Water Quality in Montana
EPA violation data for public water systems across Montana.
369
ZIP Codes
7,619
Total Violations
75 (20%)
ZIPs with 0 Violations
20.6
Avg per ZIP
National avg: 18.87 violations per ZIP.
Montana is 9% above average.
Violation Map
Loading map...
0
1-5
6-15
16+
EPA violations (5yr)
Most Affected Areas in Montana
All ZIP Codes in Montana (369)
59855 Pablo
230 59102 Billings
222 59047 Corwin Springs
208 59602 Helena
201 59758 Bozeman
195 59022 Crow Agency
164 59840 Hamilton
163 59901 Kalispell
150 59349 Miles City
146 59601 Helena
144 59330 Glendive
139 59801 Missoula
131 59714 Bozeman
124 59404 Great Falls
113 59718 Bozeman
113 59715 Bozeman
96 59105 Billings
94 59864 Ronan
91 59923 Libby
91 59873 Thompson Falls
90 59730 Bozeman
87 59634 Clancy
81 59313 Baker
79 59270 Sidney
76 59735 Harrison
76 59937 Kalispell
76 59101 Billings
74 59417 Browning
71 59648 Helena
71 59635 Helena
70 59624 Helena
67 59804 Missoula
61 59430 Denton
60 59823 Missoula
60 59230 Glasgow
59 59410 Helena
59 59526 Harlem
59 59912 Kalispell
59 59639 Helena
58 59035 Fort Smith
57 59914 Dayton
53 59274 Vida
51 59106 Billings
48 59821 Missoula
48 59034 Hardin
47 59725 Dillon
47 59803 Missoula
47 59301 Miles City
44 59746 Polaris
44 59917 Eureka
44 59027 Corwin Springs
42 59457 Lewistown
40 59522 Chester
39 59701 Butte
39 59762 Anaconda
39 59828 Corvallis
39 59003 Ashland
38 59807 Missoula
38 59337 Jordan
37 59741 Bozeman
37 59903 Kalispell
37 59604 Helena
36 59729 Ennis
36 59043 Lame Deer
35 59752 Bozeman
35 59720 Cameron
33 59759 Butte
33 59865 St Ignatius
33 59079 Billings
32 59416 Brady
32 59870 Stevensville
31 59501 Havre
30 59645 White Sulphur Springs
30 59808 Missoula
30 59911 Kalispell
29 59016 Busby
28 59071 Roscoe
28 59405 Great Falls
28 59538 Malta
28 59806 Missoula
28 59041 Billings
27 59702 Butte
27 59858 Philipsburg
27 59925 Kalispell
27 59411 Babb
26 59633 Helena
26 59750 Butte
26 59833 Missoula
26 59935 Troy
26 59422 Choteau
25 59524 Dodson
25 59711 Butte
25 59104 Billings
24 59223 Fort Peck
24 59063 Billings
23 59834 Missoula
22 59936 Kalispell
21 59001 Absarokee
20 59068 Red Lodge
20 59450 Highwood
20 59642 Ringling
20 59716 Bozeman
20 59248 Nashua
19 59261 Saco
19 59414 Great Falls
19 59427 Cut Bank
19 59472 Great Falls
19 59755 Virginia City
19 59860 Polson
19 59015 Billings
18 59824 Charlo
18 59916 Kalispell
18 59451 Hilger
17 59467 Pendroy
17 59486 Valier
17 59859 Plains
17 59038 Hysham
16 59353 Wibuax
16 59474 Shelby
16 59542 Turner
16 59826 Missoula
16 59403 Great Falls
15 59434 East Glacier Park
15 59847 Missoula
15 59029 Fromberg
14 59030 Corwin Springs
14 59044 Billings
14 59053 Martinsdale
14 59448 Heart Butte
14 59636 Helena
14 59719 Bozeman
14 59722 Deer Lodge
14 59069 Reed Point
