Rocky Mountain National Park Glacier Basin Campground

Air Quality Alert issued July 1 at 9:10AM MDT by NWS Denver CO

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 Tuesday June 30 to 400 PM Wednesday July 01 IMPACTS...Action Day for Multiple Pollutants is now in effect for the Front Range Urban Corridor. Continued hot and sunny weather conditions may allow ozone concentrations to reach the Unhealthy for Sensitive Groups category on Tuesday and Wednesday. The transport of wildfire smoke may increase particle pollution levels, reaching the Unhealthy for Sensitive Groups category, or worse, 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. Wednesday, July 1, 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.