664
AEUS75 KBOU 201511
AQABOU
AIR QUALITY ALERT MESSAGE
COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT
RELAYED BY NATIONAL WEATHER SERVICE BOULDER CO
910 AM MDT MON JUL 20 2026
COC013-069-014-031-123-059-005-035-001-202200-
BOULDER-LARIMER-BROOMFIELD-DENVER-WELD-JEFFERSON-ARAPAHOE-
DOUGLAS-ADAMS-
910 AM MDT MON JUL 20 2026
...OZONE ACTION DAY ALERT FROM 400 PM SUNDAY UNTIL 400 PM
MONDAY...
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 SUNDAY JULY 19 TO 400 PM MONDAY JULY 20
IMPACTS...OZONE ACTION DAY ALERT IS NOW IN EFFECT FOR THE FRONT
RANGE URBAN CORRIDOR. OZONE LEVELS ARE EXPECTED TO REACH THE
UNHEALTHY FOR SENSITIVE GROUPS CATEGORY ON SUNDAY AND MONDAY IN
THE NORTHERN COLORADO FRONT RANGE. ELEVATED LEVELS OF OZONE ARE
POSSIBLE FROM THE DENVER METRO AREA NORTHWARD, INCLUDING FORT
COLLINS AND GREELEY. 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.
MONDAY, JULY 20, 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.
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