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 |  Malta | 49 |
| 2 | Dillon | 39 |
| 3 | Broadus | 38 |
| 4 | East Helena | 37 |
| 5 | Hot Springs | 36 |
| 6 | Hamilton | 35 |
| 7 | Townsend | 33 |
| 8 | Clinton | 31 |
| 9 | Missoula | 30 |
| 10 | Stevensville | 30 |
(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 | Choteau | 8 |
| 2 | West Yellowstone | 9 |
| 3 | Lambert | 11 |
| 4 | Lincoln | 11 |
| 5 | Seeley Lake | 12 |
| 6 | Red Lodge | 13 |
| 7 | Lewistown | 14 |
| 8 | Crow Agency | 15 |
| 9 | Eureka | 15 |
| 10 | Libby | 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
115Contributors
- 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
- 110 Anonymous contributors
110 stations
110 Anonymous Contributors
Which is the most polluted city in Montana?
- Malta 49
- Dillon 39
- Broadus 38
- East Helena 37
- Hot Springs 36
- Hamilton 35
- Townsend 33
- Clinton 31
- Pablo 31
- Missoula 30
- Stevensville 30
- Helena 29
- Charlo 28
- Big Timber 27
- Butte 27
- Kalispell 27
- Bozeman 26
- Belgrade 25
- Big Sky 25
- Great Falls 25
- Helena Valley West Central 25
- Ravalli 25
- Livingston 24
- Noxon 24
- Wisdom 24
- Absarokee 23
- Arlee 23
- Bonner-West Riverside 23
- Chester 23
- Cut Bank 23
- Orchard Homes 23
- Ronan 23
- Thompson Falls 23
- Billings 22
- Dayton 22
- East Missoula 22
- Evergreen 22
- Havre 22
- Lakeside 22
- Philipsburg 22
- Somers 22
- Superior 22
- Columbia Falls 21
- Deer Lodge 21
- Miles City 21
- Scobey 21
- Warm Springs 21
- Anaconda 20
- Boulder 20
- Butte-Silver Bow (Balance) 20
- Clancy 20
- Columbus 20
- Four Corners 20
- Helena West Side 20
- Lolo 20
- Manhattan 20
- Virginia City 20
- West Glacier 20
- Bigfork 19
- Glasgow 19
- Helena Valley Northeast 19
- Helena Valley Northwest 19
- Helena Valley Southeast 19
- Laurel 19
- Lockwood 19
- Montana City 19
- Shelby 19
- Sidney 19
- South Browning 19
- Three Forks 19
- White Sulphur Springs 19
- Whitehall 19
- Winnett 19
- Wolf Point 19
- Circle 18
- Conrad 18
- Fort Benton 18
- Hardin 18
- Plains 18
- Plentywood 18
- Polson 18
- Birney 17
- Browning 17
- Chinook 17
- Fort Belknap Agency 17
- Frenchtown 17
- Harlowton 17
- Lame Deer 17
- Malmstrom Air Force Base 17
- Roundup 17
- Ryegate 17
- Stanford 17
- Sun Prairie 17
- Colstrip 16
- Baker 15
- Crow Agency 15
- Ekalaka 15
- Eureka 15
- Forsyth 15
- Glendive 15
- Hysham 15
- Jordan 15
- Libby 15
- Terry 15
- Whitefish 15
- Wibaux 15
- Lewistown 14
- West Glendive 14
- Red Lodge 13
- Seeley Lake 12
- Lambert 11
- Lincoln 11
- West Yellowstone 9
- Choteau 8
- North Browning 8
AQI US, Metric