Air Quality Alert
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
629 AEUS75 KBOU 210211 AQABOU Air Quality Alert Message Colorado Department of Public Health and Environment Relayed by National Weather Service Boulder CO 810 PM MDT Wed Aug 20 2025 COC031-123-035-014-013-059-069-005-001-212200- Denver-Weld-Douglas-Broomfield-Boulder-Jefferson-Larimer- Arapahoe-Adams- 810 PM MDT Wed Aug 20 2025 ...OZONE ACTION DAY ALERT FROM 400 PM WEDNESDAY UNTIL 400 PM THURSDAY... The Colorado Department of Public Health and Environment has issued the following... WHAT...Ozone Action Day Alert. WHERE...Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN...400 PM Wednesday August 20 to 400 PM Thursday August 21 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Hot, stagnant weather will allow ozone to reach the Unhealthy for Sensitive Groups category on Wednesday and Thursday. For Colorado air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx If possible, please help us reduce ozone pollution by limiting driving gas and diesel-powered vehicles until at least 4 p.m. Thursday, August 21, 2025. Colorado is also addressing ozone pollution through state policies. For more information about health impacts and how ozone pollution forms in Colorado, visit: https://cdphe.colorado.gov/ozone-pollution-and-your-health HEALTH INFORMATION...Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with lung disease, such as asthma. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion. $$ COC117-211500- Summit- 810 PM MDT Wed Aug 20 2025 ...AIR QUALITY HEALTH ADVISORY FOR WILDFIRE SMOKE FROM 430 PM WEDNESDAY UNTIL 900 AM THURSDAY... The Colorado Department of Public Health and Environment has issued the following... WHAT...Air Quality Health Advisory for Wildfire Smoke. WHERE...Eagle, Pitkin, Summit, and Lake Counties. Locations include, but are not limited to Gypsum, Eagle, Vail, Basalt, Woody Creek, Aspen, Frisco, Silverthorne, Breckenridge, and Leadville. WHEN...430 PM Wednesday August 20 to 900 AM Thursday August 21 IMPACTS...Smoke from the Derby Fire is impacting central Colorado. The heaviest smoke is expected in areas near the fire, but moderate to heavy smoke is possible throughout the advisory area overnight Wednesday and into Thursday morning. HEALTH INFORMATION...Public Health Recommendations: If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and older adults. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels that are unhealthy. $$