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: No advisories at this time. (click for more...) Other Areas: Air Quality Health Advisory for Wildfire Smoke Issued for portions of central and southern Colorado Issued at 8:00 AM MDT, Friday, October 18, 2019 Issued by the Colorado Department of Public Health and Environment Affected Area: southeastern Chaffee and northwestern Fremont Counties, including, but not limited to the communities of Wellsville, Howard, Coaldale, and Cotopaxi. Advisory in Effect: 8:00 AM MDT, Friday, October 18, 2019 to 9:00 AM MDT, Saturday, October 19, 2019. Public Health Recommendations: If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and the elderly. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present (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.