117
AEUS75 KBOU 120210
AQABOU
AIR QUALITY ALERT MESSAGE
COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT
RELAYED BY NATIONAL WEATHER SERVICE BOULDER CO
810 PM MDT TUE AUG 11 2026
COC035-013-031-123-069-001-014-005-059-120600-
DOUGLAS-BOULDER-DENVER-WELD-LARIMER-ADAMS-BROOMFIELD-
ARAPAHOE-JEFFERSON-
810 PM MDT TUE AUG 11 2026
...OZONE ACTION DAY ALERT FROM 400 PM TUESDAY UNTIL 1200 AM
WEDNESDAY...
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 TUESDAY AUGUST 11 TO 1200 AM WEDNESDAY AUGUST 12
IMPACTS...OZONE ACTION DAY ALERT IS NOW IN EFFECT FOR THE FRONT
RANGE URBAN CORRIDOR. ON TUESDAY, HOT AND STAGNANT WEATHER WILL
ALLOW OZONE TO REACH THE UNHEALTHY FOR SENSITIVE GROUPS LEVEL. ON
WEDNESDAY, UNSETTLED WEATHER AND SCATTERED SHOWERS WILL LIMIT
OZONE DEVELOPMENT, AND MODERATE CONCENTRATIONS ARE EXPECTED. 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 MIDNIGHT, TUESDAY
NIGHT, AUGUST 11, 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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page