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 |  Lambert | 37 |
| 2 | Libby | 33 |
| 3 | Cut Bank | 30 |
| 4 | East Helena | 30 |
| 5 | West Glacier | 29 |
| 6 | Thompson Falls | 26 |
| 7 | Belgrade | 25 |
| 8 | Great Falls | 25 |
| 9 | Hot Springs | 25 |
| 10 | Arlee | 24 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
114 Contributors
See all
LIVE AQI CITY RANKING
Real-time Montana
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Dillon | 7 |
| 2 | Hardin | 12 |
| 3 | Red Lodge | 13 |
| 4 | Wisdom | 13 |
| 5 | Big Sky | 15 |
| 6 | Bigfork | 15 |
| 7 | Billings | 15 |
| 8 | Crow Agency | 15 |
| 9 | Plains | 15 |
| 10 | Bonner-West Riverside | 16 |
(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
114Contributors
- 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
- 109 Anonymous contributors
109 stations
109 Anonymous Contributors
Which is the most polluted city in Montana?
- Sidney 42
- Plentywood 39
- Scobey 39
- Wibaux 38
- Baker 37
- Ekalaka 37
- Lambert 37
- Wolf Point 35
- Glendive 34
- Birney 33
- Colstrip 33
- Lame Deer 33
- Libby 33
- Terry 32
- Cut Bank 30
- East Helena 30
- Circle 29
- Forsyth 29
- Fort Belknap Agency 29
- Glasgow 29
- West Glacier 29
- Four Corners 28
- Virginia City 28
- Chinook 27
- Jordan 27
- Manhattan 27
- Butte-Silver Bow (Balance) 26
- East Missoula 26
- Orchard Homes 26
- Philipsburg 26
- Thompson Falls 26
- Three Forks 26
- Belgrade 25
- Fort Benton 25
- Great Falls 25
- Harlowton 25
- Hot Springs 25
- Hysham 25
- Laurel 25
- Lockwood 25
- Malmstrom Air Force Base 25
- Roundup 25
- Ryegate 25
- Stanford 25
- Superior 25
- Townsend 25
- Warm Springs 25
- White Sulphur Springs 25
- Arlee 24
- Boulder 24
- Clancy 24
- Deer Lodge 24
- Frenchtown 24
- Helena Valley Southeast 24
- Helena West Side 24
- Lincoln 24
- Montana City 24
- Pablo 24
- Whitehall 24
- Butte 23
- Columbus 23
- Conrad 23
- Eureka 23
- Helena Valley Northeast 23
- Helena Valley Northwest 23
- Livingston 23
- Stevensville 23
- Sun Prairie 23
- Browning 22
- Clinton 22
- Dayton 22
- Evergreen 22
- Lakeside 22
- Malta 22
- Missoula 22
- Ravalli 22
- Ronan 22
- Seeley Lake 22
- Shelby 22
- Somers 22
- Winnett 22
- Helena 21
- Kalispell 21
- Broadus 20
- Charlo 20
- Hamilton 20
- Anaconda 19
- Chester 19
- Columbia Falls 19
- Noxon 19
- South Browning 19
- West Glendive 19
- Big Timber 18
- Bozeman 18
- Lolo 18
- Polson 18
- Whitefish 18
- Absarokee 17
- Choteau 17
- Helena Valley West Central 17
- Miles City 17
- West Yellowstone 17
- Bonner-West Riverside 16
- Havre 16
- Lewistown 16
- Big Sky 15
- Bigfork 15
- Billings 15
- Crow Agency 15
- Plains 15
- Red Lodge 13
- Wisdom 13
- Hardin 12
- North Browning 12
- Dillon 7
AQI US, Metric