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 western parts of Grand County Issued at 8:30 AM MDT, Sunday, September 23, 2018 Issued by the Colorado Department of Public Health and Environment Affected Area: western parts of Grand County Advisory in Effect: 8:30 AM MDT, Sunday, September 23, 2018 to 9:00 AM MDT, Monday, September 24, 2018. 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 indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels (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

Sunday Ozone Fine Particulates Carbon Monoxide Nitrogen Dioxide    Denver - Boulder     Colorado Springs     Ft. Collins     Greeley     Grand Junction     Colorado River Valley     Four Corners Area  Monday 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 (Sunday): Denver's expected visibility (Monday):