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Staff Publications

Vehicle Tailpipe Emissions Standards

Subject
Transportation & Motor Vehicles
Published
11/20/2018

This memorandum discusses tailpipe vehicle emission standards in the United States and the current regulations for light-duty vehicles. 

Email addresses for the Colorado legislature have changed from the @state.co.us domain to the @coleg.gov domain on December 1, 2022. Details
The effective date for bills enacted without a safety clause (unless otherwise specified) is August 7, 2023. Details
The 2023 Ballot Information Booklet (Blue Book) is now available. Details