1. North America
  2. United States
  3. Colorado

Colorado

United States

2026-09-21 01:00
AQI (China)
Excellent
Pollutants|Pollens
O3
μg/m³
110.8
PM10
μg/m³
11.2
PM2.5
μg/m³
2.6
NO2
μg/m³
5.1
CO
μg/m³
187.5
SO2
μg/m³
1.3
Weather
  • ℃
  • ℉
4℃
66%
6 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • O3
  • PM10
  • PM2.5
  • NO2
  • CO
  • SO2
Places included
Adams County
AQI 36
Alamosa County
AQI 10
Arapahoe County
AQI 37
Archuleta County
AQI 37
Baca County
AQI 8
Bent County
AQI 18
Boulder County
AQI 37
Broomfield County
AQI 12
Chaffee County
AQI 3
Cheyenne County
AQI 2
Clear Creek County
AQI 35
Conejos County
AQI 10
Costilla County
AQI 3
Crowley County
AQI 12
Custer County
AQI 4
Delta County
AQI 11
Denver County
AQI 34
Dolores County
AQI 4
Douglas County
AQI 37
Eagle County
AQI 4
El Paso County
AQI 38
Elbert County
AQI 23
Fremont County
AQI 6
Garfield County
AQI 33
Gilpin County
AQI 38
Grand County
AQI 3
Gunnison County
AQI 34
Hinsdale County
AQI 7
Huerfano County
AQI 6
Jackson County
AQI 3
Jefferson County
AQI 41
La Plata County
AQI 34
Lake County
AQI 3
Larimer County
AQI 36
Las Animas County
AQI 11
Lincoln County
AQI 1
Logan County
AQI 2
Mesa County
AQI 34
Mineral County
AQI 3
Moffat County
AQI 4
Montezuma County
AQI 34
Montrose County
AQI 11
Morgan County
AQI 2
Otero County
AQI 31
Ouray County
AQI 10
Park County
AQI 3
Phillips County
AQI 2
Pitkin County
AQI 29
Prowers County
AQI 15
Pueblo County
AQI 32
Rio Blanco County
AQI 4
Rio Grande County
AQI 10
Routt County
AQI 7
Saguache County
AQI 4
San Juan County
AQI 10
San Miguel County
AQI 10
Sedgwick County
AQI 2
Summit County
AQI 4
Teller County
AQI 4
Washington County
AQI 1
Weld County
AQI 33
Yuma County
AQI 2
Data Sources
http://www.airnow.gov/

Get the App

Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.

iPhone, iPad

Android

Cities Nearby

Keystone
AQI 22
Georgetown
AQI 35
Breckenridge
AQI 4
Silverthorne
AQI 3
Frisco
AQI 3
Wildernest
AQI 3
Bailey
AQI 35
Idaho Springs
AQI 37
Copper Mountain
AQI 3
Black Hawk
AQI 38
Winter Park
AQI 21