Colorado Unknown Air Quality Alert | Effective 07/10/2026 15:10
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 Friday July 10 to 400 PM Saturday July 11
IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Hot, dry, and stagnant weather will allow
Ozone to reach the Unhealthy for Sensitive Groups category on