These Colorado counties were given an air quality grade of F,
In terms of the cleanest cities, Colorado did not rank very high. Only two cities made it onto one list: Top 25 cleanest U.S. Cities by year-round particle pollution. » Subscribe to FOX31 on YouTube: https://bit.ly/2PntEm4 » Watch more FOX31 videos: https://bit.ly/3vIWTjd Visit our homepage: https://kdvr.com Download the FOX31 App: https://kdvr.com/apps Subscribe to our newsletters: https://kdvr.com/newsletters FOX31 on Facebook: https://facebook.com/fox31denver FOX31 on Twitter: https://twitter.com/kdvr FOX31 on Instagram: https://instagram.com/fox31denver FOX31 KDVR is your source for news, weather, and sports in Denver and throughout Colorado. We're always covering the latest breaking news 24/7. We bring you Problem Solvers investigations; news stories dedicated to military members, veterans and their families through Serving Those Who Serve; and we cover our state's unique and changing forecast with Pinpoint Weather. #News #Colorado #FOX31