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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 | 52 |
| 2 | Great Falls | 45 |
| 3 | West Glacier | 38 |
| 4 | Helena | 36 |
| 5 | Cut Bank | 29 |
| 6 | East Helena | 28 |
| 7 | Browning | 26 |
| 8 | Chester | 25 |
| 9 | Columbia Falls | 25 |
| 10 | Eureka | 25 |
(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 | West Yellowstone | 2 |
| 2 | Big Sky | 4 |
| 3 | Malta | 4 |
| 4 | Dillon | 8 |
| 5 | Seeley Lake | 10 |
| 6 | Noxon | 11 |
| 7 | Red Lodge | 12 |
| 8 | Lambert | 13 |
| 9 | Libby | 14 |
| 10 | Miles City | 14 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Moderate
Unhealthy for sensitive groups
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News
The latest air quality news and resources.
Montana air quality data attribution
115Contributors
- USA National Park Service
4 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
- 110 Anonymous contributors
110 stations
110 Anonymous Contributors
Which is the most polluted city in Montana?
- Broadus 52
- Great Falls 45
- West Glacier 38
- Helena 36
- Cut Bank 29
- East Helena 28
- Browning 26
- Chester 25
- Columbia Falls 25
- Eureka 25
- Kalispell 24
- Pablo 24
- Whitefish 24
- Absarokee 23
- Belgrade 22
- Bozeman 22
- Charlo 22
- Clinton 22
- Columbus 21
- Livingston 21
- Choteau 20
- Crow Agency 20
- Lincoln 20
- Big Timber 19
- Bigfork 19
- Birney 19
- Butte 19
- Fort Benton 19
- Frenchtown 19
- Hamilton 19
- Hardin 19
- Hot Springs 19
- Ronan 19
- Shelby 19
- Arlee 18
- Billings 18
- Havre 18
- Helena Valley West Central 18
- Stevensville 18
- Bonner-West Riverside 17
- Lame Deer 17
- Missoula 17
- North Browning 17
- Plains 17
- Ravalli 17
- Anaconda 16
- Conrad 16
- Helena Valley Northeast 16
- Helena Valley Northwest 16
- Helena Valley Southeast 16
- Malmstrom Air Force Base 16
- Montana City 16
- Polson 16
- Stanford 16
- Sun Prairie 16
- Thompson Falls 16
- West Glendive 16
- Boulder 15
- Clancy 15
- Colstrip 15
- Dayton 15
- Ekalaka 15
- Evergreen 15
- Forsyth 15
- Harlowton 15
- Helena West Side 15
- Hysham 15
- Jordan 15
- Lakeside 15
- Laurel 15
- Lewistown 15
- Lockwood 15
- Lolo 15
- Roundup 15
- Ryegate 15
- Somers 15
- South Browning 15
- Winnett 15
- Chinook 14
- Fort Belknap Agency 14
- Libby 14
- Miles City 14
- Townsend 14
- Wisdom 14
- Baker 13
- Lambert 13
- Terry 13
- Four Corners 12
- Manhattan 12
- Red Lodge 12
- Superior 12
- Three Forks 12
- White Sulphur Springs 12
- Butte-Silver Bow (Balance) 11
- Deer Lodge 11
- East Missoula 11
- Noxon 11
- Orchard Homes 11
- Philipsburg 11
- Warm Springs 11
- Whitehall 11
- Seeley Lake 10
- Circle 9
- Virginia City 9
- Dillon 8
- Glendive 8
- Glasgow 6
- Wibaux 5
- Wolf Point 5
- Big Sky 4
- Malta 4
- Plentywood 4
- Scobey 4
- Sidney 4
- West Yellowstone 2
AQI US, Metric