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  3. Colorado

Colorado

United States

2026-09-19 20:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
91.9
PM2.5
μg/m³
2
PM10
μg/m³
6.9
NO2
μg/m³
3.8
CO
μg/m³
145.8
SO2
μg/m³
1.4
Weather
  • ℃
  • ℉
12℃
34%
17 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 42
Alamosa County
AQI 12
Arapahoe County
AQI 45
Archuleta County
AQI 37
Baca County
AQI 17
Bent County
AQI 17
Boulder County
AQI 43
Broomfield County
AQI 5
Chaffee County
AQI 3
Cheyenne County
AQI 15
Clear Creek County
AQI 37
Conejos County
AQI 12
Costilla County
AQI 5
Crowley County
AQI 12
Custer County
AQI 5
Delta County
AQI 12
Denver County
AQI 41
Dolores County
AQI 9
Douglas County
AQI 43
Eagle County
AQI 4
El Paso County
AQI 40
Elbert County
AQI 26
Fremont County
AQI 12
Garfield County
AQI 37
Gilpin County
AQI 34
Grand County
AQI 4
Gunnison County
AQI 38
Hinsdale County
AQI 5
Huerfano County
AQI 4
Jackson County
AQI 5
Jefferson County
AQI 41
La Plata County
AQI 38
Lake County
AQI 3
Larimer County
AQI 40
Las Animas County
AQI 5
Lincoln County
AQI 16
Logan County
AQI 10
Mesa County
AQI 36
Mineral County
AQI 6
Moffat County
AQI 7
Montezuma County
AQI 36
Montrose County
AQI 12
Morgan County
AQI 16
Otero County
AQI 12
Ouray County
AQI 7
Park County
AQI 4
Phillips County
AQI 8
Pitkin County
AQI 38
Prowers County
AQI 18
Pueblo County
AQI 47
Rio Blanco County
AQI 7
Rio Grande County
AQI 12
Routt County
AQI 13
Saguache County
AQI 5
San Juan County
AQI 7
San Miguel County
AQI 7
Sedgwick County
AQI 8
Summit County
AQI 4
Teller County
AQI 24
Washington County
AQI 11
Weld County
AQI 47
Yuma County
AQI 10
Data Sources
http://www.airnow.gov/

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