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  3. Colorado

Colorado

United States

2026-09-21 16:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
79.5
PM2.5
μg/m³
5
PM10
μg/m³
19.3
NO2
μg/m³
12.7
CO
μg/m³
250
SO2
μg/m³
1.6
Weather
  • ℃
  • ℉
12℃
28%
11 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 51
Alamosa County
AQI 20
Arapahoe County
AQI 45
Archuleta County
AQI 32
Baca County
AQI 6
Bent County
AQI 4
Boulder County
AQI 36
Broomfield County
AQI 49
Chaffee County
AQI 13
Cheyenne County
AQI 10
Clear Creek County
AQI 29
Conejos County
AQI 20
Costilla County
AQI 11
Crowley County
AQI 4
Custer County
AQI 10
Delta County
AQI 27
Denver County
AQI 51
Dolores County
AQI 9
Douglas County
AQI 45
Eagle County
AQI 15
El Paso County
AQI 38
Elbert County
AQI 19
Fremont County
AQI 17
Garfield County
AQI 27
Gilpin County
AQI 40
Grand County
AQI 15
Gunnison County
AQI 24
Hinsdale County
AQI 16
Huerfano County
AQI 8
Jackson County
AQI 15
Jefferson County
AQI 49
La Plata County
AQI 35
Lake County
AQI 12
Larimer County
AQI 35
Las Animas County
AQI 5
Lincoln County
AQI 7
Logan County
AQI 3
Mesa County
AQI 29
Mineral County
AQI 10
Moffat County
AQI 20
Montezuma County
AQI 40
Montrose County
AQI 27
Morgan County
AQI 4
Otero County
AQI 4
Ouray County
AQI 18
Park County
AQI 13
Phillips County
AQI 3
Pitkin County
AQI 39
Prowers County
AQI 13
Pueblo County
AQI 42
Rio Blanco County
AQI 17
Rio Grande County
AQI 20
Routt County
AQI 29
Saguache County
AQI 14
San Juan County
AQI 18
San Miguel County
AQI 18
Sedgwick County
AQI 3
Summit County
AQI 15
Teller County
AQI 22
Washington County
AQI 3
Weld County
AQI 31
Yuma County
AQI 3
Data Sources
http://www.airnow.gov/

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