About the Air Quality Index (AQI) Today's Air Quality Summary (detailed)

Air Quality Advisories Denver: Action Day for Visibility Burning Restricted - Limited atmospheric mixing combined with light winds will result in Poor visibility on Friday. (click for more...) Other Areas: No advisories at this time. (click for more...)

Key What is an Action Day?

Current - Air Quality Summary

Denver's current visibility: Ft. Collins' current visibility: (VSI is calculated between 12PM and 4PM local time)

More about air quality forecasting regions...

Forecast - Air Quality Summary

Friday Ozone Fine Particulates Carbon Monoxide Nitrogen Dioxide    Denver - Boulder     Colorado Springs     Ft. Collins     Greeley     Grand Junction     Colorado River Valley     Four Corners Area  Saturday Ozone Fine Particulates Carbon Monoxide Nitrogen Dioxide    Denver - Boulder     Colorado Springs     Ft. Collins     Greeley     Grand Junction     Colorado River Valley     Four Corners Area  Denver's expected visibility (Friday): Denver's expected visibility (Saturday): The AQI & VSI forecast for Saturday will be available by 4PM local time on Friday.