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 Thu Jul 2 2026 ...ACTION DAY FOR MULTIPLE POLLUTANTS FROM 400 PM THURSDAY UNTIL 400 PM FRIDAY... The Colorado Department of Public Health and Environment has issued the following... WHAT...Action Day for Multiple Pollutants. WHERE...Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN...400 PM Thursday July 02 to 400 PM Friday July 03 IMPACTS...Action Day for Multiple Pollutants is now in effect for the Front Range Urban Corridor. Ozone concentrations are expected to reach the Unhealthy for Sensitive Groups category on Thursday and Friday. Fine particulate levels are also expected to remain elevated, and may reach the Unhealthy for Sensitive Groups category at times. 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. Friday, July 3, 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...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.