Ozone Action Day Alert
Effective: 7/6/2026 4:00:00 PM - 7/7/2026 4:00:00 PM
Affected Area: Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties

Public Health Recommendations: Greater likelihood of respiratory symptoms and breathing difficulty in active children and adults and people with lung disease, such as asthma; possible respiratory effects in general...
Outlook: Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Hot and smoky weather conditions will result in ozone concentrations reaching the Unhealthy for Sensitive Groups category...

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Air Quality Health Advisory for Wildfire Smoke
Effective: 7/6/2026 9:00:00 AM - 7/7/2026 9:00:00 AM
Affected Area: Delta, Montrose, San Miguel, Dolores, Ouray, Montezuma, La Plata, San Juan, Hinsdale, Mineral, Saguache, Gunnison, Chaffee, Lake, Summit, Custer, Pueblo, Fremont, Park and Mesa Counties. Locations include, but are not limited to Delta, Montrose, Nucla, Telluride, Dove Creek, Ouray, Cortez, Durango, Hermosa, Honeyville, Rockwood, Silverton, Lake City, Creede, Saguache, Gunnison, Buena Vista, Salida, Leadville, Breckenridge, Westcliffe, Pueblo, Canon City, Fairplay and Grand Junction.

Public Health Recommendations: Public Health Recommendations: 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...
Outlook: Moderate to heavy smoke from several wildfires in Colorado and Utah will be possible within the advisory area through at least Tuesday morning.

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