896
AEUS75 KBOU 172211
AQABOU

Air Quality Alert Message
Colorado Department of Public Health and Environment
Relayed by National Weather Service Boulder CO
410 PM MDT Mon Aug 17 2026

COC014-001-069-059-031-013-123-005-035-182200-
Broomfield-Adams-Larimer-Jefferson-Denver-Boulder-Weld-
Arapahoe-Douglas-
410 PM MDT Mon Aug 17 2026

...OZONE ACTION DAY ALERT FROM 400 PM MONDAY UNTIL 400 PM
TUESDAY...

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 Monday August 17 to 400 PM Tuesday August 18

IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor.  A decreasing threat for showers and
thunderstorms along with very warm temperatures will result in
ozone concentrations reaching the Unhealthy for Sensitive Groups
category both Monday and Tuesday during the afternoon and evening
hours. The best chance for those higher ozone levels will be in
and near the Denver metro area, including the local foothills.
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.
Tuesday, August 18, 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...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.

$$