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  3. Colorado

Colorado

United States

2026-09-18 13:00
AQI (US)
Good
Pollutants|Pollens
PM10
μg/m³
31.5
PM2.5
μg/m³
4.1
O3
μg/m³
30.3
NO2
μg/m³
20.9
CO
μg/m³
375
SO2
μg/m³
1.9
Weather
  • ℃
  • ℉
5℃
94%
1 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM10
  • PM2.5
  • O3
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 65
Alamosa County
AQI 15
Arapahoe County
AQI 65
Archuleta County
AQI 19
Baca County
AQI 45
Bent County
AQI 46
Boulder County
AQI 14
Broomfield County
AQI 65
Chaffee County
AQI 9
Cheyenne County
AQI 38
Clear Creek County
AQI 16
Conejos County
AQI 15
Costilla County
AQI 13
Crowley County
AQI 24
Custer County
AQI 13
Delta County
AQI 30
Denver County
AQI 65
Dolores County
AQI 4
Douglas County
AQI 65
Eagle County
AQI 14
El Paso County
AQI 33
Elbert County
AQI 45
Fremont County
AQI 17
Garfield County
AQI 1
Gilpin County
AQI 26
Grand County
AQI 12
Gunnison County
AQI 15
Hinsdale County
AQI 7
Huerfano County
AQI 9
Jackson County
AQI 18
Jefferson County
AQI 59
La Plata County
AQI 28
Lake County
AQI 6
Larimer County
AQI 25
Las Animas County
AQI 26
Lincoln County
AQI 27
Logan County
AQI 24
Mesa County
AQI 13
Mineral County
AQI 3
Moffat County
AQI 12
Montezuma County
AQI 18
Montrose County
AQI 30
Morgan County
AQI 56
Otero County
AQI 34
Ouray County
AQI 14
Park County
AQI 14
Phillips County
AQI 19
Pitkin County
AQI 2
Prowers County
AQI 52
Pueblo County
AQI 25
Rio Blanco County
AQI 20
Rio Grande County
AQI 15
Routt County
AQI 15
Saguache County
AQI 11
San Juan County
AQI 14
San Miguel County
AQI 14
Sedgwick County
AQI 20
Summit County
AQI 11
Teller County
AQI 20
Washington County
AQI 34
Weld County
AQI 43
Yuma County
AQI 22
Data Sources
http://www.airnow.gov/

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