Air quality in Colorado
Air quality index (AQI⁺) and PM2.5 air pollution in Colorado • 05:30, Oct 08
Colorado Department of Public Health & Environment (CDPHE)wyndham centerRuss StewartMatt MaccauxAaron BieberCoalition for Clean Air (CCA)S ForestLTom FullerGeorgeLynchUSA National Park ServicejohnCalifornia Air Resources Board (CARB)mckay&zuniSharksWithLazersE StationJSouthern Ute TribeUtah State University (USU)John SalzmanT HagemanSxSmithSteamboatRed Pony FarmairLu VenclBeyondAirRabbit Mountain Equestrian CenterTyWShawn VezzaniphshrcoKennen WarmackJNByron BoyKen DantiJohn Baumamorris101Cheryl SwansonHaley Kline MurphyJCQHEPA Office of Atmospheric ProtectionRodeoB BrennerMemorial Regional HealthJohn MannerEmily StonehamAnonymousKatie GirondaKay LewisEd KKitDDenAnonymous contributor
Colorado Department of Public Health & Environment (CDPHE)wyndham centerRuss StewartMatt MaccauxAaron BieberCoalition for Clean Air (CCA)S ForestLTom FullerGeorgeLynchUSA National Park ServicejohnCalifornia Air Resources Board (CARB)mckay&zuniSharksWithLazersE StationJSouthern Ute TribeUtah State University (USU)John SalzmanT HagemanSxSmithSteamboatRed Pony FarmairLu VenclBeyondAirRabbit Mountain Equestrian CenterTyWShawn VezzaniphshrcoKennen WarmackJNByron BoyKen DantiJohn Baumamorris101Cheryl SwansonHaley Kline MurphyJCQHEPA Office of Atmospheric ProtectionRodeoB BrennerMemorial Regional HealthJohn MannerEmily StonehamAnonymousKatie GirondaKay LewisEd KKitDDenAnonymous contributor
Live most polluted city ranking
Real-time Colorado most polluted city ranking
Wildfires in Colorado
Real-time information
Active fire
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Learn more about global air quality
Which is the most polluted city in Colorado?
- Dolores County66
- Fort Collins65
- Commerce City64
- Greeley58
- Loveland58
- Manitou Springs55
- Frederick53
- Platteville53
- Jefferson49
- Timnath49
- Boulder48
- Evergreen47
- Pueblo West47
- Douglas46
- La Plata County46
- Weld46
- Black Hawk45
- Grand County45
- Larimer45
- Sugar City45
- Gunnison County44
- Lyons44
- Centennial43
- Fort Lupton43
- Logan County43
- Northglenn43
- Denver42
- Colorado City41
- Dakota Ridge41
- Montezuma County41
- Prowers41
- Four Square Mile40
- Sheridan40
- Cherry Creek39
- Florence39
- Kit Carson County39
- Twin Lakes, Adams County39
- Archuleta38
- Berthoud38
- Genesee38
- Mesa38
- Ouray38
- Thornton38
- Cortez37
- Estes Park town37
- Fowler37
- Highlands Ranch37
- La Junta37
- Lafayette37
- Shaw Heights37
- Swink37
- Trail Side37
- Castle Rock36
- El Paso36
- Idaho Springs36
- Lazy Acres36
- Niwot36
- Olney Springs36
- Otero County36
- Parker36
- Pueblo County36
- Sterling Ranch36
- Westminster36
- Center35
- Eldorado Springs35
- Federal Heights35
- Golden35
- Lakewood35
- Rifle35
- Applewood34
- Bennett34
- Black Forest34
- Inverness34
- Lamar34
- Longmont34
- Moffat County34
- Palmer Lake34
- Superior34
- Upper Bear Creek34
- Windsor34
- Arapahoe County33
- Aurora33
- Castle Pines Village33
- Granby33
- Gunbarrel33
- Lake33
- Laporte33
- Leadville33
- Mountain View33
- Palisade33
- Paragon Estates33
- Wellington33
- Aguilar32
- Edgewater32
- Estes Park32
