Air Quality Alert: Adams, CO; Arapahoe, CO; Weld, CO; Larimer, CO; Boulder, CO; Jefferson, CO; Broomfield, CO; Denver, CO; Douglas, CO

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Air Quality Alert — Adams, CO; Arapahoe, CO; Weld, CO; Larimer, CO; Boulder, CO; Jefferson, CO; Broomfield, CO; Denver, CO; Douglas, CO Severity: Unknown. Certainty: Unknown. 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 August 01 to 400 PM Sunday August 02 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Hot and sunny weather with light winds will allow ozone to reach the Unhealthy for Sensitive Groups category on Saturday and Sunday. Elevated levels of ozone are possible throughout the northern Front Range region, with the highest concentrations most likely in the western portions of the Front Range. 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. Sunday, August 2, 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.