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WI tap water quality, city by city
493 cities and towns in WI are served by an active community water system in the EPA's records. Each page below translates that system's EPA-reported history into plain English.
According to EPA SDWIS data, retrieved October 2026.
- Abbotsford
- Abrams
- Adams
- Adell
- Albany
- Algoma
- Allenton
- Alma
- Alma Center
- Almena
- Altoona
- Amery
- Antigo
- Appleton
- Arbor Vitae
- Arena
- Argyle
- Arlington
- Ashland
- Ashwaubenon
- Athens
- Avoca
- Bagley
- Baldwin
- Balsam Lake
- Bangor
- Baraboo
- Barron
- Bay City
- Bayfield
- Bayside
- Beaver Dam
- Belgium
- Belleville
- Belmont
- Benton
- Berlin
- Birchwood
- Birnamwood
- Black Creek
- Black Earth
- Black River Falls
- Blair
- Blanchardville
- Bloomer
- Bloomington
- Blue Mounds
- Blue River
- Bonduel
- Boscobel
- Bowler
- Boyceville
- Boyd
- Brandon
- Bristol
- Brodhead
- Brookfield
- Brooklyn
- Brown Deer
- Browntown
- Browsville
- Bruce
- Burlington
- Butler
- Butternut
- Caledonia
- Cambridge
- Cameron
- Camp Douglas
- Cascade
- Cashton
- Cassville
- Cazenovia
- Cedar Grove
- Cedarburg
- Centuria
- Chaseburg
- Chetek
- Chilton
- Chippewa Falls
- Claytoon
- Clear Lake
- Cleveland
- Clinton
- Clyman
- Cobb
- Cochrane
- Coleman
- Colfax
- Colgate
- Coloma
- Columbus
- Combined Locks
- Coon Valley
- Cornell
- Cottage Grove
- Crandon
- Crivitz
- Cross Plains
- Cuba City
- Cudahy
- Cumberland
- Curtiss
- Danbury
- Dane
- Darien
- Darlington
- De Pere
- Deerfield
- Delafield
- Delavan
- Dickeyville
- Dodge
- Dodgeville
- Dorchester
- Dousman
- Downsville
- Dresser
- Drummond
- Dunbar
- Durand
- Eagle
- East Troy
- Eastman
- Eau Claire
- Edgerton
- Edmund
- Egg Harbor
- Elk Mound
- Elkhart Lake
- Elkhorn
- Ellsworth
- Elm Grove
- Elmwood
- Embarrass
- Ettrick
- Evansville
- Exeland
- Fennimore
- Fifield
- Fitchburg
- Fond Du Lac
- Footville
- Forest Junction
- Fort Atkinson
- Fountain City
- Fox Point
- Franklin
- Fredonia
- Freedom
- Friendship
- Friesland
- Galesville
- Gays Mills
- Genoa
- Genoa City
- Germantown
- Gillett
- Gilman
- Glen Flora
- Glenbeulah
- Glendale
- Glenwood City
- Glidden
- Grafton
- Grand Chute
- Granton
- Grantsburg
- Gratiot
- Green Bay
- Green Lake
- Greendale
- Greenleaf
- Greenville
- Greenwood
- Gresham
- Hager City
- Hales Corners
- Hammond
- Hancock
- Hartford
- Hartland
- Hatley
- Haugen
- Hayward
- Hazel Green
- Highbridge
- Highland
- Hilbert
- Hillsboro
- Hixton
- Hobart
- Hollandale
- Horicon
- Hortonville
- Hubertus
- Hurley
- Hustisford
- Hustler
- Independence
- Iola
- Irma
- Iron Belt
- Iron River
- Ixonia
- Jackson
- Janesville
- Jefferson
- Johnson Creek
- Juneau
- Kansasville
- Kaukauna
- Kellnersville
- Kendall
- Kennan
- Kenosha
- Keshena
- Kewaskum
- Kewaunee
- Kiel
- Kieler
- Kimberly
- King
- Knapp
- Kohler
- Kronenwetter
- La Crosse
- La Farge
- Lac Du Flambeau
- Lacrosse
- Lake Delton
- Lake Geneva
- Lake Mills
- Lake Tomahawk
- Lancaster
- Land O Lakes
