Air Quality Alert issued June 20 at 6:10PM MDT by NWS Denver CO

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 June 20 to 400 PM Saturday June 21

IMPACTS…Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Ozone levels will remain in the Good to
Moderate range on Friday. On Saturday, hot and sunny conditions
will allow ozone to reach the Unhealthy for Sensitive Groups
category. The highest concentrations of ozone are expected in
southern Larimer and Weld Counties, and along the lower foothills
of the Front Range. 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.
Saturday, June 21, 2025. 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.