Air Quality Alert Message

Full Alert Message

Air Quality Alert Message Colorado Department of Public Health and Environment Relayed by National Weather Service Boulder CO 410 PM MDT Sat Jun 20 2026 ...OZONE ACTION DAY ALERT FROM 400 PM SATURDAY UNTIL 1200 AM SUNDAY... 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 Saturday June 20 to 1200 AM Sunday June 21 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. On Saturday, hot and sunny weather with limited clouds and storms is expected to allow ozone to reach the Unhealthy for Sensitive Groups category in southern and western portion of the Denver Metro area, including the foothills. Breezy and favorable winds will help to keep ozone in the Good to Moderate range on Sunday. 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 midnight, Saturday night, June 20, 2026. 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.