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Colorado

United States

2026-09-18 10:00
AQI (US)
Good
Pollutants|Pollens
PM2.5
μg/m³
3.7
O3
μg/m³
31.6
PM10
μg/m³
13.3
NO2
μg/m³
16.9
CO
μg/m³
229.2
SO2
μg/m³
1.3
Weather
  • ℃
  • ℉
5℃
95%
1 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • O3
  • PM10
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 29
Alamosa County
AQI 17
Arapahoe County
AQI 25
Archuleta County
AQI 17
Baca County
AQI 46
Bent County
AQI 51
Boulder County
AQI 14
Broomfield County
AQI 31
Chaffee County
AQI 10
Cheyenne County
AQI 36
Clear Creek County
AQI 16
Conejos County
AQI 17
Costilla County
AQI 12
Crowley County
AQI 29
Custer County
AQI 15
Delta County
AQI 23
Denver County
AQI 24
Dolores County
AQI 4
Douglas County
AQI 24
Eagle County
AQI 22
El Paso County
AQI 26
Elbert County
AQI 48
Fremont County
AQI 10
Garfield County
AQI 2
Gilpin County
AQI 22
Grand County
AQI 14
Gunnison County
AQI 15
Hinsdale County
AQI 7
Huerfano County
AQI 12
Jackson County
AQI 19
Jefferson County
AQI 21
La Plata County
AQI 25
Lake County
AQI 7
Larimer County
AQI 25
Las Animas County
AQI 28
Lincoln County
AQI 31
Logan County
AQI 23
Mesa County
AQI 13
Mineral County
AQI 5
Moffat County
AQI 9
Montezuma County
AQI 19
Montrose County
AQI 23
Morgan County
AQI 51
Otero County
AQI 42
Ouray County
AQI 12
Park County
AQI 15
Phillips County
AQI 23
Pitkin County
AQI 3
Prowers County
AQI 51
Pueblo County
AQI 19
Rio Blanco County
AQI 16
Rio Grande County
AQI 17
Routt County
AQI 12
Saguache County
AQI 14
San Juan County
AQI 12
San Miguel County
AQI 12
Sedgwick County
AQI 23
Summit County
AQI 14
Teller County
AQI 23
Washington County
AQI 31
Weld County
AQI 33
Yuma County
AQI 28
Data Sources
http://www.airnow.gov/

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