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 |  Clinton | 61 |
| 2 | Great Falls | 43 |
| 3 | Pablo | 41 |
| 4 | Malta | 36 |
| 5 | Libby | 27 |
| 6 | Miles City | 25 |
| 7 | Lambert | 23 |
| 8 | West Glendive | 21 |
| 9 | Stevensville | 19 |
| 10 | East Helena | 18 |
(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 | Absarokee | 0 |
| 2 | Havre | 1 |
| 3 | Red Lodge | 1 |
| 4 | Big Timber | 2 |
| 5 | Dillon | 2 |
| 6 | Big Sky | 3 |
| 7 | Hardin | 3 |
| 8 | Helena Valley West Central | 4 |
| 9 | Billings | 5 |
| 10 | Bonner-West Riverside | 5 |
(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
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?
- Clinton 61
- Great Falls 43
- Pablo 41
- Malta 36
- Libby 27
- Miles City 25
- Fort Belknap Agency 23
- Fort Benton 23
- Lambert 23
- Chinook 22
- Circle 22
- Ekalaka 22
- Glasgow 22
- Sidney 22
- Wolf Point 22
- Baker 21
- Conrad 21
- Jordan 21
- Scobey 21
- West Glendive 21
- Winnett 21
- Forsyth 20
- Glendive 20
- Hysham 20
- Plentywood 20
- Shelby 20
- Sun Prairie 20
- Wibaux 20
- Malmstrom Air Force Base 19
- Stevensville 19
- Terry 19
- East Helena 18
- Kalispell 18
- Charlo 17
- Colstrip 17
- Superior 17
- Broadus 16
- Lame Deer 16
- South Browning 16
- Birney 15
- Hot Springs 15
- Hamilton 14
- Thompson Falls 14
- West Glacier 14
- Belgrade 13
- East Missoula 13
- Evergreen 13
- Orchard Homes 13
- Roundup 13
- Bigfork 12
- Cut Bank 12
- Frenchtown 12
- Helena 11
- North Browning 11
- Noxon 11
- Seeley Lake 11
- Somers 11
- Browning 10
- Chester 10
- Dayton 10
- Lakeside 10
- Lewistown 10
- Livingston 10
- Plains 10
- Polson 10
- Stanford 10
- Columbia Falls 9
- Eureka 9
- Helena Valley Northeast 9
- Helena Valley Northwest 9
- Whitefish 9
- Helena Valley Southeast 8
- Helena West Side 8
- Lincoln 8
- Lockwood 8
- Lolo 8
- Montana City 8
- Ronan 8
- Anaconda 7
- Bozeman 7
- Clancy 7
- Missoula 7
- West Yellowstone 7
- Arlee 6
- Boulder 6
- Butte 6
- Crow Agency 6
- Deer Lodge 6
- Philipsburg 6
- Townsend 6
- Billings 5
- Bonner-West Riverside 5
- Butte-Silver Bow (Balance) 5
- Four Corners 5
- Harlowton 5
- Laurel 5
- Manhattan 5
- Ravalli 5
- Ryegate 5
- Three Forks 5
- Virginia City 5
- Warm Springs 5
- White Sulphur Springs 5
- Whitehall 5
- Wisdom 5
- Helena Valley West Central 4
- Big Sky 3
- Hardin 3
- Big Timber 2
- Dillon 2
- Havre 1
- Red Lodge 1
- Absarokee 0
- Columbus 0
AQI US, Metric