Montana Tap Water Quality
Explore tap water quality data for counties across Montana. View water system reports, track violations, monitor drinking water safety, and check fluoridation status in your community.
Total Counties
202
Communities with public water systems
Total Population
812,176
Residents served by public water systems
Water Systems
776
Public water systems statewide
Serious Violators
5
Systems with serious violations
Counties
202
With water systems
Population
812,176
Served by water systems
Water Systems
776
Total water systems
Violators
5
Systems with serious violations
Searching by your address yields the most accurate results. Searching by town or water system may not show all systems due to how the EPA categorizes data. Some towns may be listed under counties, and water system boundaries don't always align with town boundaries.
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Montana Counties
Absarokee
Population: 1,100
Water Systems: 1
Alberton
Population: 720
Water Systems: 3
Anaconda
Population: 9,133
Water Systems: 5
Antelope
Population: 59
Water Systems: 1
Ashland
Population: 1,050
Water Systems: 2
Augusta
Population: 84
Water Systems: 1
Babb
Population: 94
Water Systems: 1
Bainville
Population: 350
Water Systems: 1
Baker
Population: 2,055
Water Systems: 3
Ballantine
Population: 400
Water Systems: 1
Basin
Population: 200
Water Systems: 1
Belfry
Population: 205
Water Systems: 1
Belgrade
Population: 15,725
Water Systems: 9
Belt
Population: 720
Water Systems: 2
Big Sandy
Population: 608
Water Systems: 1
Big Sky
Population: 5,694
Water Systems: 9
Big Timber
Population: 1,760
Water Systems: 3
Bigfork
Population: 7,323
Water Systems: 7
Billings
Population: 140,849
Water Systems: 39
Black Eagle
Population: 1,783
Water Systems: 3
Bonner
Population: 251
Water Systems: 4
Boulder
Population: 1,400
Water Systems: 1
Bozeman
Population: 68,925
Water Systems: 30
Brady
Population: 144
Water Systems: 1
Bridger
Population: 800
Water Systems: 2
Broadus
Population: 450
Water Systems: 1
Broadview
Population: 314
Water Systems: 2
Butte
Population: 33,000
Water Systems: 1
Bynum
Population: 100
Water Systems: 1
Carter
Population: 228
Water Systems: 2
Cascade
Population: 650
Water Systems: 1
Charlo
Population: 450
Water Systems: 1
Chester
Population: 1,615
Water Systems: 7
Chinook
Population: 1,400
Water Systems: 2
Choteau
Population: 1,935
Water Systems: 3
Circle
Population: 644
Water Systems: 1
Clancy
Population: 1,470
Water Systems: 9
Clyde Park
Population: 300
Water Systems: 1
Colstrip
Population: 2,350
Water Systems: 1
Columbia Falls
Population: 6,409
Water Systems: 14
Columbus
Population: 2,075
Water Systems: 4
Conrad
Population: 3,616
Water Systems: 5
Cooke
Population: 300
Water Systems: 1
Coram
Population: 450
Water Systems: 1
Corvallis
Population: 313
Water Systems: 3
Corwin Springs
Population: 700
Water Systems: 5
Culbertson
Population: 3,719
Water Systems: 2
Cut Bank
Population: 3,803
Water Systems: 9
Darby
Population: 1,125
Water Systems: 2
Deer Lodge
Population: 5,000
Water Systems: 2
Denton
Population: 255
Water Systems: 1
Dillon
Population: 5,240
Water Systems: 7
Dodson
Population: 120
Water Systems: 1
Dutton
Population: 338
Water Systems: 1
East Helena
Population: 2,907
Water Systems: 10
Ekalaka
Population: 400
Water Systems: 1
Emigrant
Population: 135
Water Systems: 1
Ennis
Population: 1,595
Water Systems: 2
Eureka
Population: 2,625
Water Systems: 5
Fairfield
Population: 1,188
Water Systems: 2
Fairview
Population: 1,000
Water Systems: 1
Flathead
Population: 30
Water Systems: 1
Flaxville
Population: 82
Water Systems: 1
Florence
Population: 110
Water Systems: 2
Forsyth
Population: 2,260
Water Systems: 1
Fort Benton
Population: 1,550
Water Systems: 2
Fort Harrison
Population: 1,275
Water Systems: 1
Fort Peck
Population: 903
Water Systems: 2
Fort Smith
Population: 450
Water Systems: 1
Fortine
Population: 34
Water Systems: 1
Frenchtown
Population: 2,138
Water Systems: 8
Froid
Population: 450
Water Systems: 1
Fromberg
Population: 500
Water Systems: 1
Galata
Population: 200
Water Systems: 1
Gallatin
Population: 50
Water Systems: 1
Gardiner
Population: 700
Water Systems: 1
Geraldine
Population: 310
Water Systems: 2
Geyser
Population: 125
Water Systems: 1
Gildford
Population: 150
Water Systems: 2
Glasgow
Population: 3,433
Water Systems: 2
Glendive
Population: 7,866
Water Systems: 9
Grass Range
Population: 154
Water Systems: 2
Great Falls
Population: 75,754
Water Systems: 26
Hamilton
Population: 6,598
Water Systems: 13
Hardin
Population: 3,675
Water Systems: 3
Harlem
Population: 862
Water Systems: 2
Harlowton
Population: 2,346
Water Systems: 4
Haugan
Population: 70
Water Systems: 1
Havre
Population: 12,273
Water Systems: 8
Helena
Population: 74,760
Water Systems: 45
