Colorado Air Quality Summary

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

Air Quality Advisories Front Range: Action Day for Ozone - The Colorado Department of Public Health and Environment and the Regional Air Quality Council have issued an OZONE ACTION DAY ALERT at 4 p.m. on Wednesday, August 15, 2018 for the Front Range Urban (click for more...) Other Areas: Air Quality Health Advisory for Wildfire Smoke Issued for large portions of western Colorado Issued at 8:00 AM MDT, Wednesday, August 15, 2018 Issued by the Colorado Department of Public Health and Environment Affected Area: large portions of western Colorado, including Moffat, Routt, Jackson, Grand, Rio Blanco, Garfield, Eagle, Summit, Mesa, Delta, Pitkin, Gunnison, Lake, Chaffee, Park, Montrose, Ouray, San Miguel, Dolores, San Juan, Montezuma, and La Plata Counties. Locations and points of interest include, but are not limited to Craig, Steamboat Springs, Walden, Hot Sulphur Springs, Meeker, Rifle, Glenwood Springs, Eagle, Breckenridge, Grand Junction, Delta, Aspen, Gunnison, Leadville, Salida, Fairplay, Montrose, Ouray, Telluride, Dove Creek, Silverton, Cortez, and Durango. Advisory in Effect: 8:00 AM MDT, Wednesday, August 15, 2018 to 9:00 AM MDT, Thursday, August 16, (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

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