Toggle navigation
Places
AQI (US)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
English
Français
Deutsch
日本語
한국어
简体中文
繁體中文
North America
United States
Colorado
AQI (US)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
Colorado
United States
2026-09-18 02:00
AQI (US)
Good
Pollutants
|
Pollens
O3
μg/m³
55.3
PM2.5
μg/m³
4
PM10
μg/m³
17.8
NO2
μg/m³
16.2
CO
μg/m³
354.2
SO2
μg/m³
1.3
Pollen
5.8
Weather
℃
℃
℉
7℃
97%
3 kph
0 of 11
Historical Data
Hourly
Hourly
Daily
AQI (US)
AQI (US)
Pollen
O3
PM2.5
PM10
NO2
CO
SO2
Places included
Adams County
AQI 30
Alamosa County
AQI 16
Arapahoe County
AQI 29
Archuleta County
AQI 22
Baca County
AQI 50
Bent County
AQI 57
Boulder County
AQI 21
Broomfield County
AQI 22
Chaffee County
AQI 8
Cheyenne County
AQI 44
Clear Creek County
AQI 26
Conejos County
AQI 23
Costilla County
AQI 22
Crowley County
AQI 56
Custer County
AQI 17
Delta County
AQI 16
Denver County
AQI 23
Dolores County
AQI 11
Douglas County
AQI 25
Eagle County
AQI 15
El Paso County
AQI 38
Elbert County
AQI 27
Fremont County
AQI 33
Garfield County
AQI 18
Gilpin County
AQI 20
Grand County
AQI 8
Gunnison County
AQI 20
Hinsdale County
AQI 14
Huerfano County
AQI 23
Jackson County
AQI 16
Jefferson County
AQI 27
La Plata County
AQI 23
Lake County
AQI 7
Larimer County
AQI 26
Las Animas County
AQI 48
Lincoln County
AQI 41
Logan County
AQI 30
Mesa County
AQI 25
Mineral County
AQI 21
Moffat County
AQI 8
Montezuma County
AQI 26
Montrose County
AQI 16
Morgan County
AQI 23
Otero County
AQI 60
Ouray County
AQI 23
Park County
AQI 9
Phillips County
AQI 39
Pitkin County
AQI 7
Prowers County
AQI 55
Pueblo County
AQI 31
Rio Blanco County
AQI 11
Rio Grande County
AQI 23
Routt County
AQI 16
Saguache County
AQI 19
San Juan County
AQI 23
San Miguel County
AQI 22
Sedgwick County
AQI 42
Summit County
AQI 8
Teller County
AQI 23
Washington County
AQI 24
Weld County
AQI 33
Yuma County
AQI 39
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
Scan QR Code to Download App
iOS
Google Play
Download APK
Cities Nearby
Keystone
AQI 17
Georgetown
AQI 27
Breckenridge
AQI 8
Silverthorne
AQI 7
Frisco
AQI 7
Wildernest
AQI 7
Bailey
AQI 22
Idaho Springs
AQI 24
Copper Mountain
AQI 7
Black Hawk
AQI 20
Winter Park
AQI 17
Air Matters © 2026