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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 | Great Falls | 38 |
| 2 | Malta | 35 |
| 3 | Clinton | 34 |
| 4 | Miles City | 30 |
| 5 | East Helena | 27 |
| 6 | Lewistown | 27 |
| 7 | Pablo | 24 |
| 8 | Lambert | 23 |
| 9 | Chester | 20 |
| 10 | Helena | 20 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
121 Contributors
See all
3D animated air pollution map
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Moderate
Unhealthy for sensitive groups
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News
The latest air quality news and resources.
Montana air quality data attribution
121Contributors
- 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
- 116 Anonymous contributors
116 stations
116 Anonymous Contributors
Which is the most polluted city in Montana?
- Great Falls 38
- Malta 35
- Clinton 34
- Miles City 30
- East Helena 27
- Lewistown 27
- Pablo 24
- Lambert 23
- Chester 20
- Fort Benton 20
- Helena 20
- Malmstrom Air Force Base 20
- Sun Prairie 20
- Conrad 18
- Havre 18
- Missoula 17
- Broadus 16
- Charlo 16
- Plentywood 16
- Columbus 15
- Crow Agency 15
- Frenchtown 15
- Shelby 15
- West Glacier 15
- Circle 14
- Cut Bank 14
- Glasgow 14
- Jordan 14
- Thompson Falls 14
- Absarokee 13
- Baker 13
- Billings 13
- Butte 13
- Colstrip 13
- Ekalaka 13
- Forsyth 13
- Glendive 13
- Hardin 13
- Hysham 13
- Lame Deer 13
- Laurel 13
- Scobey 13
- Stanford 13
- Terry 13
- West Glendive 13
- Wibaux 13
- Winnett 13
- Wolf Point 13
- Chinook 12
- Hot Springs 12
- Sidney 12
- Fort Belknap Agency 11
- Harlowton 11
- Lockwood 11
- Noxon 11
- Roundup 11
- Ryegate 11
- Townsend 11
- White Sulphur Springs 11
- Birney 10
- Bonner-West Riverside 10
- Choteau 10
- Evergreen 10
- Manhattan 10
- South Browning 10
- Three Forks 10
- Big Timber 9
- Clancy 9
- Helena Valley Northwest 9
- Helena Valley Southeast 9
- Helena Valley West Central 9
- Helena West Side 9
- Montana City 9
- Seeley Lake 9
- Stevensville 9
- Virginia City 9
- Boulder 8
- Deer Lodge 8
- Four Corners 8
- Helena Valley Northeast 8
- Livingston 8
- Somers 8
- West Yellowstone 8
- Butte-Silver Bow (Balance) 7
- Columbia Falls 7
- East Missoula 7
- Eureka 7
- Hamilton 7
- Lakeside 7
- Philipsburg 7
- Red Lodge 7
- Ronan 7
- Superior 7
- Warm Springs 7
- Whitehall 7
- Dayton 6
- Kalispell 6
- Whitefish 6
- Arlee 5
- Bozeman 5
- Browning 5
- North Browning 5
- Orchard Homes 5
- Plains 5
- Polson 5
- Anaconda 4
- Libby 4
- Belgrade 3
- Bigfork 3
- Lincoln 3
- Ravalli 3
- Big Sky 2
- Dillon 2
- Lolo 1
- Wisdom 1
AQI US, Metric