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  3. Colorado

Colorado

United States

2026-09-21 08:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
63.2
PM2.5
μg/m³
3.7
PM10
μg/m³
10.3
NO2
μg/m³
8.7
CO
μg/m³
229.2
SO2
μg/m³
0.8
Weather
  • ℃
  • ℉
2℃
77%
4 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 27
Alamosa County
AQI 18
Arapahoe County
AQI 28
Archuleta County
AQI 24
Baca County
AQI 21
Bent County
AQI 16
Boulder County
AQI 38
Broomfield County
AQI 24
Chaffee County
AQI 22
Cheyenne County
AQI 16
Clear Creek County
AQI 27
Conejos County
AQI 18
Costilla County
AQI 10
Crowley County
AQI 10
Custer County
AQI 13
Delta County
AQI 25
Denver County
AQI 29
Dolores County
AQI 14
Douglas County
AQI 27
Eagle County
AQI 31
El Paso County
AQI 35
Elbert County
AQI 18
Fremont County
AQI 20
Garfield County
AQI 22
Gilpin County
AQI 28
Grand County
AQI 25
Gunnison County
AQI 25
Hinsdale County
AQI 21
Huerfano County
AQI 9
Jackson County
AQI 26
Jefferson County
AQI 31
La Plata County
AQI 27
Lake County
AQI 26
Larimer County
AQI 24
Las Animas County
AQI 9
Lincoln County
AQI 11
Logan County
AQI 7
Mesa County
AQI 30
Mineral County
AQI 12
Moffat County
AQI 24
Montezuma County
AQI 33
Montrose County
AQI 25
Morgan County
AQI 10
Otero County
AQI 13
Ouray County
AQI 25
Park County
AQI 24
Phillips County
AQI 15
Pitkin County
AQI 27
Prowers County
AQI 17
Pueblo County
AQI 24
Rio Blanco County
AQI 33
Rio Grande County
AQI 18
Routt County
AQI 20
Saguache County
AQI 17
San Juan County
AQI 25
San Miguel County
AQI 25
Sedgwick County
AQI 11
Summit County
AQI 23
Teller County
AQI 25
Washington County
AQI 10
Weld County
AQI 21
Yuma County
AQI 18
Data Sources
http://www.airnow.gov/

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AQI 22
Georgetown
AQI 28
Breckenridge
AQI 24
Silverthorne
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Frisco
AQI 25
Wildernest
AQI 25
Bailey
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Winter Park
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