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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 |  Broadus | 38 |
| 2 | Libby | 38 |
| 3 | East Helena | 26 |
| 4 | Great Falls | 25 |
| 5 | Lincoln | 25 |
| 6 | Browning | 22 |
| 7 | Malta | 22 |
| 8 | Belgrade | 20 |
| 9 | Big Timber | 18 |
| 10 | Helena | 17 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
117 Contributors
See all
LIVE AQI CITY RANKING
Real-time Montana
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Anaconda | 0 |
| 2 | Lewistown | 0 |
| 3 | Frenchtown | 6 |
| 4 | Hardin | 6 |
| 5 | West Glendive | 6 |
| 6 | Bonner-West Riverside | 7 |
| 7 | Crow Agency | 8 |
| 8 | Seeley Lake | 8 |
| 9 | West Glacier | 8 |
| 10 | Havre | 9 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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The latest air quality news and resources.
Montana air quality data attribution
117Contributors
- USA National Park Service
5 stations
- Montana Department of Environmental Quality
3 stations
2 Government Contributors
- AirGradient
1 station
Corporate Contributor
- Nyet
1 station
- Abi D.
1 station
- Crosscut Mountain Sports Center
1 station
3 Individual Contributors
111 Anonymous contributors111 stations
111 Anonymous Contributors
Which is the most polluted city in Montana?
- Broadus 38
- Libby 38
- Ekalaka 33
- Baker 32
- Birney 28
- Lame Deer 28
- Colstrip 27
- East Helena 26
- Great Falls 25
- Lincoln 25
- Browning 22
- Malta 22
- Belgrade 20
- Wibaux 19
- Big Timber 18
- Superior 18
- Evergreen 17
- Forsyth 17
- Helena 17
- Thompson Falls 17
- Choteau 16
- Dayton 16
- Hot Springs 16
- Kalispell 16
- Lakeside 16
- Orchard Homes 16
- Somers 16
- Bozeman 15
- Circle 15
- Deer Lodge 15
- East Missoula 15
- Glendive 15
- Philipsburg 15
- Plains 15
- Red Lodge 15
- Stevensville 15
- Terry 15
- Warm Springs 15
- Winnett 15
- Billings 14
- Butte 14
- Columbus 14
- Dillon 14
- Glasgow 14
- Hysham 14
- Jordan 14
- Lambert 14
- Laurel 14
- Lockwood 14
- Noxon 14
- Pablo 14
- Plentywood 14
- Polson 14
- Scobey 14
- Sidney 14
- Virginia City 14
- Wolf Point 14
- Butte-Silver Bow (Balance) 13
- Chester 13
- Conrad 13
- Cut Bank 13
- Helena Valley West Central 13
- Livingston 13
- Ravalli 13
- Shelby 13
- South Browning 13
- West Yellowstone 13
- Arlee 12
- Big Sky 12
- Boulder 12
- Charlo 12
- Clancy 12
- Columbia Falls 12
- Fort Benton 12
- Four Corners 12
- Hamilton 12
- Helena Valley Northeast 12
- Helena Valley Northwest 12
- Helena Valley Southeast 12
- Helena West Side 12
- Malmstrom Air Force Base 12
- Manhattan 12
- Montana City 12
- Sun Prairie 12
- Three Forks 12
- Townsend 12
- White Sulphur Springs 12
- Whitehall 12
- Absarokee 11
- Clinton 11
- Harlowton 11
- Lolo 11
- Missoula 11
- North Browning 11
- Ronan 11
- Roundup 11
- Ryegate 11
- Bigfork 10
- Chinook 10
- Eureka 10
- Fort Belknap Agency 10
- Stanford 10
- Whitefish 10
- Havre 9
- Miles City 9
- Crow Agency 8
- Seeley Lake 8
- West Glacier 8
- Bonner-West Riverside 7
- Frenchtown 6
- Hardin 6
- West Glendive 6
- Wisdom 3
- Anaconda 0
- Lewistown 0
AQI US, Metric