144).
Imporper catalytic converters or tampered emissions control sytems cause excess air pollution and may prevent you from being able to register your vehicle.
In Colorado, the seller of a vehcile is responsible for providing a passing emissions certification, if one is required. It is prohibited to sell a tampered motor vehicle in the state of Colorado.
Please complete this form to notify APCD if you believe an unauthorized catalytic converter installation or emissions system tamper has occurred with your vehicle or if you purchased a vehicle that may not be in compliance.
You may also use this form if you have specific knowledge of a person or business engaging in prohibited emissions repair or tampering.
APCD staff are not permitted to give legal advice.