Air quality in Montana
Air quality index (AQI⁺) and PM2.5 air pollution in Montana • 09:30, May 21
Live most polluted city ranking
Real-time Montana most polluted city ranking
Learn more about global air quality
Which is the most polluted city in Montana?
- Plains44
- Lakeside40
- Judith Basin County38
- Lewis and Clark County31
- Phillips County29
- Missoula27
- Four Corners26
- Alberton25
- Lockwood25
- Big Sky24
- Dixon24
- Lewistown24
- Chester22
- Boulder21
- Cascade County20
- Whitefish19
- Butte18
- Clinton18
- East Helena18
- St. Ignatius18
- Helena17
- Helena Valley West Central17
- Corvallis16
- Hill County16
- Glacier County15
- Culbertson14
- Bear Dance13
- Conrad13
- Heart Butte13
- Noxon13
- Rudyard13
- Teton County13
- Bigfork12
- Cascade12
- Choteau12
- Fort Benton12
- Lincoln County12
- Pablo12
- Great Falls11
- Piltzville11
- South Browning11
- Sun Prairie11
- Ulm11
- Browning10
- Shelby10
- Arlee9
- Bridger CDP9
- Coram9
- Eureka9
- Evergreen9
- Lake County9
- Malmstrom Air Force Base9
- Marion9
- Martin City9
- Seeley Lake9
- Somers9
- Baker8
- Broadus8
- Chinook8
- Craig8
- East Glacier Park Village8
- Ekalaka8
- Geyser8
- Lincoln8
- Plentywood8
- Polebridge8
- Ronan8
- Sidney8
- Stanford8
- Havre7
- Helena Valley Northeast7
- Helena Valley Northwest7
- Helena Valley Southeast7
- Helena West Side7
- Kalispell7
- Libby7
- North Browning7
- Ravalli County7
- Sweet Grass County7
- Woods Bay7
- Wye7
- Amsterdam6
- Anaconda-Deer Lodge County6
- Beaverhead County6
- Belgrade6
- Big Arm6
- Big Timber6
- Billings6
- Birney6
- Bonner-West Riverside6
- Charlo6
- Circle6
- Clancy6
- Colstrip6
- Columbus6
- Crow Agency6
- Cut Bank6
- Dayton6
- Deer Lodge6
- East Missoula6
- Ennis6
- Flathead County6
- Forsyth6
- Fort Belknap Agency6
- Froid6
- Glasgow6
- Glendive6
- Hardin6
- Harlowton6
- Hot Springs6
- Hysham6
- Jordan6
- Lame Deer6
- Laurel6
- Lindisfarne6
- Malta6
- Manhattan6
- Miles City6
- Montana City6
- Philipsburg6
- Potomac6
- Pryor6
- Ravalli6
- Richland6
- Roberts6
- Roundup6
- Ryegate6
- Scobey6
- Shepherd6
- Stevensville6
- Sula6
- Superior6
- Terry6
- Thompson Falls6
- Three Forks6
- Townsend6
- Victor6
- Virginia City6
- Walkerville6
- West Yellowstone6
- White Sulphur Springs6
- Whitehall6
- Wibaux6
- Wilsall6
- Winnett6
- Wisdom6
- Wolf Point6
- Madison County5
- Bozeman4
- Custer County4
- Dillon4
- Orchard Homes4
- Park County4
- Roosevelt County4
- Absarokee3
- Columbia Falls3
- Gallatin County3
- Hamilton3
- Livingston3
- West Glacier3
- West Glendive3
- Darby2
- Frenchtown2
- Gardiner2
- Red Lodge2
- Rosebud County2
- St. Marie2
- Toole County2
- Trout Creek2
- Churchill1
- Lolo1
- Missoula County1
- Troy1
- Sedan0
- Stillwater County0
