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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 |  Great Falls | 55 |
| 2 | Broadus | 53 |
| 3 | Lambert | 53 |
| 4 | Chester | 48 |
| 5 | Havre | 38 |
| 6 | Cut Bank | 37 |
| 7 | Browning | 33 |
| 8 | East Helena | 33 |
| 9 | Libby | 32 |
| 10 | North Browning | 29 |
(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 | Lewistown | 6 |
| 2 | Big Sky | 8 |
| 3 | Bigfork | 9 |
| 4 | Seeley Lake | 9 |
| 5 | West Yellowstone | 9 |
| 6 | Bonner-West Riverside | 11 |
| 7 | Plains | 11 |
| 8 | Dillon | 12 |
| 9 | Polson | 12 |
| 10 | Red Lodge | 12 |
(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?
- Great Falls 55
- Broadus 53
- Lambert 53
- Scobey 52
- Plentywood 49
- Chester 48
- Wolf Point 44
- Glasgow 40
- Havre 38
- Cut Bank 37
- Sidney 37
- Circle 35
- Browning 33
- East Helena 33
- Fort Belknap Agency 33
- Chinook 32
- Libby 32
- Glendive 31
- West Glendive 31
- Wibaux 31
- Shelby 30
- Conrad 29
- Laurel 29
- North Browning 29
- Baker 28
- Terry 28
- Winnett 28
- Ekalaka 27
- Jordan 27
- Fort Benton 26
- Lockwood 26
- Ryegate 25
- South Browning 25
- Townsend 25
- Birney 24
- Colstrip 24
- Evergreen 24
- Forsyth 24
- Lame Deer 24
- Butte 23
- Harlowton 23
- Hysham 23
- Dayton 22
- Four Corners 22
- Lakeside 22
- Malta 22
- Roundup 22
- Somers 22
- Stanford 22
- Virginia City 22
- Billings 21
- Frenchtown 21
- Helena 21
- Hot Springs 21
- Livingston 21
- Malmstrom Air Force Base 21
- Manhattan 21
- Superior 21
- East Missoula 20
- Eureka 20
- Lincoln 20
- Orchard Homes 20
- Pablo 20
- Stevensville 20
- Sun Prairie 20
- Wisdom 20
- Arlee 19
- Belgrade 19
- Miles City 19
- Thompson Falls 19
- Three Forks 19
- Columbia Falls 18
- Columbus 18
- Crow Agency 18
- Charlo 17
- Kalispell 17
- White Sulphur Springs 17
- Helena Valley Northeast 16
- Helena Valley Northwest 16
- Helena Valley Southeast 16
- Missoula 16
- Noxon 16
- Philipsburg 16
- West Glacier 16
- Bozeman 15
- Clancy 15
- Clinton 15
- Deer Lodge 15
- Helena West Side 15
- Montana City 15
- Ravalli 15
- Ronan 15
- Whitefish 15
- Absarokee 14
- Anaconda 14
- Boulder 14
- Choteau 14
- Hamilton 14
- Helena Valley West Central 14
- Whitehall 14
- Big Timber 13
- Butte-Silver Bow (Balance) 13
- Hardin 13
- Warm Springs 13
- Dillon 12
- Polson 12
- Red Lodge 12
- Bonner-West Riverside 11
- Plains 11
- Bigfork 9
- Seeley Lake 9
- West Yellowstone 9
- Big Sky 8
- Lolo 8
- Lewistown 6
AQI US, Metric