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