Heron
Population: 119
Water Systems: 2
Highwood
Population: 360
Water Systems: 2
Hinsdale
Population: 250
Water Systems: 1
Hobson
Population: 125
Water Systems: 1
Hot Springs
Population: 600
Water Systems: 1
Hungry Horse
Population: 1,135
Water Systems: 1
Huntley
Population: 755
Water Systems: 2
Hysham
Population: 262
Water Systems: 1
Jackson
Population: 58
Water Systems: 1
Joliet
Population: 600
Water Systems: 1
Jordan
Population: 364
Water Systems: 1
Judith Gap
Population: 126
Water Systems: 1
Kalispell
Population: 36,500
Water Systems: 80
Kevin
Population: 290
Water Systems: 1
Lakeside
Population: 2,115
Water Systems: 8
Lambert
Population: 150
Water Systems: 1
Laurel
Population: 7,009
Water Systems: 6
Ledger
Population: 95
Water Systems: 1
Lewistown
Population: 6,398
Water Systems: 5
Libby
Population: 5,153
Water Systems: 6
Lima
Population: 279
Water Systems: 1
Livingston
Population: 7,959
Water Systems: 7
Lodge Grass
Population: 480
Water Systems: 1
Lolo
Population: 3,772
Water Systems: 6
Loma
Population: 200
Water Systems: 1
Loring
Population: 45
Water Systems: 1
Malta
Population: 1,847
Water Systems: 2
Manhattan
Population: 2,468
Water Systems: 8
Marion
Population: 270
Water Systems: 4
Martin
Population: 340
Water Systems: 1
Martinsdale
Population: 225
Water Systems: 2
Medicine Lake
Population: 600
Water Systems: 1
Melstone
Population: 170
Water Systems: 1
Miles City
Population: 10,288
Water Systems: 4
Milltown
Population: 105
Water Systems: 1
Missoula
Population: 77,904
Water Systems: 66
Moore
Population: 186
Water Systems: 1
Musselshell
Population: 75
Water Systems: 1
Nashua
Population: 300
Water Systems: 1
Neihart
Population: 229
Water Systems: 1
Noxon
Population: 373
Water Systems: 2
Opheim
Population: 111
Water Systems: 1
Outlook
Population: 96
Water Systems: 1
Pablo
Population: 2,175
Water Systems: 1
Paradise
Population: 276
Water Systems: 2
Pendroy
Population: 92
Water Systems: 1
Philipsburg
Population: 1,360
Water Systems: 1
Pinesdale
Population: 800
Water Systems: 1
Plains
Population: 1,700
Water Systems: 1
Plentywood
Population: 1,700
Water Systems: 1
Plevna
Population: 130
Water Systems: 1
Polson
Population: 6,433
Water Systems: 11
Power
Population: 256
Water Systems: 2
Ramsay
Population: 97
Water Systems: 1
Rapelje
Population: 70
Water Systems: 1
Red Lodge
Population: 2,200
Water Systems: 2
Rexford
Population: 160
Water Systems: 1
Richey
Population: 180
Water Systems: 1
Roberts
Population: 300
Water Systems: 1
Rollins
Population: 56
Water Systems: 1
Ronan
Population: 3,361
Water Systems: 5
Roundup
Population: 1,900
Water Systems: 1
Roy
Population: 110
Water Systems: 1
Rudyard
Population: 75
Water Systems: 1
Ryegate
Population: 355
Water Systems: 2
Saco
Population: 180
Water Systems: 1
Saint Ignatius
Population: 765
Water Systems: 2
Saint Marie
Population: 450
Water Systems: 1
Saint Regis
Population: 250
Water Systems: 4
Sand Coulee
Population: 590
Water Systems: 4
Santa Rita
Population: 628
Water Systems: 2
Scobey
Population: 1,026
Water Systems: 1
Seeley Lake
Population: 1,575
Water Systems: 1
Shelby
Population: 4,715
Water Systems: 5
Shepherd
Population: 100
Water Systems: 1
Sheridan
Population: 632
Water Systems: 1
Sidney
Population: 5,495
Water Systems: 4
Somers
Population: 1,134
Water Systems: 3
Stanford
Population: 505
Water Systems: 2
Stevensville
Population: 2,320
Water Systems: 3
Stockett
Population: 310
Water Systems: 2
Sun River
Population: 630
Water Systems: 2
Sunburst
Population: 658
Water Systems: 3
Superior
Population: 1,100
Water Systems: 1
Sweetgrass
Population: 200
Water Systems: 2
Thompson Falls
Population: 2,345
Water Systems: 4
Three Forks
Population: 1,900
Water Systems: 1
Toole
Population: 90
Water Systems: 1
Townsend
Population: 2,150
Water Systems: 2
Trout Creek
Population: 350
Water Systems: 1
Troy
Population: 2,508
Water Systems: 4
Turner
Population: 50
Water Systems: 1
Twin Bridges
Population: 424
Water Systems: 1
Two Dot
Population: 50
Water Systems: 1
Ulm
Population: 105
Water Systems: 1
Valier
Population: 804
Water Systems: 4
Vaughn
Population: 665
Water Systems: 2
Virginia
Population: 1,500
Water Systems: 1
Warm Springs
Population: 721
Water Systems: 1
West Glacier
Population: 1,020
Water Systems: 3
West Yellowstone
Population: 10,239
Water Systems: 4
Westby
Population: 172
Water Systems: 1
White Sulphur Springs
Population: 1,087
Water Systems: 2
Whitefish
Population: 15,955
Water Systems: 19
Whitehall
Population: 1,500
Water Systems: 1
Wibaux
Population: 550
Water Systems: 1
Wilsall
Population: 250
Water Systems: 1
Winifred
Population: 274
Water Systems: 1
Winnett
Population: 187
Water Systems: 1
Wolf Creek
Population: 67
Water Systems: 1
Worden
Population: 400
Water Systems: 1
Zortman
Population: 219
Water Systems: 2