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  3. Colorado

Colorado

United States

2026-09-20 15:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
48.3
PM2.5
μg/m³
2.7
PM10
μg/m³
12.6
NO2
μg/m³
11.1
CO
μg/m³
229.2
SO2
μg/m³
1.8
Weather
  • ℃
  • ℉
9℃
44%
19 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 21
Alamosa County
AQI 16
Arapahoe County
AQI 26
Archuleta County
AQI 19
Baca County
AQI 5
Bent County
AQI 6
Boulder County
AQI 21
Broomfield County
AQI 22
Chaffee County
AQI 5
Cheyenne County
AQI 4
Clear Creek County
AQI 19
Conejos County
AQI 16
Costilla County
AQI 8
Crowley County
AQI 8
Custer County
AQI 7
Delta County
AQI 15
Denver County
AQI 20
Dolores County
AQI 8
Douglas County
AQI 23
Eagle County
AQI 11
El Paso County
AQI 28
Elbert County
AQI 15
Fremont County
AQI 11
Garfield County
AQI 16
Gilpin County
AQI 27
Grand County
AQI 6
Gunnison County
AQI 15
Hinsdale County
AQI 13
Huerfano County
AQI 6
Jackson County
AQI 9
Jefferson County
AQI 26
La Plata County
AQI 18
Lake County
AQI 6
Larimer County
AQI 30
Las Animas County
AQI 9
Lincoln County
AQI 6
Logan County
AQI 4
Mesa County
AQI 22
Mineral County
AQI 7
Moffat County
AQI 18
Montezuma County
AQI 25
Montrose County
AQI 15
Morgan County
AQI 6
Otero County
AQI 8
Ouray County
AQI 18
Park County
AQI 5
Phillips County
AQI 4
Pitkin County
AQI 15
Prowers County
AQI 13
Pueblo County
AQI 24
Rio Blanco County
AQI 21
Rio Grande County
AQI 16
Routt County
AQI 13
Saguache County
AQI 9
San Juan County
AQI 18
San Miguel County
AQI 18
Sedgwick County
AQI 4
Summit County
AQI 7
Teller County
AQI 12
Washington County
AQI 4
Weld County
AQI 20
Yuma County
AQI 5
Data Sources
http://www.airnow.gov/

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