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 810 PM MDT Sun Jul 19 2026 ...OZONE ACTION DAY ALERT FROM 400 PM SUNDAY UNTIL 400 PM MONDAY... 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 Sunday July 19 to 400 PM Monday July 20 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Ozone levels are expected to reach the Unhealthy for Sensitive Groups category on Sunday and Monday in the northern Colorado Front Range. Elevated levels of ozone are possible from the Denver Metro area northward, including Fort Collins and Greeley. 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. Monday, July 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.