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Colorado

United States

2026-05-31 03:00
AQI (China)
Excellent
Pollutants|Pollens
O3
μg/m³
122
PM10
μg/m³
11
NO2
μg/m³
8.2
PM2.5
μg/m³
2.3
CO
μg/m³
250
SO2
μg/m³
1.3
Weather
  • ℃
  • ℉
0℃
84%
14 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • O3
  • PM10
  • NO2
  • PM2.5
  • CO
  • SO2
Places included
Adams County
AQI 43
Alamosa County
AQI 15
Arapahoe County
AQI 43
Archuleta County
AQI 39
Baca County
AQI 8
Bent County
AQI 14
Boulder County
AQI 35
Broomfield County
AQI 17
Chaffee County
AQI 2
Cheyenne County
AQI 9
Clear Creek County
AQI 40
Conejos County
AQI 15
Costilla County
AQI 6
Crowley County
AQI 17
Custer County
AQI 4
Delta County
AQI 8
Denver County
AQI 41
Dolores County
AQI 4
Douglas County
AQI 44
Eagle County
AQI 4
El Paso County
AQI 42
Elbert County
AQI 29
Fremont County
AQI 6
Garfield County
AQI 33
Gilpin County
AQI 39
Grand County
AQI 3
Gunnison County
AQI 39
Hinsdale County
AQI 7
Huerfano County
AQI 3
Jackson County
AQI 2
Jefferson County
AQI 40
La Plata County
AQI 39
Lake County
AQI 3
Larimer County
AQI 35
Las Animas County
AQI 5
Lincoln County
AQI 5
Logan County
AQI 5
Mesa County
AQI 37
Mineral County
AQI 4
Moffat County
AQI 1
Montezuma County
AQI 40
Montrose County
AQI 8
Morgan County
AQI 5
Otero County
AQI 21
Ouray County
AQI 10
Park County
AQI 3
Phillips County
AQI 6
Pitkin County
AQI 36
Prowers County
AQI 9
Pueblo County
AQI 39
Rio Blanco County
AQI 1
Rio Grande County
AQI 15
Routt County
AQI 5
Saguache County
AQI 5
San Juan County
AQI 10
San Miguel County
AQI 10
Sedgwick County
AQI 6
Summit County
AQI 5
Teller County
AQI 3
Washington County
AQI 6
Weld County
AQI 29
Yuma County
AQI 6
Data Sources
http://www.airnow.gov/

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