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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 | 61 |
| 2 | Malta | 39 |
| 3 | Belgrade | 29 |
| 4 | Miles City | 29 |
| 5 | Great Falls | 24 |
| 6 | East Helena | 20 |
| 7 | Lambert | 20 |
| 8 | Lewistown | 20 |
| 9 | Virginia City | 20 |
| 10 | Bonner-West Riverside | 19 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
118 Contributors
See all
LIVE AQI CITY RANKING
Real-time Montana
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Crow Agency | 5 |
| 2 | Browning | 6 |
| 3 | Libby | 6 |
| 4 | Columbia Falls | 7 |
| 5 | Eureka | 8 |
| 6 | Ronan | 8 |
| 7 | Bigfork | 9 |
| 8 | Lolo | 9 |
| 9 | North Browning | 9 |
| 10 | West Glendive | 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
118Contributors
- 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
112 Anonymous contributors112 stations
112 Anonymous Contributors
Which is the most polluted city in Montana?
- Birney 70
- Laurel 70
- Lame Deer 68
- Lockwood 68
- Colstrip 66
- Ryegate 66
- Ekalaka 63
- Harlowton 63
- Roundup 63
- Hysham 62
- Broadus 61
- Forsyth 60
- Fort Benton 60
- Malmstrom Air Force Base 60
- Stanford 60
- Sun Prairie 60
- White Sulphur Springs 60
- Baker 59
- Conrad 59
- Jordan 59
- Terry 59
- Shelby 58
- Chinook 57
- Cut Bank 57
- Fort Belknap Agency 56
- Glendive 55
- Wibaux 55
- Helena Valley Northeast 53
- Townsend 52
- Helena Valley Southeast 51
- Helena Valley Northwest 47
- Montana City 43
- Circle 42
- Malta 39
- Clancy 34
- Belgrade 29
- Helena West Side 29
- Manhattan 29
- Miles City 29
- Plentywood 28
- Scobey 28
- Glasgow 27
- Sidney 27
- Four Corners 24
- Great Falls 24
- South Browning 21
- Boulder 20
- East Helena 20
- Lambert 20
- Lewistown 20
- Lincoln 20
- Three Forks 20
- Virginia City 20
- Bonner-West Riverside 19
- Bozeman 19
- Chester 19
- Clinton 19
- Frenchtown 19
- Helena 19
- Hot Springs 19
- Thompson Falls 19
- Big Timber 18
- Deer Lodge 18
- East Missoula 18
- Helena Valley West Central 18
- Orchard Homes 18
- Philipsburg 18
- Warm Springs 18
- West Yellowstone 18
- Whitehall 18
- Wolf Point 18
- Billings 17
- Butte 17
- Livingston 17
- Stevensville 17
- Butte-Silver Bow (Balance) 16
- Choteau 16
- Dayton 16
- Lakeside 16
- Somers 16
- Winnett 16
- Absarokee 15
- Anaconda 15
- Big Sky 15
- Charlo 15
- Dillon 15
- Evergreen 15
- Hamilton 15
- Havre 15
- Ravalli 15
- Seeley Lake 15
- Hardin 14
- Pablo 14
- West Glacier 14
- Columbus 13
- Whitefish 13
- Kalispell 12
- Noxon 12
- Wisdom 12
- Plains 11
- Superior 11
- Arlee 10
- Missoula 10
- Polson 10
- Red Lodge 10
- Bigfork 9
- Lolo 9
- North Browning 9
- West Glendive 9
- Eureka 8
- Ronan 8
- Columbia Falls 7
- Browning 6
- Libby 6
- Crow Agency 5
AQI US, Metric