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 |  Butte | 51 |
| 2 | Helena | 38 |
| 3 | Missoula | 36 |
| 4 | East Helena | 35 |
| 5 | Thompson Falls | 35 |
| 6 | Malta | 28 |
| 7 | Red Lodge | 28 |
| 8 | Livingston | 27 |
| 9 | Kalispell | 26 |
| 10 | Big Timber | 25 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
117 Contributors
See all
LIVE AQI CITY RANKING
Real-time Montana
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | West Glacier | 6 |
| 2 | Chester | 7 |
| 3 | Seeley Lake | 7 |
| 4 | Whitefish | 7 |
| 5 | Cut Bank | 8 |
| 6 | Columbia Falls | 9 |
| 7 | Noxon | 9 |
| 8 | Frenchtown | 10 |
| 9 | Charlo | 12 |
| 10 | Crow Agency | 12 |
(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
117Contributors
- 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
- 112 Anonymous contributors
112 stations
112 Anonymous Contributors
Which is the most polluted city in Montana?
- Butte 51
- Helena 38
- Missoula 36
- East Helena 35
- Thompson Falls 35
- Malta 28
- Red Lodge 28
- Livingston 27
- Kalispell 26
- Big Timber 25
- Great Falls 25
- Townsend 25
- Anaconda 24
- Billings 24
- Columbus 23
- Hot Springs 23
- Big Sky 22
- Bozeman 22
- Sidney 22
- Bonner-West Riverside 21
- Hamilton 21
- Hardin 20
- Libby 20
- Miles City 20
- West Yellowstone 20
- Winnett 20
- Choteau 19
- Lewistown 19
- Pablo 19
- Belgrade 18
- Helena Valley West Central 18
- Lincoln 18
- Plentywood 18
- Ravalli 18
- Scobey 18
- Wolf Point 18
- Havre 17
- Absarokee 16
- Baker 16
- Birney 16
- Circle 16
- Clinton 16
- Ekalaka 16
- Glasgow 16
- Lambert 16
- Laurel 16
- Lockwood 16
- Ronan 16
- Stevensville 16
- Wibaux 16
- Wisdom 16
- Broadus 15
- Browning 15
- Glendive 15
- Lame Deer 15
- West Glendive 15
- Colstrip 14
- Dillon 14
- Forsyth 14
- Hysham 14
- Jordan 14
- Roundup 14
- Terry 14
- Arlee 13
- Bigfork 13
- Eureka 13
- Lolo 13
- Polson 13
- Charlo 12
- Crow Agency 12
- Fort Belknap Agency 12
- Four Corners 12
- Harlowton 12
- Manhattan 12
- Plains 12
- Ryegate 12
- Three Forks 12
- Virginia City 12
- Whitehall 12
- Boulder 11
- Clancy 11
- Helena Valley Northeast 11
- Helena Valley Northwest 11
- Helena Valley Southeast 11
- Helena West Side 11
- Montana City 11
- Stanford 11
- White Sulphur Springs 11
- Butte-Silver Bow (Balance) 10
- Chinook 10
- Fort Benton 10
- Frenchtown 10
- Malmstrom Air Force Base 10
- Sun Prairie 10
- Columbia Falls 9
- Deer Lodge 9
- Noxon 9
- Warm Springs 9
- Conrad 8
- Cut Bank 8
- Philipsburg 8
- Shelby 8
- Superior 8
- Chester 7
- Seeley Lake 7
- Whitefish 7
- East Missoula 6
- Orchard Homes 6
- West Glacier 6
- Dayton 5
- Evergreen 5
- Lakeside 5
- North Browning 5
- Somers 5
- South Browning 5
AQI US, Metric