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  3. Colorado

Colorado

United States

2026-09-20 21:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
114.5
PM2.5
μg/m³
2.6
PM10
μg/m³
10.8
NO2
μg/m³
4.1
CO
μg/m³
187.5
SO2
μg/m³
1.6
Weather
  • ℃
  • ℉
12℃
25%
21 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 63
Alamosa County
AQI 10
Arapahoe County
AQI 60
Archuleta County
AQI 51
Baca County
AQI 7
Bent County
AQI 7
Boulder County
AQI 60
Broomfield County
AQI 19
Chaffee County
AQI 11
Cheyenne County
AQI 5
Clear Creek County
AQI 48
Conejos County
AQI 12
Costilla County
AQI 6
Crowley County
AQI 9
Custer County
AQI 7
Delta County
AQI 16
Denver County
AQI 51
Dolores County
AQI 11
Douglas County
AQI 57
Eagle County
AQI 10
El Paso County
AQI 49
Elbert County
AQI 30
Fremont County
AQI 11
Garfield County
AQI 50
Gilpin County
AQI 54
Grand County
AQI 10
Gunnison County
AQI 48
Hinsdale County
AQI 10
Huerfano County
AQI 5
Jackson County
AQI 10
Jefferson County
AQI 77
La Plata County
AQI 48
Lake County
AQI 10
Larimer County
AQI 50
Las Animas County
AQI 7
Lincoln County
AQI 7
Logan County
AQI 4
Mesa County
AQI 49
Mineral County
AQI 9
Moffat County
AQI 10
Montezuma County
AQI 47
Montrose County
AQI 16
Morgan County
AQI 7
Otero County
AQI 10
Ouray County
AQI 12
Park County
AQI 10
Phillips County
AQI 5
Pitkin County
AQI 40
Prowers County
AQI 19
Pueblo County
AQI 46
Rio Blanco County
AQI 11
Rio Grande County
AQI 12
Routt County
AQI 20
Saguache County
AQI 9
San Juan County
AQI 12
San Miguel County
AQI 11
Sedgwick County
AQI 5
Summit County
AQI 10
Teller County
AQI 13
Washington County
AQI 4
Weld County
AQI 50
Yuma County
AQI 5
Data Sources
http://www.airnow.gov/

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Cities Nearby

Keystone
AQI 30
Georgetown
AQI 48
Breckenridge
AQI 10
Silverthorne
AQI 9
Frisco
AQI 9
Wildernest
AQI 9
Bailey
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Idaho Springs
AQI 49
Copper Mountain
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Black Hawk
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Winter Park
AQI 29