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Air quality in Montana
Air quality index (AQI) and PM2.5 air pollution in Montana
LIVE AQI CITY RANKING
Real-time Montana
Most polluted city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Thompson Falls | 38 |
| 2 | Great Falls | 37 |
| 3 | Kalispell | 35 |
| 4 | East Helena | 30 |
| 5 | Lewistown | 26 |
| 6 | West Glacier | 26 |
| 7 | Frenchtown | 25 |
| 8 | Missoula | 25 |
| 9 | Big Timber | 23 |
| 10 | Arlee | 22 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
115 Contributors
See all
LIVE AQI CITY RANKING
Real-time Montana
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Eureka | 3 |
| 2 | West Glendive | 4 |
| 3 | Malta | 7 |
| 4 | Pablo | 7 |
| 5 | Plains | 7 |
| 6 | Columbus | 8 |
| 7 | Crow Agency | 8 |
| 8 | Lambert | 8 |
| 9 | Ronan | 9 |
| 10 | Bigfork | 10 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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News
The latest air quality news and resources.
Montana air quality data attribution
115Contributors
- USA National Park Service
1 station
- Montana Department of Environmental Quality
3 stations
2 Government Contributors
- Nyet
1 station
- Abi D.
1 station
- Crosscut Mountain Sports Center
1 station
3 Individual Contributors
- 110 Anonymous contributors
110 stations
110 Anonymous Contributors
Which is the most polluted city in Montana?
- Thompson Falls 38
- Great Falls 37
- Kalispell 35
- East Helena 30
- Lewistown 26
- West Glacier 26
- Frenchtown 25
- Missoula 25
- Big Timber 23
- Arlee 22
- Livingston 22
- Big Sky 21
- Bonner-West Riverside 21
- Clinton 20
- Hamilton 20
- Helena 20
- Lolo 20
- Stevensville 20
- Anaconda 19
- Columbia Falls 19
- Ekalaka 19
- Absarokee 18
- Baker 18
- Birney 18
- Butte 18
- Colstrip 18
- Glendive 18
- Lame Deer 18
- Libby 18
- Seeley Lake 18
- Sidney 18
- Wibaux 18
- Belgrade 17
- Dillon 17
- Forsyth 17
- Bozeman 16
- Broadus 16
- Terry 16
- Choteau 15
- Circle 15
- Hot Springs 15
- Hysham 15
- Red Lodge 15
- Whitefish 15
- Winnett 15
- Helena Valley West Central 14
- Malmstrom Air Force Base 14
- Plentywood 14
- Scobey 14
- Sun Prairie 14
- Superior 14
- West Yellowstone 14
- Wisdom 14
- Wolf Point 14
- Conrad 13
- Fort Benton 13
- Four Corners 13
- Glasgow 13
- Hardin 13
- Jordan 13
- Laurel 13
- Lockwood 13
- Manhattan 13
- Noxon 13
- Ravalli 13
- Shelby 13
- Stanford 13
- Virginia City 13
- Billings 12
- Boulder 12
- Chinook 12
- Clancy 12
- Cut Bank 12
- Havre 12
- Helena Valley Northeast 12
- Helena Valley Northwest 12
- Helena Valley Southeast 12
- Helena West Side 12
- Montana City 12
- North Browning 12
- Roundup 12
- Three Forks 12
- Townsend 12
- White Sulphur Springs 12
- Fort Belknap Agency 11
- Lincoln 11
- Polson 11
- Whitehall 11
- Bigfork 10
- Browning 10
- Butte-Silver Bow (Balance) 10
- Charlo 10
- Chester 10
- Dayton 10
- Deer Lodge 10
- East Missoula 10
- Evergreen 10
- Harlowton 10
- Lakeside 10
- Miles City 10
- Orchard Homes 10
- Philipsburg 10
- Ryegate 10
- Somers 10
- Warm Springs 10
- Ronan 9
- South Browning 9
- Columbus 8
- Crow Agency 8
- Lambert 8
- Malta 7
- Pablo 7
- Plains 7
- West Glendive 4
- Eureka 3
AQI US, Metric