Air quality in Colorado
Air quality index (AQI) and PM2.5 air pollution in Colorado
LIVE AQI CITY RANKING
Real-time Colorado
Most polluted city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Westminster | 108 |
| 2 | Thornton | 101 |
| 3 | Louisville | 100 |
| 4 | Roxborough Park | 98 |
| 5 | Broomfield | 94 |
| 6 | Denver | 94 |
| 7 | Superior | 93 |
| 8 | Fort Lupton | 91 |
| 9 | Lakewood | 90 |
| 10 | Highlands Ranch | 87 |
(local time)
SEE WORLD AQI RANKINGAir Quality contributors Sources
Data provided by
Contributors
8
Data sources
5
See all
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Become a contributorLIVE AQI CITY RANKING
Real-time Colorado
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Dove Creek | 0 |
| 2 | Gothic | 1 |
| 3 | Silverton | 1 |
| 4 | Battlement Mesa | 2 |
| 5 | Parachute | 2 |
| 6 | Commerce City | 3 |
| 7 | Fruita | 3 |
| 8 | Estes Park | 4 |
| 9 | Ignacio | 4 |
| 10 | Rifle | 4 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
How to best protect from air pollution?
Colorado air quality data sources
Contributors 8
- Air Pollution Control District
3 stations
- California Air Resources Board (CARB)
2 stations
Government
- Coalition for Clean Air (CCA)
10 stations
Non-profit organization
Utah State University (USU)1 station
Educational
- Environmental Protection Agency
25 stations
- AirVisual
29 stations
- 193 Anonymous contributor
193 stations
- Claim my PurpleAir
Anonymous
Which is the most polluted city in Colorado?
- Westminster108
- Thornton101
- Louisville100
- Roxborough Park98
- Broomfield94
- Denver94
- Superior93
- Fort Lupton91
- Lakewood90
- Highlands Ranch87
- Gunbarrel84
- Del Norte81
- Niwot78
- Longmont77
- Milliken74
- Boulder72
- Hot Sulphur Springs71
- Erie70
- Golden70
- Ouray68
- Edgewater67
- Manitou Springs64
- Johnstown64
- Aurora64
- Windsor63
- Loveland61
- Air Force Academy61
- Evergreen61
- Avon60
- Breckenridge59
- Fort Carson59
- Fort Collins58
- Dove Valley56
- Pueblo55
- Paonia55
- Kittredge53
- Castle Rock52
- Colorado Springs52
- Ken Caryl51
- Black Forest51
- Montrose51
- Ponderosa Park49
- The Pinery48
- Indian Hills46
- Applewood46
- Southglenn46
- Holly Hills46
- Conifer46
- Greenwood Village46
- Canon City46
- Perry Park46
- West Pleasant View46
- Glendale46
- Wheat Ridge46
- Englewood46
- Genesee46
- Central City46
- Columbine Valley46
- Cherry Hills Village46
- Sheridan46
- Columbine46
- Coal Creek46
- Vail44
- Cortez43
- Todd Creek42
- Idaho Springs42
- Shaw Heights42
- Berkley42
- Nederland42
- Northglenn42
- Federal Heights42
- Sherrelwood42
- Upper Bear Creek42
- Twin Lakes42
- Arvada42
- Derby42
- Basalt41
- U.S. Air Force Academy41
- Frederick38
- Lafayette38
- Cascade-Chipita Park38
- Palmer Lake38
- Mead38
- Campion38
- Firestone38
- Berthoud38
- Dacono38
- Palisade31
- Alamosa29
- Florissant29
- Cripple Creek29
- Castlewood29
- Acres Green29
- Fountain29
- Carriage Club29
- Stonegate29
- Cherry Creek29
- Welby29
- Castle Pines29
- Castle Pines North29
- Meridian29
- Lone Tree29
- Littleton29
- Parker29
- Inverness29
- Security-Widefield29
- Stratmoor29
- Leadville28
- Aristocrat Ranchettes25
- Ault25
- Woodmoor25
- La Salle25
- Granby25
- Gleneagle25
- Severance25
- Brighton25
- Eaton25
- Centennial25
- Platteville25
- Gilcrest25
- Lochbuie25
- Cimarron Hills25
- Georgetown25
- Morrison25
- Monument25
- Minturn25
- Evans25
- Fraser25
- Clifton23
- Durango22
- Leadville North21
- Kremmling21
- Laporte21
- San Luis21
- Fruitvale18
- Walsenburg18
- Greeley17
- Alamosa East17
- Buena Vista17
- Olathe17
- New Castle16
- Pagosa Springs16
- Orchard Mesa16
- Grand Junction15
- Snowmass Village15
- Lyons14
- Mancos13
- Orchard City13
- Wellington13
- Aspen12
- Silt11
- Eagle11
- Woodland Park11
- Walden11
- Creede10
- Trinidad9
- Towaoc9
- Springfield9
- Carbondale9
- Fairplay9
- Monte Vista9
- El Jebel9
- Mesa Verde National Park9
- Hayden9
- Lamar9
- Mountain Village9
- Loma9
- Salida8
- Delta8
- Bayfield7
- Cedaredge7
- Frisco7
- Silverthorne6
- Keystone6
- Edwards6
- Conejos6
- Keenesburg5
- Center5
- Kersey5
- Wray5
- Penrose5
- Kiowa5
- Meeker5
- Yuma5
- Bennett5
- Pueblo West5
- Rangely5
- Redlands5
- La Junta5
- Gypsum5
- Florence5
- Saguache5
- Lake City5
- Craig5
- Elizabeth5
- Holyoke5
- Las Animas5
- Glen Eden5
- Ellicott5
- Hugo5
- Lincoln Park5
- Cheyenne Wells5
- Glenwood Springs5
- Watkins5
- Crested Butte5
- Steamboat Springs5
- Sterling5
- Burlington5
- Strasburg5
- Eads5
- Hudson5
- Rifle4
- Estes Park4
- Telluride4
- Ignacio4
- Commerce City3
- Fruita3
- Battlement Mesa2
- Parachute2
- Silverton1
- Gothic1
- Colorado City0
- Gunnison0
- Fort Morgan0
- Limon0
- Dove Creek0
- Ordway0
- Westcliffe0
- Julesburg0
- Byers0
- Brush0
- Bedrock0
- Rocky Ford0
- Akron0
- Fowler0
