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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 |  Eureka | 46 |
| 2 | Winnett | 46 |
| 3 | Libby | 45 |
| 4 | Seeley Lake | 43 |
| 5 | Havre | 39 |
| 6 | Great Falls | 37 |
| 7 | Helena | 35 |
| 8 | Miles City | 34 |
| 9 | Thompson Falls | 34 |
| 10 | Crow Agency | 33 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
112 Contributors
See all
LIVE AQI CITY RANKING
Real-time Montana
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Dillon | 6 |
| 2 | Big Sky | 8 |
| 3 | Malta | 11 |
| 4 | West Glacier | 11 |
| 5 | Wisdom | 11 |
| 6 | North Browning | 12 |
| 7 | Bozeman | 13 |
| 8 | West Yellowstone | 13 |
| 9 | Belgrade | 14 |
| 10 | Livingston | 14 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Unhealthy for sensitive groups
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News
The latest air quality news and resources.
Montana air quality data attribution
112Contributors
- USA National Park Service
5 stations
- 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
- 107 Anonymous contributors
107 stations
107 Anonymous Contributors
Which is the most polluted city in Montana?
- Eureka 46
- Sidney 46
- Winnett 46
- Libby 45
- Ekalaka 43
- Seeley Lake 43
- Colstrip 42
- Forsyth 42
- Wibaux 42
- Lame Deer 41
- Plentywood 41
- Baker 40
- Birney 40
- Terry 40
- Havre 39
- Hysham 39
- Circle 38
- Glendive 38
- Jordan 38
- Great Falls 37
- Wolf Point 37
- Scobey 36
- Glasgow 35
- Helena 35
- Miles City 34
- Thompson Falls 34
- Chinook 33
- Crow Agency 33
- Fort Belknap Agency 33
- Hot Springs 31
- Kalispell 30
- Malmstrom Air Force Base 30
- Pablo 30
- Frenchtown 29
- Sun Prairie 29
- Fort Benton 28
- White Sulphur Springs 28
- Columbia Falls 27
- Roundup 27
- Stanford 27
- West Glendive 27
- East Helena 26
- Harlowton 26
- Lockwood 26
- Shelby 26
- Butte 25
- Columbus 25
- Evergreen 25
- Helena Valley West Central 25
- Lewistown 25
- Townsend 25
- Chester 24
- Clancy 24
- Helena Valley Northeast 24
- Helena Valley Southeast 24
- Montana City 24
- Ryegate 24
- Somers 24
- Boulder 23
- Charlo 23
- Conrad 23
- Helena Valley Northwest 23
- Helena West Side 23
- Lakeside 23
- Lambert 23
- South Browning 23
- Three Forks 23
- Whitehall 23
- Broadus 22
- Dayton 22
- Hardin 22
- Laurel 22
- Manhattan 22
- Noxon 22
- Virginia City 22
- Butte-Silver Bow (Balance) 21
- Choteau 21
- Deer Lodge 21
- Four Corners 21
- Ravalli 21
- Stevensville 21
- Warm Springs 21
- Arlee 20
- Bigfork 20
- Browning 20
- Cut Bank 20
- Polson 20
- Ronan 20
- Plains 19
- Superior 19
- East Missoula 18
- Missoula 18
- Orchard Homes 18
- Philipsburg 18
- Anaconda 17
- Hamilton 17
- Whitefish 17
- Bonner-West Riverside 16
- Clinton 16
- Red Lodge 16
- Absarokee 15
- Big Timber 15
- Billings 15
- Lolo 15
- Belgrade 14
- Lincoln 14
- Livingston 14
- Bozeman 13
- West Yellowstone 13
- North Browning 12
- Malta 11
- West Glacier 11
- Wisdom 11
- Big Sky 8
- Dillon 6
AQI US, Metric