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Colorado

United States

2026-09-21 18:00
AQI (China)
Excellent
Pollutants|Pollens
O3
μg/m³
95.5
PM10
μg/m³
16.4
PM2.5
μg/m³
4.6
NO2
μg/m³
9.4
CO
μg/m³
208.3
SO2
μg/m³
1.6
Weather
  • ℃
  • ℉
13℃
24%
12 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • O3
  • PM10
  • PM2.5
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 30
Alamosa County
AQI 14
Arapahoe County
AQI 31
Archuleta County
AQI 29
Baca County
AQI 2
Bent County
AQI 1
Boulder County
AQI 31
Broomfield County
AQI 21
Chaffee County
AQI 4
Cheyenne County
AQI 3
Clear Creek County
AQI 26
Conejos County
AQI 14
Costilla County
AQI 5
Crowley County
AQI 1
Custer County
AQI 5
Delta County
AQI 19
Denver County
AQI 29
Dolores County
AQI 3
Douglas County
AQI 29
Eagle County
AQI 4
El Paso County
AQI 30
Elbert County
AQI 17
Fremont County
AQI 11
Garfield County
AQI 25
Gilpin County
AQI 32
Grand County
AQI 4
Gunnison County
AQI 35
Hinsdale County
AQI 11
Huerfano County
AQI 3
Jackson County
AQI 4
Jefferson County
AQI 33
La Plata County
AQI 30
Lake County
AQI 3
Larimer County
AQI 30
Las Animas County
AQI 2
Lincoln County
AQI 2
Logan County
AQI 1
Mesa County
AQI 26
Mineral County
AQI 4
Moffat County
AQI 5
Montezuma County
AQI 32
Montrose County
AQI 19
Morgan County
AQI 2
Otero County
AQI 1
Ouray County
AQI 14
Park County
AQI 4
Phillips County
AQI 1
Pitkin County
AQI 33
Prowers County
AQI 6
Pueblo County
AQI 32
Rio Blanco County
AQI 5
Rio Grande County
AQI 14
Routt County
AQI 12
Saguache County
AQI 6
San Juan County
AQI 14
San Miguel County
AQI 14
Sedgwick County
AQI 1
Summit County
AQI 5
Teller County
AQI 5
Washington County
AQI 1
Weld County
AQI 29
Yuma County
AQI 1
Data Sources
http://www.airnow.gov/

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