Air quality in Montana
Air quality index (AQI⁺) and PM2.5 air pollution in Montana • 18:10, Aug 02
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?
- Lincoln County225
- Libby189
- Ulm153
- Hill County152
- Cascade County140
- Noxon135
- Cascade134
- Choteau128
- Pablo128
- Darby126
- Judith Basin County122
- Bridger CDP120
- Sedan117
- Churchill115
- Beaverhead County113
- Dillon111
- Great Falls108
- Gallatin County107
- Eureka106
- Bozeman102
- Sweet Grass County102
- Montana City98
- Petroleum County97
- Seeley Lake97
- Lewistown96
- Four Corners94
- St. Ignatius93
- Boulder91
- Butte89
- Missoula County89
- Phillips County89
- Culbertson88
- Livingston88
- Polebridge88
- Marion87
- Park County87
- St. Marie87
- Stevensville87
- Victor87
- East Helena85
- Helena85
- Sula85
- Trout Creek85
- Bonner-West Riverside84
- East Missoula84
- Lolo84
- Orchard Homes84
- Havre North83
- Wye83
- Arlee82
- Philipsburg82
- Thompson Falls82
- Potomac81
- Lewis and Clark County80
- Park City80
- Ravalli80
- Roosevelt County80
- West Glacier80
- Wisdom80
- Anaconda-Deer Lodge County79
- Coram79
- Evergreen79
- Charlo78
- Laurel78
- Martin City78
- Rosebud County78
- West Glendive78
- Big Arm77
- Ronan77
- Somers77
- Townsend77
- Troy77
- White Sulphur Springs77
- Clancy76
- Dayton76
- Frenchtown76
- Helena Valley Northeast76
- Helena Valley Southeast76
- Lockwood76
- Craig75
- Helena Valley Northwest75
- Helena West Side75
- Browning74
- Lincoln74
- South Browning74
- Walkerville74
- Billings73
- East Glacier Park Village73
- Helena Valley West Central73
- Manhattan73
- Three Forks73
- Whitehall73
- Wilsall73
- Alberton72
- Amsterdam72
- Belgrade72
- Geyser72
- Kalispell72
- Malmstrom Air Force Base72
- Roberts72
- Sun Prairie72
- Corvallis71
- Deer Lodge71
- Ennis71
- Hamilton71
- Harlowton71
- Madison County71
- North Browning71
- Ravalli County71
- Stanford71
- Virginia City71
- Missoula70
- Stillwater County70
- Teton County70
- Big Timber69
- Conrad69
- Fort Benton69
- Ryegate69
- Shelby69
- Chinook68
- Rudyard68
- Big Sky67
- Scobey67
- Big Horn County66
- Columbus66
- Crow Agency66
- Hardin66
- Shepherd66
- Superior66
- Birney65
- Chester65
- Colstrip65
- Hysham65
- Lame Deer65
- Pryor65
- Roundup65
- West Yellowstone65
- Forsyth64
- Fort Belknap Agency64
- Wolf Point64
- Circle63
- Dixon63
- Plentywood63
- Absarokee62
- Froid62
- Glasgow62
- Havre62
- Malta62
- Miles City62
- Red Lodge62
- Winnett62
- Broadus61
- Custer County61
- Jordan61
- Richland61
- Terry61
- Toole County61
- Glacier County60
- Glendive60
- Piltzville60
- Cut Bank59
- Ekalaka59
- Sidney59
- Baker58
- Heart Butte58
- Wibaux58
- Clinton55
- Columbia Falls54
- Hot Springs53
- Bear Dance52
- Gardiner50
- Flathead County43
- Whitefish39
- Lakeside38
- Lake County36
- Bigfork31
- Lindisfarne31
- Plains31
- Woods Bay26
- Sanders County25
- Polson22
