Air quality in Montana
Air quality index (AQI⁺) and PM2.5 air pollution in Montana • 13:29, Jun 11
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?
- Phillips County49
- St. Ignatius47
- Great Falls44
- Thompson Falls31
- Lewis and Clark County28
- Missoula County28
- East Helena24
- Boulder23
- Darby23
- Lewistown23
- Lockwood23
- Plains21
- Churchill20
- Culbertson20
- Dillon20
- Four Corners20
- Pablo20
- Park City20
- Absarokee19
- Bear Dance19
- Cut Bank19
- Lake County19
- Libby19
- Missoula19
- Stillwater County19
- Whitefish19
- Corvallis18
- Gallatin County18
- Hamilton18
- Helena18
- Arlee17
- Helena Valley West Central17
- Lincoln County17
- Roosevelt County17
- Bozeman16
- Choteau16
- Clinton16
- Deer Lodge16
- Glacier County16
- Heart Butte16
- Orchard Homes16
- Piltzville16
- Ravalli County16
- Roberts16
- Teton County16
- Troy16
- Flathead County15
- Frenchtown15
- Livingston15
- Park County15
- West Glacier15
- Butte14
- Havre14
- Lindisfarne14
- Lolo14
- Madison County14
- Ronan14
- Seeley Lake14
- Superior14
- Sweet Grass County14
- Big Sky13
- Columbia Falls13
- Hot Springs13
- Kalispell13
- Beaverhead County12
- Charlo12
- Dixon12
- North Browning12
- Noxon12
- Ravalli12
- St. Marie12
- Ulm12
- West Glendive12
- Wye12
- Big Arm11
- Bonner-West Riverside11
- Dayton11
- East Missoula11
- Lakeside11
- Philipsburg11
- Plentywood11
- Polson11
- Potomac11
- Red Lodge11
- Scobey11
- Stevensville11
- Victor11
- Anaconda-Deer Lodge County10
- Bigfork10
- Evergreen10
- Froid10
- Marion10
- Somers10
- Sula10
- Bridger CDP9
- Judith Basin County9
- Sanders County9
- Sidney9
- Toole County9
- Big Timber8
- Columbus8
- Gardiner8
- Richland8
- Sedan8
- West Yellowstone8
- Wolf Point8
- Baker7
- Circle7
- Clancy7
- Conrad7
- Craig7
- Ekalaka7
- Glasgow7
- Glendive7
- Helena Valley Northeast7
- Helena Valley Northwest7
- Helena Valley Southeast7
- Helena West Side7
- Lincoln7
- Malta7
- Montana City7
- Sun Prairie7
- Walkerville7
- Wibaux7
- Wisdom7
- Woods Bay7
- Amsterdam6
- Belgrade6
- Big Horn County6
- Birney6
- Broadus6
- Browning6
- Cascade County6
- Chinook6
- Colstrip6
- Coram6
- Crow Agency6
- Custer County6
- East Glacier Park Village6
- Ennis6
- Eureka6
- Forsyth6
- Fort Belknap Agency6
- Fort Benton6
- Geyser6
- Hardin6
- Harlowton6
- Hill County6
- Hysham6
- Jordan6
- Lame Deer6
- Laurel6
- Malmstrom Air Force Base6
- Manhattan6
- Martin City6
- Miles City6
- Polebridge6
- Pryor6
- Roundup6
- Rudyard6
- Ryegate6
- Shepherd6
- South Browning6
- Stanford6
- Terry6
- Three Forks6
- Townsend6
- Virginia City6
- White Sulphur Springs6
- Whitehall6
- Wilsall6
- Winnett6
- Trout Creek4
- Alberton3
- Billings3
- Shelby3
- Chester1
- Rosebud County1