- Nathrop32
- Park County32
- Brighton31
- Buena Vista31
- Burlington31
- Costilla County31
- Craig31
- Elbert County31
- Littleton31
- Red Feather Lakes31
- Redlands31
- Routt County31
- Salida31
- Trinidad31
- Ward31
- Westcliffe31
- Castle Pines30
- Crowley30
- Glenwood Springs30
- Julesburg30
- Lake City30
- Avon29
- Broomfield29
- Cañon City29
- Cedaredge29
- Chaffee County29
- Durango29
- Edwards29
- Englewood29
- Grand Junction29
- Hugo29
- Ignacio29
- Orchard Mesa29
- Poncha Springs29
- Pueblo29
- Saguache29
- Steamboat Springs29
- Towaoc29
- Vail29
- Arvada28
- Basalt28
- Eagle County28
- El Jebel28
- Garfield County28
- Greenwood Village28
- Louisville28
- Montrose28
- Pitkin County28
- Snowmass Village28
- Aspen27
- Bayfield27
- Copper Mountain27
- Erie27
- Fruita27
- Fruitvale27
- Hot Sulphur Springs27
- Mancos27
- Manzanola27
- Oak Creek27
- Teller27
- Walsh27
- Wheat Ridge27
- Breckenridge26
- Colorado Springs26
- Delta County26
- Dolores26
- Keystone26
- Summit26
- Welby26
- Winter Park26
- Baca County25
- Cascade-Chipita Park25
- Conejos25
- Gunnison25
- Sherrelwood25
- Silverthorne25
- Boulder County24
- Green Mountain Falls23
- Derby22
- Pagosa Springs22
- Paonia22
- Roxborough Park22
- Acres Green21
- Air Force Academy21
- Alamosa21
- Aristocrat Ranchettes21
- Ault21
- Byers21
- Cherry Hills Village21
- Cimarron Hills21
- Dacono21
- Delta21
- Dove Valley21
- Eaton21
- Ellicott21
- Evans21
- Firestone21
- Fort Carson21
- Fort Morgan21
- Fountain21
- Gilcrest21
- Gleneagle21
- Grover21
- Hudson21
- Keenesburg21
- Kersey21
- Kiowa21
- La Salle21
- Lochbuie21
- Lone Tree21
- Louviers21
- Mead21
- Meridian21
- Meridian Village21
- Milliken21
- Monument21
- Perry Park21
- Ponderosa Park21
- Security-Widefield21
- Sedalia21
- Severance21
- Stonegate21
- Strasburg21
- The Pinery21
- Todd Creek21
- Watkins21
- Woodmoor21
- Berkley20
- Brush20
- Columbine20
- Columbine Valley20
- Altona19
- Brookside19
- Cripple Creek19
- Fairmount19
- Florissant19
- Indian Hills19
- Kittredge19
- Lincoln Park19
- Penrose19
- Silverton19
- Telluride19
- Valmont19
- Beulah Valley18
- Central17
- Loma17
- Nederland17
- Rangely17
- Rio Blanco17
- Tabernash17
- Walden17
- Clear Creek County16
- Clifton16
- Fraser16
- Georgetown16
- Silt16
- Battlement Mesa15
- Cattle Creek15
- Collbran15
- Dillon15
- Eagle15
- Fairplay15
- Frisco15
- Gypsum15
- Hayden15
- Kremmling15
- Leadville North15
- Mineral15
- Minturn15
- New Castle15
- Orchard City15
- Parachute15
- Wolcott15
- Custer County13
- Ken Caryl9
- Mount Crested Butte9
- Olathe9
- Sterling9
- Crook8
- Crested Butte7
- Holyoke7
- Akron6
- Alamosa County6
- Alamosa East6
- Bethune6
- Carbondale6
- Cheraw6
- Cheyenne Wells6
- Crestone6
- Del Norte6
- Dove Creek6
- Eads6
- Garfield6
- Las Animas6
- Limon6
- Monte Vista6
- Montrose County6
- Mountain Village6
- Ordway6
- Ouray County6
- Rocky Ford6
- Saguache County6
- San Luis6
- San Miguel County6
- Springfield6
- Walsenburg6
- Wiley6
- Wray6
- Yuma6
- Glendale, Arapahoe County3
- Lakeside2
- Aspen Park1
- Coal Creek, Jefferson County1
- Stratmoor1
- West Pleasant View1
- Aetna Estates0
- Alma0
- Holly Hills0
- Maysville0
- Woodland Park0
