Get a monitor and contributor to air quality data in your city.
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
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 |  Kalispell | 46 |
| 2 | Libby | 41 |
| 3 | Malta | 40 |
| 4 | Columbia Falls | 36 |
| 5 | Great Falls | 34 |
| 6 | Frenchtown | 32 |
| 7 | Thompson Falls | 31 |
| 8 | West Glacier | 31 |
| 9 | East Helena | 30 |
| 10 | Absarokee | 26 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
113 Contributors
See all
LIVE AQI CITY RANKING
Real-time Montana
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | West Glendive | 3 |
| 2 | Crow Agency | 8 |
| 3 | Eureka | 9 |
| 4 | Seeley Lake | 12 |
| 5 | Winnett | 12 |
| 6 | Browning | 13 |
| 7 | Columbus | 13 |
| 8 | Miles City | 13 |
| 9 | Choteau | 15 |
| 10 | Lambert | 15 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
News
The latest air quality news and resources.
Montana air quality data attribution
113Contributors
- USA National Park Service
1 station
- 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
- 108 Anonymous contributors
108 stations
108 Anonymous Contributors
Which is the most polluted city in Montana?
- Kalispell 46
- Libby 41
- Malta 40
- Columbia Falls 36
- Great Falls 34
- Frenchtown 32
- Thompson Falls 31
- West Glacier 31
- East Helena 30
- Absarokee 26
- Dillon 26
- Butte 25
- Helena 25
- Hot Springs 25
- Arlee 24
- Belgrade 24
- Big Timber 24
- Bozeman 24
- Livingston 24
- Noxon 24
- Stevensville 24
- West Yellowstone 24
- Bonner-West Riverside 23
- Cut Bank 23
- Ekalaka 23
- Lolo 23
- Missoula 23
- Chester 22
- Clinton 22
- Helena Valley West Central 22
- Pablo 22
- Plains 22
- Ronan 22
- Baker 21
- Big Sky 21
- Birney 21
- Charlo 21
- Hamilton 21
- Havre 21
- Terry 21
- Anaconda 20
- Ravalli 20
- Wibaux 20
- Wisdom 20
- Broadus 19
- Colstrip 19
- Glendive 19
- Hardin 19
- Lame Deer 19
- Plentywood 19
- Polson 19
- Sidney 19
- Forsyth 18
- Whitefish 18
- Bigfork 17
- Billings 16
- Conrad 16
- Fort Benton 16
- Four Corners 16
- Harlowton 16
- Lewistown 16
- Red Lodge 16
- Shelby 16
- Choteau 15
- Lambert 15
- Ryegate 15
- Chinook 14
- Circle 14
- Fort Belknap Agency 14
- Hysham 14
- Jordan 14
- Laurel 14
- Lockwood 14
- Roundup 14
- Superior 14
- Browning 13
- Columbus 13
- Glasgow 13
- Malmstrom Air Force Base 13
- Miles City 13
- Scobey 13
- Sun Prairie 13
- Wolf Point 13
- North Browning 12
- Seeley Lake 12
- Winnett 12
- Boulder 11
- Butte-Silver Bow (Balance) 11
- Clancy 11
- Dayton 11
- Deer Lodge 11
- East Missoula 11
- Evergreen 11
- Helena Valley Northeast 11
- Helena Valley Northwest 11
- Helena Valley Southeast 11
- Helena West Side 11
- Lakeside 11
- Lincoln 11
- Manhattan 11
- Montana City 11
- Orchard Homes 11
- Philipsburg 11
- Somers 11
- South Browning 11
- Stanford 11
- Three Forks 11
- Townsend 11
- Virginia City 11
- Warm Springs 11
- White Sulphur Springs 11
- Whitehall 11
- Eureka 9
- Crow Agency 8
- West Glendive 3
AQI US, Metric