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Worst Air Quality ZIP Codes in Montana

Top 50 worst air quality zip codes in america in Montana. ZIP-level data from EPA Air Quality Index.

Top 50

#	ZIP Code	City / Suburb	Median AQI
1	59917	Indian Springs	49
2	59918	Fortine	49
3	59923	Happys Inn	49
4	59930	West Kootenai	49
5	59933	Stryker	49
6	59934	Trego	49
7	59935	Yaak	49
8	59401	Great Falls	46
9	59404	Great Falls	46
10	59405	Great Falls	46
11	59410	Augusta	46
12	59412	Riceville	46
13	59414	Black Eagle	46
14	59421	Hardy	46
15	59443	Fort Shaw	46
16	59463	Monarch	46
17	59465	Neihart	46
18	59472	Sand Coulee	46
19	59477	Simms	46
20	59480	Stockett	46
21	59483	Sun River	46
22	59485	Ulm	46
23	59487	Vaughn	46
24	59601	Helena	46
25	59602	Helena Valley Northeast	46
26	59623	Helena	46
27	59625	Helena	46
28	59633	Canyon Creek	46
29	59635	Spokane Creek	46
30	59636	Helena West Side	46
31	59639	Lincoln	46
32	59640	Marysville	46
33	59648	Milford Colony	46
34	59801	Missoula	43
35	59802	Missoula	43
36	59803	Missoula	43
37	59804	Orchard Homes	43
38	59808	Missoula	43
39	59812	Missoula	43
40	59821	Evaro	43
41	59823	Twin Creeks	43
42	59826	Condon	43
43	59834	Frenchtown	43
44	59846	Huson	43
45	59847	Lolo	43
46	59851	Bonner-West Riverside	43
47	59868	Seeley Lake	43
48	59901	Kalispell	42
49	59912	Columbia Falls	42
50	59913	Coram	42

Methodology

This ranking is based on EPA Air Quality Index data, scoped to Montana ZIP codes. Up to 50 ZIP codes are listed, ordered by median aqi. Data is refreshed periodically. See our methodology page for full details on data sources and update frequency.

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