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  3. Colorado

Colorado

United States

2026-09-18 02:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
55.3
PM2.5
μg/m³
4
PM10
μg/m³
17.8
NO2
μg/m³
16.2
CO
μg/m³
354.2
SO2
μg/m³
1.3
Weather
  • ℃
  • ℉
7℃
97%
3 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 30
Alamosa County
AQI 16
Arapahoe County
AQI 29
Archuleta County
AQI 22
Baca County
AQI 50
Bent County
AQI 57
Boulder County
AQI 21
Broomfield County
AQI 22
Chaffee County
AQI 8
Cheyenne County
AQI 44
Clear Creek County
AQI 26
Conejos County
AQI 23
Costilla County
AQI 22
Crowley County
AQI 56
Custer County
AQI 17
Delta County
AQI 16
Denver County
AQI 23
Dolores County
AQI 11
Douglas County
AQI 25
Eagle County
AQI 15
El Paso County
AQI 38
Elbert County
AQI 27
Fremont County
AQI 33
Garfield County
AQI 18
Gilpin County
AQI 20
Grand County
AQI 8
Gunnison County
AQI 20
Hinsdale County
AQI 14
Huerfano County
AQI 23
Jackson County
AQI 16
Jefferson County
AQI 27
La Plata County
AQI 23
Lake County
AQI 7
Larimer County
AQI 26
Las Animas County
AQI 48
Lincoln County
AQI 41
Logan County
AQI 30
Mesa County
AQI 25
Mineral County
AQI 21
Moffat County
AQI 8
Montezuma County
AQI 26
Montrose County
AQI 16
Morgan County
AQI 23
Otero County
AQI 60
Ouray County
AQI 23
Park County
AQI 9
Phillips County
AQI 39
Pitkin County
AQI 7
Prowers County
AQI 55
Pueblo County
AQI 31
Rio Blanco County
AQI 11
Rio Grande County
AQI 23
Routt County
AQI 16
Saguache County
AQI 19
San Juan County
AQI 23
San Miguel County
AQI 22
Sedgwick County
AQI 42
Summit County
AQI 8
Teller County
AQI 23
Washington County
AQI 24
Weld County
AQI 33
Yuma County
AQI 39
Data Sources
http://www.airnow.gov/

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