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  3. Colorado

Colorado

United States

2026-09-20 18:00
AQI (US)
Good
Pollutants|Pollens
O3
μg/m³
97.6
PM2.5
μg/m³
3.1
PM10
μg/m³
11.8
NO2
μg/m³
7
CO
μg/m³
208.3
SO2
μg/m³
1.9
Weather
  • ℃
  • ℉
12℃
24%
21 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • O3
  • PM2.5
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 43
Alamosa County
AQI 13
Arapahoe County
AQI 41
Archuleta County
AQI 38
Baca County
AQI 6
Bent County
AQI 6
Boulder County
AQI 43
Broomfield County
AQI 31
Chaffee County
AQI 10
Cheyenne County
AQI 3
Clear Creek County
AQI 38
Conejos County
AQI 13
Costilla County
AQI 6
Crowley County
AQI 9
Custer County
AQI 7
Delta County
AQI 15
Denver County
AQI 38
Dolores County
AQI 10
Douglas County
AQI 42
Eagle County
AQI 10
El Paso County
AQI 47
Elbert County
AQI 23
Fremont County
AQI 13
Garfield County
AQI 39
Gilpin County
AQI 43
Grand County
AQI 8
Gunnison County
AQI 47
Hinsdale County
AQI 10
Huerfano County
AQI 6
Jackson County
AQI 9
Jefferson County
AQI 47
La Plata County
AQI 44
Lake County
AQI 9
Larimer County
AQI 46
Las Animas County
AQI 7
Lincoln County
AQI 7
Logan County
AQI 4
Mesa County
AQI 46
Mineral County
AQI 8
Moffat County
AQI 12
Montezuma County
AQI 42
Montrose County
AQI 15
Morgan County
AQI 8
Otero County
AQI 8
Ouray County
AQI 12
Park County
AQI 9
Phillips County
AQI 5
Pitkin County
AQI 37
Prowers County
AQI 16
Pueblo County
AQI 42
Rio Blanco County
AQI 12
Rio Grande County
AQI 13
Routt County
AQI 23
Saguache County
AQI 8
San Juan County
AQI 12
San Miguel County
AQI 12
Sedgwick County
AQI 4
Summit County
AQI 9
Teller County
AQI 14
Washington County
AQI 5
Weld County
AQI 42
Yuma County
AQI 5
Data Sources
http://www.airnow.gov/

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AQI 39
Breckenridge
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Silverthorne
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Wildernest
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Bailey
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Winter Park
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