- Laona
- Lavalle
- Lena
- Linden
- Livingston
- Lodi
- Loganville
- Lomira
- Lone Rock
- Lowell
- Luck
- Luxemburg
- Madison
- Maiden Rock
- Manawa
- Manitowoc
- Maplewood
- Marathon City
- Maribel
- Marinette
- Marion
- Markesan
- Marshall
- Marshfield
- Mattoon
- Mauston
- Mayville
- Mazomanie
- Mcfarland
- Mellen
- Melrose
- Menasha
- Menomonee Falls
- Menomonie
- Menomonie Falls
- Mequon
- Mercer
- Merrill
- Merrillan
- Merrimac
- Middleton
- Milladore
- Milltown
- Milton
- Milwaukee
- Mindoro
- Mineral Point
- Minocqua
- Minong
- Mishicot
- Mondovi
- Monona
- Monroe
- Montello
- Montfort
- Monticello
- Mosinee
- Mount Hope
- Mount Horeb
- Mt Horeb
- Mt Pleasant
- Mt Sterling
- Mukwonago
- Muscoda
- Muskego
- Nashotah
- Neenah
- Neillsville
- Nekoosa
- Nelson
- New Auburn
- New Berlin
- New Franken
- New Glarus
- New Holstein
- New London
- New Richmond
- Nichols
- North Fond Du Lac
- North Freedom
- North Prairie
- Northbrook
- Oak Creek
- Oakdale
- Oconomowoc
- Oconto
- Oconto Falls
- Odanah
- Onalaska
- Oneida
- Ontario
- Oostburg
- Oregon
- Orfordville
- Osceola
- Oshkosh
- Osseo
- Oxford
- Paddock Lake
- Palmyra
- Pardeeville
- Park Falls
- Patch Grove
- Pell Lake
- Pence
- Pepin
- Peshtigo
- Pewaukee
- Phelps
- Pigeon Falls
- Plain
- Plainfield
- Platteville
- Pleasant Prairie
- Plover
- Plum City
- Plymouth
- Port Edwards
- Port Washington
- Port Wing
- Portage
- Potosi
- Pound
- Poynette
- Prairie Du Chien
- Prairie Du Sac
- Prentice
- Prescott
- Princeton
- Pulaski
- Racine
- Radisson
- Randolph
- Random Lake
- Readstown
- Redgranite
- Reedsville
- Reeseville
- Rewey
- Rhinelander
- Rice Lake
- Richland Center
- Ridgeway
- Rio
- River Falls
- Roberts
- Rock Springs
- Rockland
- Salem
- Sauk City
- Saukville
- Schofield
- Seneca
- Sextonville
- Seymour
- Sharon
- Shawano
- Sheboygan
- Sheboygan Falls
- Sheldon
- Sherwood
- Shiocton
- Shorewood
- Shullsburg
- Sinsinawa
- Siren
- Sister Bay
- Slinger
- Soldiers Grove
- Somers
- Somerset
- South Milwaukee
- South Range
- South Wayne
- Sparta
- Spencer
- Spooner
- Spring Green
- Spring Valley
- St Nazianz
- Stanley
- Star Prairie
- Stetsonville
- Stevens Point
- Stitzer
- Stockbridge
- Stoddard
- Stone Lake
- Stoughton
- Strum
- Sturgeon Bay
- Sturtevant
- Suamico
- Sun Prairie
- Superior
- Suring
- Taylor
- Theresa
- Thiensville
- Thorp
- Three Lakes
- Tigerton
- Tomahawk
- Tony
- Troy Center
- Turtle Lake
- Twin Lakes
- Two Rivers
- Union Center
- Union Grove
- Valders
- Verona
- Viola
- Wabeno
- Waldo
- Wales
- Walworth
- Warrens
- Washburn
- Waterloo
- Watertown
- Waukesha
- Waunakee
- Waupun
- Wausau
- Wautoma
- Wauwatosa
- Wauzeka
- Webster
- West Allis
- West Bend
- West Salem
- Westboro
- Westby
- Westfield
- Weyauwega
- Weyerhaeuser
- Wheeler
- White Lake
- Whitehall
- Whitelaw
- Whitewater
- Wild Rose
- Williams Bay
- Wilson
- Wilton
- Windsor
- Winneconne
- Winter
- Wisconsin Dells
- Wisconsin Rapids
- Withee
- Wittenberg
- Wonewoc
- Woodville
- Wyocena
- Yuba