13 59222 Flaxville
13 59324 Ekalaka
13 59521 Box Elder
13 59772 Bozeman
13 59036 Harlowton
12 59037 Billings
12 59347 Miles City
12 59482 Sunburst
12 59484 Sweet Grass
12 59632 Boulder
12 59643 Toston
12 59761 Wisdom
12 59853 Noxon
12 59201 Wolf Point
11 59243 Lambert
11 59255 Poplar
11 59710 Alder
11 59756 Anaconda
11 59771 Bozeman
11 59832 Drummond
11 59011 Big Timber
10 59748 Butte
10 59827 Conner
10 59868 Missoula
10 59932 Kalispell
10 59103 Billings
9 59436 Great Falls
9 59463 Great Falls
9 59721 Cardwell
9 59829 Darby
9 59851 Missoula
9 59028 Fishtail
8 59323 Colstrip
8 59433 Dutton
8 59477 Great Falls
8 59626 Helena
8 59644 Townsend
8 59875 Victor
8 59019 Columbus
7 59025 Decker
7 59061 Nye
7 59074 Ryegate
7 59420 Carter
7 59446 Geraldine
7 59631 Basin
7 59743 Butte
7 59745 Norris
7 59844 Heron
7 59904 Kalispell
7 59913 Kalispell
7 59928 Kalispell
7 59018 Corwin Springs
6 59024 Billings
6 59211 Antelope
6 59215 Circle
6 59336 Miles City
6 59338 Miles City
6 59345 Miles City
6 59351 Miles City
6 59412 Great Falls
6 59419 Bynum
6 59640 Helena
6 59802 Missoula
6 59931 Rollins
6 59020 Corwin Springs
5 59026 Edgar
5 59032 Grass Range
5 59087 Winnett
5 59221 Fairview
5 59262 Savage
5 59326 Fallon
5 59402 Malmstrom Air Force Base
5 59468 Great Falls
5 59918 Fortine
5 59922 Kalispell
5 59052 Corwin Springs
4 59086 Corwin Springs
4 59241 Hinsdale
4 59247 Medicine Lake
4 59421 Great Falls
4 59425 Conrad
4 59452 Hobson
4 59456 Ledger
4 59489 Winifred
4 59532 Chinook
4 59546 Zortman
4 59620 Helena
4 59820 Missoula
4 59845 Kalispell
4 59919 Kalispell
4 59930 Rexford
4 59002 Billings
3 59014 Bridger
3 59031 Garryowen
3 59050 Lodge Grass
3 59054 Melstone
3 59065 Corwin Springs
3 59107 Billings
3 59212 Bainville
3 59218 Culbertson
3 59259 Richey
3 59317 Broadus
3 59464 Moore
3 59465 Great Falls
3 59479 Stanford
3 59485 Great Falls
3 59527 Hays
3 59623 Helena
3 59625 Helena
3 59727 Butte
3 59825 Missoula
3 59854 Ovando
3 59866 St Regis
3 59871 Sula
3 59872 Superior
3 59934 Trego
3 59033 Greycliff
2 59039 Ingomar
2 59070 Roberts
2 59214 Brockway
2 59252 Outlook
2 59275 Westby
2 59311 Alzada
2 59344 Plevna
2 59406 Great Falls
2 59432 Dupuyer
2 59435 Ethridge
2 59442 Fort Benton
2 59443 Great Falls
2 59444 Galata
2 59471 Roy
2 59480 Great Falls
2 59487 Great Falls
2 59520 Big Sandy
2 59523 Chinook
2 59713 Avon
2 59736 Jackson
2 59740 Mcallister
2 59842 Haugen
2 59929 Proctor
2 59006 Billings
1 59046 Lavina
1 59067 Rapelje
1 59072 Roundup
1 59085 Two Dot
1 59108 Billings
1 59225 Frazer
1 59250 Opheim Afs
1 59258 Plentywood
1 59453 Judith Gap
1 59525 Gildford
1 59540 Rudyard
1 59728 Elliston
1 59749 Sheridan
1 59812 Missoula
1 59846 Missoula
1 59867 Saltese
1 59915 Elmo
1 59920 Kalispell
1 59926 Kalispell
1 59927 Kalispell
1