Air Quality

Our mission is to improve air quality by ensuring that all CDOT projects and operations comply with federal, state, and local air quality laws and regulations, and by promoting strategies which reduce emissions of motor vehicle pollutants. In order to ensure legal compliance, CDOT evaluates the air quality impacts of its transportation projects to determine if the project will cause or contribute to a violation of National Ambient Air Quality Standards.

EPA Office of Air Quality Planning and Standards
Air Pollution Control Division of the Colorado Department of Public Health and Environment
Federal Highway Administration Air Quality Website

Guidance Manuals
The CDOT air quality procedure document is currently under review.  Please see guidance available in Chapter 9 and Appendix F of the CDOT NEPA Manual that was last updated in July 2015.

Interested in Electric Vehicles?
CDOT is a partner in Project FEVER- Fostering Electric Vehicle Expansion in the Rockies. The objective of this project is to create a community based electric vehicle infrastructure readiness plan and implement activities in anticipation of larger electric vehicle deployment efforts in the future.

The Electric Ride is the public education and outreach portion of this program. This interactive website is a portal of information that will help drivers get ready, get set, and go with electric vehicles as we work towards an electrified transportation future.

Join the movement at and transform the way we drive!

Click on the Engines Off! Colorado icon to find out more about how you, your business, and your community can help to reduce exhaust emissions from idling cars and trucks. The Engines Off! Colorado website Engines Off! Coloradoprovides strategies, tools, and templates to help create idling policies, active idling reduction programs at schools and businesses, and to help fleets save fuel while reducing the non-operational idling.

The State of Colorado/CDOT is not affiliated with Air Care Colorado:
Air Care Colorado
(303) 456-7090

Ozone Maps

Updated 2016-10-10


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Colorado: The Official State Web Portal