Air quality in Montana
Air quality index (AQI⁺) and PM2.5 air pollution in Montana • 14:55, 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?
- Lewistown37
- Libby36
- Lewis and Clark County35
- Missoula34
- Teton County32
- Great Falls31
- Boulder30
- Frenchtown30
- Thompson Falls29
- Glacier County28
- Kalispell28
- Shelby28
- Lockwood27
- Seeley Lake27
- Wye25
- Butte24
- Cut Bank24
- Plains24
- Helena Valley West Central23
- Arlee22
- Chester22
- East Helena22
- Eureka22
- Flathead County22
- Lolo22
- Orchard Homes22
- Phillips County22
- St. Ignatius22
- Cascade21
- Columbia Falls21
- Helena21
- Lakeside21
- Piltzville21
- Alberton20
- Choteau20
- Darby20
- Heart Butte20
- Hill County20
- Judith Basin County20
- Noxon20
- Troy20
- Whitefish20
- Cascade County19
- Deer Lodge19
- Lincoln County19
- West Glendive19
- Clinton18
- Dixon18
- Woods Bay18
- Churchill17
- Culbertson17
- Four Corners17
- Hamilton17
- Lake County17
- Lindisfarne17
- North Browning17
- Ravalli County17
- Ronan17
- Sedan17
- Sidney17
- Ulm17
- Birney16
- Bonner-West Riverside16
- Bridger CDP16
- Colstrip16
- Conrad16
- East Missoula16
- Fort Benton16
- Hot Springs16
- Lame Deer16
- Malmstrom Air Force Base16
- Marion16
- Missoula County16
- Plentywood16
- Polebridge16
- Ravalli16
- Rudyard16
- Stevensville16
- Sun Prairie16
- Superior16
- Victor16
- Charlo15
- Coram15
- Froid15
- Martin City15
- West Glacier15
- Bear Dance14
- Havre14
- Roosevelt County14
- Sweet Grass County14
- Corvallis13
- Evergreen13
- Livingston13
- Richland13
- Wisdom13
- Baker12
- Big Arm12
- Billings12
- Broadus12
- Browning12
- Chinook12
- Crow Agency12
- Dayton12
- East Glacier Park Village12
- Ekalaka12
- Fort Belknap Agency12
- Gallatin County12
- Geyser12
- Glendive12
- Harlowton12
- Madison County12
- Pablo12
- Potomac12
- Scobey12
- Somers12
- South Browning12
- St. Marie12
- Stanford12
- Sula12
- Trout Creek12
- Wibaux12
- Amsterdam11
- Anaconda-Deer Lodge County11
- Belgrade11
- Clancy11
- Craig11
- Ennis11
- Helena Valley Northeast11
- Helena Valley Northwest11
- Helena Valley Southeast11
- Helena West Side11
- Lincoln11
- Malta11
- Manhattan11
- Montana City11
- Park County11
- Philipsburg11
- Ryegate11
- Stillwater County11
- Three Forks11
- Townsend11
- Virginia City11
- Walkerville11
- White Sulphur Springs11
- Whitehall11
- Wilsall11
- Absarokee10
- Beaverhead County10
- Bozeman10
- Circle9
- Forsyth9
- Hardin9
- Hysham9
- Miles City9
- Pryor9
- Roundup9
- Shepherd9
- Terry9
- Winnett9
- Dillon8
- Glasgow8
- Laurel8
- Wolf Point8
- Big Sky7
- Big Timber7
- Bigfork7
- Columbus6
- Gardiner6
- Jordan6
- West Yellowstone6
- Toole County2
- Custer County1
- Red Lodge1
- Rosebud County1
- Roberts0
