Did you know that Colorado has a Smoking Vehicle Hotline where you can anonymously call in or email information regarding vehicles that you see on the road that have really bad exhaust?!? All you need is the Colorado vehicle’s license plate number. Once you call it in, the CDPHE will send the owner of the vehicle a notification to take an emissions test; and if they fail the test; repairs will be required.
The hotline number is 303-692-3211 and the hotline email is email@example.com.
Please do not call or email while driving!