Clean Air Challenge 2017
putting her helmet on

Clean Air Challenge 2017

July 1 – August 31

Leave Your Car Home & Win!clean air challenge logo

Leave your car at home one or more days a week during the high Ozone months of July and August, and you could win:

  • Grand Prize: $500 gift card (choice of Amazon, Apple Store, or REI)
  • Runner-up Prizes: $100 REI gift cards
  • Prizes just for participating

Reduce ground-level ozone and greenhouse gas emissions.


Registration works best using Chrome, Firefox, or Internet Explorer 10/11 or higher.
Email or call 303-441-1147 if you have questions.

Clean Air Challenge Winners 2016


sponsors for clean air challenge

Contact Us

Air Quality Program

Main: 303-441-1564
Submit a question


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