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  3. Colorado

Colorado

United States

2026-09-21 11:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
56
PM2.5
μg/m³
3.8
PM10
μg/m³
10.5
NO2
μg/m³
12.5
CO
μg/m³
187.5
SO2
μg/m³
0.9
Weather
  • ℃
  • ℉
0℃
81%
1 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 22
Alamosa County
AQI 23
Arapahoe County
AQI 36
Archuleta County
AQI 14
Baca County
AQI 20
Bent County
AQI 16
Boulder County
AQI 32
Broomfield County
AQI 22
Chaffee County
AQI 24
Cheyenne County
AQI 18
Clear Creek County
AQI 26
Conejos County
AQI 23
Costilla County
AQI 11
Crowley County
AQI 10
Custer County
AQI 16
Delta County
AQI 24
Denver County
AQI 28
Dolores County
AQI 15
Douglas County
AQI 36
Eagle County
AQI 32
El Paso County
AQI 39
Elbert County
AQI 23
Fremont County
AQI 22
Garfield County
AQI 17
Gilpin County
AQI 23
Grand County
AQI 26
Gunnison County
AQI 22
Hinsdale County
AQI 23
Huerfano County
AQI 7
Jackson County
AQI 29
Jefferson County
AQI 34
La Plata County
AQI 20
Lake County
AQI 27
Larimer County
AQI 29
Las Animas County
AQI 5
Lincoln County
AQI 11
Logan County
AQI 5
Mesa County
AQI 24
Mineral County
AQI 13
Moffat County
AQI 26
Montezuma County
AQI 32
Montrose County
AQI 24
Morgan County
AQI 9
Otero County
AQI 12
Ouray County
AQI 25
Park County
AQI 27
Phillips County
AQI 13
Pitkin County
AQI 26
Prowers County
AQI 13
Pueblo County
AQI 24
Rio Blanco County
AQI 35
Rio Grande County
AQI 23
Routt County
AQI 20
Saguache County
AQI 19
San Juan County
AQI 25
San Miguel County
AQI 25
Sedgwick County
AQI 9
Summit County
AQI 24
Teller County
AQI 10
Washington County
AQI 10
Weld County
AQI 25
Yuma County
AQI 17
Data Sources
http://www.airnow.gov/

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