OZONE ACTION DAY ALERT FROM 200 PM FRIDAY UNTIL 1200 AM SATURDAY... 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...200 PM Friday May 15 to 1200 AM Saturday May 16 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Ozone may reach the Unhealthy for Sensitive Groups category on Friday. The highest concentrations are expected in Denver, Greeley, and surrounding areas. Stronger winds on Saturday will limit ozone, and Good to Moderate concentrations are expected. For Colorado air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx If possible, please help us reduce pollution by limiting driving gas and diesel-powered vehicles until at least 4 PM Saturday, May 16, 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.