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Colorado

United States

2026-09-21 15:00
AQI (China)
Excellent
Pollutants|Pollens
PM10
μg/m³
22.5
O3
μg/m³
65.7
NO2
μg/m³
17.5
PM2.5
μg/m³
5.5
CO
μg/m³
270.8
SO2
μg/m³
1.9
Weather
  • ℃
  • ℉
7℃
53%
9 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • PM10
  • O3
  • NO2
  • PM2.5
  • CO
  • SO2
Places included
Adams County
AQI 33
Alamosa County
AQI 25
Arapahoe County
AQI 33
Archuleta County
AQI 27
Baca County
AQI 2
Bent County
AQI 2
Boulder County
AQI 24
Broomfield County
AQI 33
Chaffee County
AQI 4
Cheyenne County
AQI 3
Clear Creek County
AQI 17
Conejos County
AQI 25
Costilla County
AQI 9
Crowley County
AQI 2
Custer County
AQI 4
Delta County
AQI 17
Denver County
AQI 33
Dolores County
AQI 3
Douglas County
AQI 33
Eagle County
AQI 4
El Paso County
AQI 27
Elbert County
AQI 12
Fremont County
AQI 7
Garfield County
AQI 15
Gilpin County
AQI 25
Grand County
AQI 4
Gunnison County
AQI 17
Hinsdale County
AQI 16
Huerfano County
AQI 3
Jackson County
AQI 4
Jefferson County
AQI 31
La Plata County
AQI 20
Lake County
AQI 4
Larimer County
AQI 21
Las Animas County
AQI 2
Lincoln County
AQI 2
Logan County
AQI 1
Mesa County
AQI 18
Mineral County
AQI 4
Moffat County
AQI 6
Montezuma County
AQI 25
Montrose County
AQI 17
Morgan County
AQI 2
Otero County
AQI 2
Ouray County
AQI 22
Park County
AQI 4
Phillips County
AQI 1
Pitkin County
AQI 21
Prowers County
AQI 7
Pueblo County
AQI 28
Rio Blanco County
AQI 5
Rio Grande County
AQI 25
Routt County
AQI 14
Saguache County
AQI 9
San Juan County
AQI 22
San Miguel County
AQI 22
Sedgwick County
AQI 1
Summit County
AQI 6
Teller County
AQI 7
Washington County
AQI 1
Weld County
AQI 27
Yuma County
AQI 1
Data Sources
http://www.airnow.gov/

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