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Colorado

United States

2026-09-21 13:00
AQI (China)
Excellent
Pollutants|Pollens
PM10
μg/m³
20.4
O3
μg/m³
42.2
NO2
μg/m³
23.5
PM2.5
μg/m³
4.7
CO
μg/m³
458.3
SO2
μg/m³
1.4
Weather
  • ℃
  • ℉
4℃
64%
6 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • PM10
  • O3
  • NO2
  • PM2.5
  • CO
  • SO2
Places included
Adams County
AQI 35
Alamosa County
AQI 26
Arapahoe County
AQI 35
Archuleta County
AQI 11
Baca County
AQI 4
Bent County
AQI 4
Boulder County
AQI 15
Broomfield County
AQI 35
Chaffee County
AQI 7
Cheyenne County
AQI 6
Clear Creek County
AQI 15
Conejos County
AQI 26
Costilla County
AQI 7
Crowley County
AQI 3
Custer County
AQI 5
Delta County
AQI 18
Denver County
AQI 35
Dolores County
AQI 4
Douglas County
AQI 35
Eagle County
AQI 9
El Paso County
AQI 25
Elbert County
AQI 8
Fremont County
AQI 6
Garfield County
AQI 9
Gilpin County
AQI 17
Grand County
AQI 7
Gunnison County
AQI 16
Hinsdale County
AQI 9
Huerfano County
AQI 4
Jackson County
AQI 8
Jefferson County
AQI 31
La Plata County
AQI 14
Lake County
AQI 8
Larimer County
AQI 11
Las Animas County
AQI 2
Lincoln County
AQI 4
Logan County
AQI 1
Mesa County
AQI 16
Mineral County
AQI 4
Moffat County
AQI 7
Montezuma County
AQI 22
Montrose County
AQI 18
Morgan County
AQI 4
Otero County
AQI 3
Ouray County
AQI 21
Park County
AQI 7
Phillips County
AQI 1
Pitkin County
AQI 17
Prowers County
AQI 7
Pueblo County
AQI 13
Rio Blanco County
AQI 9
Rio Grande County
AQI 26
Routt County
AQI 11
Saguache County
AQI 7
San Juan County
AQI 21
San Miguel County
AQI 21
Sedgwick County
AQI 1
Summit County
AQI 7
Teller County
AQI 4
Washington County
AQI 3
Weld County
AQI 22
Yuma County
AQI 3
Data Sources
http://www.airnow.gov/

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