CDPHE Air Pollution

Ozone levels in the Unhealthy for Sensitive Groups category are possible on Mon & Tues in the N Colorado Front Range, including the Denver Metro area, Ft Collins, Greeley, & surrounding areas. Move activity indoors or reduce exertion if possible. colorado.gov/airquality/adv…

Elevated ozone from Denver southward to Colorado Springs and Pueblo Monday afternoon and evening, including the adjacent foothills and high plains. Limit outdoor exercise, esp. those with asthma or other respiratory ailments. colorado.gov/airquality/col…

Although air quality has improved across parts of eastern Colorado, smoke lingers in southeastern parts of the state. Air Quality Advisory extended thru 9am Saturday. colorado.gov/airquality/col… colosmokeoutlook.blogspot.com

Air Quality Health Advisory for Wildfire Smoke for large parts of eastern Colorado. Improving air quality during the morning for northeastern Colorado, but smoke could linger into this afternoon for southeastern parts of the state. colorado.gov/airquality/col… colosmokeoutlook.blogspot.com

An Air Quality Health Advisory for Blowing Dust has been issued for large portions of eastern Colorado until 7 PM on Tuesday. High winds will cause blowing dust & potentially hazardous conditions. Stay indoors & reduce heavy exertion if possible on Tues. colorado.gov/airquality/col…

Multiple wildfires are producing smoke in areas of eastern Yuma and Kit Carson Counties. An Air Quality Health Advisory for Wildfire Smoke has been issued for this area. colorado.gov/airquality/col… #cofire

An Air Quality Health Advisory is in effect for northwestern and north-central Colorado. For more details: colorado.gov/airquality/col…

Smoke from out-of-state fires is moving into NW and north-central CO. An Air Quality Health Advisory for Wildfire Smoke has been issued in this area. Take steps to reduce exposure and limit heavy exertion, especially if sensitive to particulates (smoke). colorado.gov/airquality/col…

Smoke from out-of-state fires is increasing particulates and ozone in the Front Range. Action Day for Multiple Pollutants has been issued until at least 4 pm Fri. Reducing heavy exertion, especially for folks with heart or lung ailments, is recommended. colorado.gov/airquality/adv…

Wet weather will be increasing across western Colorado this weekend. In the meantime, periods of heavy smoke will continue for parts of Garfield, Eagle, Dolores, and Montezuma Counties. colorado.gov/airquality/col… colosmokeoutlook.blogspot.com #cofire #stonermesafire #derbyfire

Air Quality Health Advisories continue through Saturday morning for parts of central and southwest Colorado. Good news -- welcome moisture is on the way. #cofire colorado.gov/airquality/col… colosmokeoutlook.blogspot.com #stonermesafire #derbyfire

An Ozone Action Day alert is in effect until midnight Thursday night. If you're sensitive to ozone, avoid outdoor activities until 8 pm. Ozone is expected to improve on Friday, as breezy weather rolls in. For more information: colorado.gov/airquality/adv…

Two Air Quality Health Advisories are in effect- one in central Colorado, and one in southwestern Colorado. Moderate to heavy smoke is expected near the Derby Fire and Stoner Mesa Fire. For more info: colorado.gov/airquality/col… Latest smoke blog: colosmokeoutlook.blogspot.com/2025/08/smoky-…

An Ozone Action Day Alert is in effect until at least 4 PM Thursday. Hot and stagnant weather is expected on the Front Range, and ozone is expected to reach the Unhealthy for Sensitive Groups category on Wednesday and Thursday. For more info: colorado.gov/airquality/adv…

An Air Quality Health Advisory for Wildfire Smoke is in effect for Eagle, Summit, Pitkin, and Lake Counties. For more information: colorado.gov/airquality/col… Read the latest smoke blog here: colosmokeoutlook.blogspot.com/2025/08/air-qu…

Ozone will remain in the Good to Moderate range on Tuesday. On Wednesday, ozone is expected to reach the Unhealthy for Sensitive Groups category. Sensitive to ozone? Consider reducing outdoor exertion from 12-8 pm on Wednesday. For more information: colorado.gov/airquality/adv…

Air Quality Health Advisories continue today for parts of western Colorado. The good news? Smoke has improved for a large portion of the state. Find more smoke information here: colosmokeoutlook.blogspot.com/2025/08/signif… Advisory details: colorado.gov/airquality/col…

Fires & smoke still creating air quality issues in SW & NW CO. Air Quality Health Advisories remain in effect on Thurs & Fri. Stay up-to-date on changing expectations by checking advisory info: colorado.gov/airquality/def… , and the Colorado Smoke Blog: colosmokeoutlook.blogspot.com #cofire

Air Quality Health Advisory for Wildfire Smoke continues for multiple counties across western Colorado. Hazy skies over Eagle Wednesday morning. colorado.gov/airquality/col… weathercams.faa.gov colosmokeoutlook.blogspot.com #cofire

Air Quality Health Advisories for Wildfire Smoke have been expanded to include more counties in western Colorado. Telluride, Gunnison, Delta, and Silverton all included in the larger advisory footprints. colorado.gov/airquality/col…