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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 |  Sidney | 72 |
| 2 | Lambert | 64 |
| 3 | Columbia Falls | 56 |
| 4 | Corvallis | 55 |
| 5 | Great Falls | 55 |
| 6 | Coram | 53 |
| 7 | Pablo | 53 |
| 8 | Charlo | 52 |
| 9 | Polson | 52 |
| 10 | Ronan | 51 |
(Local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
127 Contributors
See all
3D animated air pollution map
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Unhealthy for sensitive groups
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News
The latest air quality news and resources.
Montana air quality data attribution
127Contributors
- Montana Department of Environmental Quality
21 stations
- USA National Park Service
4 stations
2 Government Contributors
- Nyet
1 station
- Abi D.
1 station
- Crosscut Mountain Sports Center
1 station
- Bellamoo
1 station
- EMBG
1 station
5 Individual Contributors
120 Anonymous contributors120 stations
120 Anonymous Contributors
Which is the most polluted city in Montana?
- Sidney 72
- Lambert 64
- Baker 58
- Glendive 58
- Wibaux 58
- Terry 57
- Circle 56
- Columbia Falls 56
- Ekalaka 56
- Lolo 56
- Orchard Homes 56
- Superior 56
- Big Arm 55
- Bonner-West Riverside 55
- Corvallis 55
- Darby 55
- Great Falls 55
- Plentywood 55
- Ravalli 55
- Scobey 55
- Wolf Point 55
- Dayton 54
- Forsyth 54
- Glasgow 54
- Jordan 54
- Lakeside 54
- Somers 54
- Sula 54
- Coram 53
- Evergreen 53
- Hysham 53
- Pablo 53
- Charlo 52
- Colstrip 52
- Philipsburg 52
- Polson 52
- Roundup 52
- Wisdom 52
- Fort Belknap Agency 51
- Ronan 51
- Arlee 49
- Hot Springs 47
- Kalispell 47
- Martin City 47
- Plains 47
- West Glendive 47
- Bigfork 46
- Libby 44
- West Glacier 43
- Lame Deer 42
- Ryegate 41
- Missoula 40
- Browning 39
- Frenchtown 39
- Crow Agency 38
- Cut Bank 38
- Polebridge 38
- Thompson Falls 38
- Eureka 34
- Victor 34
- Whitefish 34
- Stevensville 32
- Chester 31
- Noxon 31
- Anaconda 29
- Billings 29
- Birney 29
- Hardin 29
- Ulm 29
- Warm Springs 27
- Winnett 27
- Butte-Silver Bow (Balance) 26
- Chinook 26
- Deer Lodge 26
- Lockwood 26
- Manhattan 26
- Boulder 25
- Cascade 25
- Three Forks 25
- Greenough 24
- Harlowton 24
- Pryor 24
- Townsend 24
- Whitehall 24
- Laurel 23
- Clancy 22
- Columbus 22
- Craig 22
- Four Corners 22
- Helena West Side 22
- North Browning 22
- East Glacier Park 21
- Helena 21
- Montana City 21
- Potomac 21
- White Sulphur Springs 21
- Absarokee 20
- Havre 20
- Broadus 19
- Helena Valley Southeast 19
- Miles City 19
- Virginia City 19
- Clinton 18
- Dillon 18
- East Helena 18
- Helena Valley West Central 18
- Lincoln 18
- Big Timber 17
- Seeley Lake 17
- South Browning 17
- Helena Valley Northeast 16
- Helena Valley Northwest 16
- Troy 16
- Alta 15
- Red Lodge 15
- Shelby 15
- Stanford 15
- Belgrade 14
- East Missoula 14
- Livingston 14
- Malmstrom Air Force Base 14
- Conrad 13
- Fort Benton 13
- Sun Prairie 13
- Ennis 12
- Hamilton 10
- Wilsall 10
- Bozeman 9
- Butte 9
- Big Sky 8
- Lewistown 7
- Choteau 6
- Gardiner 6
- Malta 1
- West Yellowstone 0
AQI US, Metric