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Colorado

United States

2026-05-31 17:00
AQI (China)
Excellent
Pollutants|Pollens
O3
μg/m³
121.2
PM10
μg/m³
8.6
PM2.5
μg/m³
2.3
NO2
μg/m³
3.6
CO
μg/m³
125
SO2
μg/m³
1.4
Weather
  • ℃
  • ℉
11℃
26%
23 kph
10 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • O3
  • PM10
  • PM2.5
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 40
Alamosa County
AQI 9
Arapahoe County
AQI 43
Archuleta County
AQI 40
Baca County
AQI 10
Bent County
AQI 13
Boulder County
AQI 37
Broomfield County
AQI 8
Chaffee County
AQI 14
Cheyenne County
AQI 12
Clear Creek County
AQI 37
Conejos County
AQI 9
Costilla County
AQI 13
Crowley County
AQI 15
Custer County
AQI 14
Delta County
AQI 11
Denver County
AQI 40
Dolores County
AQI 13
Douglas County
AQI 42
Eagle County
AQI 9
El Paso County
AQI 40
Elbert County
AQI 27
Fremont County
AQI 9
Garfield County
AQI 31
Gilpin County
AQI 37
Grand County
AQI 7
Gunnison County
AQI 39
Hinsdale County
AQI 12
Huerfano County
AQI 14
Jackson County
AQI 7
Jefferson County
AQI 40
La Plata County
AQI 39
Lake County
AQI 13
Larimer County
AQI 36
Las Animas County
AQI 14
Lincoln County
AQI 20
Logan County
AQI 9
Mesa County
AQI 31
Mineral County
AQI 12
Moffat County
AQI 8
Montezuma County
AQI 40
Montrose County
AQI 11
Morgan County
AQI 14
Otero County
AQI 15
Ouray County
AQI 10
Park County
AQI 13
Phillips County
AQI 7
Pitkin County
AQI 36
Prowers County
AQI 16
Pueblo County
AQI 39
Rio Blanco County
AQI 9
Rio Grande County
AQI 9
Routt County
AQI 7
Saguache County
AQI 14
San Juan County
AQI 10
San Miguel County
AQI 10
Sedgwick County
AQI 7
Summit County
AQI 10
Teller County
AQI 4
Washington County
AQI 13
Weld County
AQI 38
Yuma County
AQI 8
Data Sources
http://www.airnow.gov/

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