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  3. Colorado

Colorado

United States

2026-05-31 04:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
114.2
PM2.5
μg/m³
2.6
PM10
μg/m³
12.2
NO2
μg/m³
9.7
CO
μg/m³
250
SO2
μg/m³
2.1
Weather
  • ℃
  • ℉
2℃
49%
12 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 69
Alamosa County
AQI 16
Arapahoe County
AQI 72
Archuleta County
AQI 38
Baca County
AQI 13
Bent County
AQI 29
Boulder County
AQI 50
Broomfield County
AQI 17
Chaffee County
AQI 21
Cheyenne County
AQI 26
Clear Creek County
AQI 54
Conejos County
AQI 16
Costilla County
AQI 31
Crowley County
AQI 31
Custer County
AQI 28
Delta County
AQI 13
Denver County
AQI 52
Dolores County
AQI 46
Douglas County
AQI 72
Eagle County
AQI 14
El Paso County
AQI 66
Elbert County
AQI 37
Fremont County
AQI 9
Garfield County
AQI 44
Gilpin County
AQI 54
Grand County
AQI 15
Gunnison County
AQI 54
Hinsdale County
AQI 26
Huerfano County
AQI 33
Jackson County
AQI 8
Jefferson County
AQI 59
La Plata County
AQI 48
Lake County
AQI 19
Larimer County
AQI 44
Las Animas County
AQI 27
Lincoln County
AQI 23
Logan County
AQI 19
Mesa County
AQI 49
Mineral County
AQI 42
Moffat County
AQI 6
Montezuma County
AQI 54
Montrose County
AQI 13
Morgan County
AQI 21
Otero County
AQI 34
Ouray County
AQI 14
Park County
AQI 17
Phillips County
AQI 21
Pitkin County
AQI 50
Prowers County
AQI 25
Pueblo County
AQI 54
Rio Blanco County
AQI 6
Rio Grande County
AQI 16
Routt County
AQI 13
Saguache County
AQI 27
San Juan County
AQI 14
San Miguel County
AQI 14
Sedgwick County
AQI 20
Summit County
AQI 16
Teller County
AQI 9
Washington County
AQI 21
Weld County
AQI 40
Yuma County
AQI 22
Data Sources
http://www.airnow.gov/

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