Air quality in Montana
Air quality index (AQI⁺) and PM2.5 air pollution in Montana • 21:24, May 31
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?
- Great Falls48
- Lewistown40
- Missoula County33
- Lewis and Clark County31
- Noxon27
- Plains27
- Flathead County26
- Lockwood26
- Troy26
- West Glacier25
- Missoula24
- Trout Creek23
- Libby22
- Thompson Falls22
- Pablo21
- Clinton19
- Frenchtown18
- Lake County18
- Orchard Homes18
- Piltzville18
- Sula18
- Darby17
- Hamilton17
- Ravalli County17
- St. Ignatius17
- Stevensville17
- Victor17
- Plentywood16
- Wisdom15
- Alberton14
- Arlee14
- Corvallis14
- Billings13
- Culbertson13
- Four Corners13
- Havre13
- Park City13
- East Missoula12
- Lolo12
- Philipsburg12
- Anaconda-Deer Lodge County11
- Bear Dance11
- Beaverhead County11
- Bigfork11
- Bonner-West Riverside11
- Boulder11
- Lakeside11
- Lincoln County11
- Livingston11
- Superior11
- Whitefish11
- Wye11
- Absarokee10
- Bridger CDP10
- Hot Springs10
- Lindisfarne10
- Potomac10
- Sanders County10
- Charlo9
- Ekalaka9
- Froid9
- Glacier County9
- Hill County9
- Madison County9
- Marion9
- Park County9
- Ravalli9
- Red Lodge9
- Rosebud County9
- Scobey9
- Stillwater County9
- Teton County9
- Walkerville9
- Woods Bay9
- Baker8
- Big Arm8
- Broadus8
- Chinook8
- Dayton8
- Deer Lodge8
- Dillon8
- Fort Belknap Agency8
- Glasgow8
- Kalispell8
- Malta8
- Polson8
- Ronan8
- Seeley Lake8
- Sidney8
- St. Marie8
- West Yellowstone8
- Wibaux8
- Birney7
- Bozeman7
- Colstrip7
- Columbus7
- Custer County7
- Cut Bank7
- East Helena7
- Ennis7
- Forsyth7
- Glendive7
- Hysham7
- Lame Deer7
- Laurel7
- Miles City7
- Phillips County7
- Richland7
- Rudyard7
- Ryegate7
- Sweet Grass County7
- Terry7
- Virginia City7
- Wolf Point7
- Amsterdam6
- Belgrade6
- Big Timber6
- Browning6
- Circle6
- Clancy6
- Conrad6
- Coram6
- Craig6
- Crow Agency6
- East Glacier Park Village6
- Eureka6
- Evergreen6
- Fort Benton6
- Gallatin County6
- Gardiner6
- Geyser6
- Hardin6
- Harlowton6
- Heart Butte6
- Helena6
- Helena Valley Northeast6
- Helena Valley Northwest6
- Helena Valley Southeast6
- Helena West Side6
- Jordan6
- Judith Basin County6
- Lincoln6
- Malmstrom Air Force Base6
- Manhattan6
- Martin City6
- Montana City6
- North Browning6
- Polebridge6
- Pryor6
- Roberts6
- Roundup6
- Shelby6
- Shepherd6
- Somers6
- South Browning6
- Stanford6
- Sun Prairie6
- Three Forks6
- Toole County6
- Townsend6
- Ulm6
- White Sulphur Springs6
- Whitehall6
- Wilsall6
- Winnett6
- Butte4
- Big Sky2
- Cascade2
- Helena Valley West Central2
- Sedan2
- Columbia Falls1
- Roosevelt County1
- West Glendive1
- Big Horn County0
- Cascade County0
- Chester0
- Choteau0
