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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 |  Lakewood | 49 |
| 2 | Gunnison | 44 |
| 3 | Greeley | 43 |
| 4 | Central City | 42 |
| 5 | Towaoc | 42 |
| 6 | Thornton | 39 |
| 7 | Gothic | 38 |
| 8 | Fruitvale | 37 |
| 9 | Dove Creek | 36 |
| 10 | Florence | 33 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
418 Contributors
See all
LIVE AQI CITY RANKING
Real-time Colorado
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Conifer | 5 |
| 2 | San Luis | 11 |
| 3 | Alamosa | 14 |
| 4 | Crested Butte | 14 |
| 5 | Lamar | 15 |
| 6 | Burlington | 16 |
| 7 | Fairplay | 16 |
| 8 | Ponderosa Park | 17 |
| 9 | Collbran | 18 |
| 10 | Commerce City | 18 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Colorado air quality data attribution
418Contributors
- Utah Air Quality
2 stations
- California Air Resources Board (CARB)
2 stations
- Utah Division of Air Quality
2 stations
4 Government Contributors
- Coalition for Clean Air (CCA)
8 stations
Non-profit organization Contributor
- Utah State University (USU)
2 stations
- Anonymous
1 station
2 Educational Contributors
Cheryl Swanson1 station
- B Brenner
1 station
Ken Danti1 station
- Russ Stewart
1 station
- Matt Maccaux
1 station
john1 station
- SxSmith
1 station
Ed K1 station
TyW1 station
Shawn Vezzani1 station
- mckay&zuni
1 station
L1 station
- John Baum
1 station
- Mark Baybutt
1 station
Aaron Bieber1 station
- BeyondAir
1 station
- Dilan Weerasinghe
1 station
- John Salzman
1 station
- kleinp
1 station
wyndham center1 station
20 Individual Contributors
391 Anonymous contributors391 stations
391 Anonymous Contributors
Which is the most polluted city in Colorado?
- Lakewood 49
- Gunnison 44
- Mesa Verde National Park 44
- Greeley 43
- Central City 42
- Towaoc 42
- Thornton 39
- Gothic 38
- Fruitvale 37
- Pueblo West 37
- Dove Creek 36
- Watkins 35
- Florence 33
- Welby 33
- Westcliffe 32
- Windsor 32
- Edgewater 31
- Erie 31
- Redlands 31
- Delta 30
- Granby 30
- Grand Junction 30
- Clifton 29
- Denver 29
- Ouray 29
- U.S. Air Force Academy 29
- Fort Morgan 28
- Leadville 28
- Mesa 28
- Orchard Mesa 28
- Silt 28
- Aurora 27
- Bayfield 27
- Colorado Springs 27
- Cortez 27
- Del Norte 27
- Fruita 27
- Severance 27
- The Pinery 27
- Aspen 26
- Basalt 26
- Fort Lupton 26
- Golden 26
- La Junta 26
- Montrose 26
- Morrison 26
- Pagosa Springs 26
- Palisade 26
- Castle Rock 25
- Durango 25
- Eaton 25
- Fort Collins 25
- Highlands Ranch 25
- Indian Hills 25
- Julesburg 25
- Loveland 25
- Lyons 25
- Meeker 25
- New Castle 25
- Parachute 25
- Pueblo 25
- Aguilar 24
- Aristocrat Ranchettes 24
- Ault 24
- Berthoud 24
- Brighton 24
- Broomfield 24
- Campion 24
- Dacono 24
- Evans 24
- Firestone 24
- Frederick 24
- Gilcrest 24
- Gleneagle 24
- Glenwood Springs 24
- Greenwood Village 24
- Hot Sulphur Springs 24
- Hudson 24
- Johnstown 24
- Ken Caryl 24
- La Salle 24
- Lafayette 24
- Laporte 24
- Livermore 24
- Lochbuie 24
- Mancos 24
- Mead 24
- Milliken 24
- Minturn 24
- Nederland 24
- Paonia 24
- Parker 24
- Platteville 24
- Roxborough Park 24
- Salida 24
- Todd Creek 24
- Woodmoor 24
- Arvada 23
- Black Forest 23
- Boulder 23
- Centennial 23
- Colorado City 23
- Gunbarrel 23
- Hayden 23
- Kersey 23
- Longmont 23
- Louisville 23
- Monument 23
- Twin Lakes 23
- Canon City 22
- Cedaredge 22
- Derby 22
- Englewood 22
- Frisco 22
- Keenesburg 22
- Littleton 22
- Manitou Springs 22
- Niwot 22
- Northglenn 22
- Springfield 22
- Vail 22
- Wellington 22
- Westminster 22
- Avon 21
- Carbondale 21
- Castle Pines 21
- El Jebel 21
- Estes Park 21
- Federal Heights 21
- Gypsum 21
- Routt 21
- Sherrelwood 21
- Silverthorne 21
- Silverton 21
- Walden 21
- Edwards 20
- Evergreen 20
- Florissant 20
- Genesee 20
- Ignacio 20
- Snowmass Village 20
- Steamboat Springs 20
- Superior 20
- Woodland Park 20
- Akron 19
- Bedrock 19
- Berkley 19
- Breckenridge 19
- Brush 19
- Conejos 19
- Eagle 19
- Fraser 19
- Holyoke 19
- Keystone 19
- Kremmling 19
- Loma 19
- Olathe 19
- Orchard City 19
- Shaw Heights 19
- Sterling 19
- Wray 19
- Acres Green 18
- Air Force Academy 18
- Alamosa East 18
- Applewood 18
- Battlement Mesa 18
- Bennett 18
- Buena Vista 18
- Byers 18
- Carriage Club 18
- Cascade-Chipita Park 18
- Castle Pines North 18
- Castlewood 18
- Center 18
- Cherry Creek 18
- Cherry Hills Village 18
- Cimarron Hills 18
- Coal Creek 18
- Collbran 18
- Columbine 18
- Columbine Valley 18
- Commerce City 18
- Creede 18
- Cripple Creek 18
- Dove Valley 18
- Elizabeth 18
- Ellicott 18
- Fort Carson 18
- Fountain 18
- Fowler 18
- Georgetown 18
- Glen Eden 18
- Glendale 18
- Holly Hills 18
- Hugo 18
- Idaho Springs 18
- Inverness 18
- Kiowa 18
- Kittredge 18
- Lake City 18
- Leadville North 18
- Limon 18
- Lincoln Park 18
- Lone Tree 18
- Meridian 18
- Monte Vista 18
- Mountain Village 18
- Palmer Lake 18
- Park 18
- Penrose 18
- Perry Park 18
- Rangely 18
- Rifle 18
- Saguache 18
- Security-Widefield 18
- Sheridan 18
- Southglenn 18
- Stonegate 18
- Strasburg 18
- Stratmoor 18
- Telluride 18
- Trinidad 18
- Upper Bear Creek 18
- Walsenburg 18
- West Pleasant View 18
- Wheat Ridge 18
- Yuma 18
- Cheyenne Wells 17
- Craig 17
- Eads 17
- Las Animas 17
- Ordway 17
- Ponderosa Park 17
- Rocky Ford 17
- Burlington 16
- Fairplay 16
- Lamar 15
- Alamosa 14
- Crested Butte 14
- San Luis 11
- Conifer 5
AQI US, Metric