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Colorado

United States

2026-09-21 13:00
AQI (US)
Good
Pollutants|Pollens
PM2.5
μg/m³
4.7
PM10
μg/m³
20.4
O3
μg/m³
42.2
NO2
μg/m³
23.5
CO
μg/m³
458.3
SO2
μg/m³
1.4
Weather
  • ℃
  • ℉
1℃
80%
2 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • PM10
  • O3
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 48
Alamosa County
AQI 25
Arapahoe County
AQI 42
Archuleta County
AQI 18
Baca County
AQI 15
Bent County
AQI 14
Boulder County
AQI 21
Broomfield County
AQI 51
Chaffee County
AQI 25
Cheyenne County
AQI 22
Clear Creek County
AQI 21
Conejos County
AQI 25
Costilla County
AQI 13
Crowley County
AQI 10
Custer County
AQI 16
Delta County
AQI 29
Denver County
AQI 40
Dolores County
AQI 14
Douglas County
AQI 40
Eagle County
AQI 32
El Paso County
AQI 34
Elbert County
AQI 27
Fremont County
AQI 13
Garfield County
AQI 12
Gilpin County
AQI 24
Grand County
AQI 26
Gunnison County
AQI 22
Hinsdale County
AQI 21
Huerfano County
AQI 9
Jackson County
AQI 31
Jefferson County
AQI 39
La Plata County
AQI 19
Lake County
AQI 28
Larimer County
AQI 27
Las Animas County
AQI 4
Lincoln County
AQI 12
Logan County
AQI 3
Mesa County
AQI 22
Mineral County
AQI 15
Moffat County
AQI 28
Montezuma County
AQI 31
Montrose County
AQI 29
Morgan County
AQI 13
Otero County
AQI 9
Ouray County
AQI 25
Park County
AQI 27
Phillips County
AQI 4
Pitkin County
AQI 23
Prowers County
AQI 16
Pueblo County
AQI 17
Rio Blanco County
AQI 35
Rio Grande County
AQI 25
Routt County
AQI 23
Saguache County
AQI 20
San Juan County
AQI 25
San Miguel County
AQI 25
Sedgwick County
AQI 4
Summit County
AQI 24
Teller County
AQI 15
Washington County
AQI 8
Weld County
AQI 24
Yuma County
AQI 9
Data Sources
http://www.airnow.gov/

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Cities Nearby

Keystone
AQI 22
Georgetown
AQI 20
Breckenridge
AQI 25
Silverthorne
AQI 24
Frisco
AQI 27
Wildernest
AQI 26
Bailey
AQI 28
Idaho Springs
AQI 25
Copper Mountain
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Black Hawk
AQI 24
Winter Park
AQI 22