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Water Quality in Wisconsin

Tap water contaminant reports for 887 ZIP codes across Wisconsin, based on EPA data. Select a ZIP code to see detected contaminants and how they compare to EPA legal limits and EWG health guidelines.

Abbotsford

Abrams

Adams

Adell

Afton

Albany

Algoma

Allenton

Alma

Alma Center

Almena

Almond

Altoona

Amberg

Amery

Amherst

Amherst Junction

Aniwa

Antigo

Appleton

Arcadia

Arena

Argonne

Argyle

Arkansaw

Arkdale

Arlington

Armstrong Creek

Arpin

Ashippun

Ashland

Athelstane

Athens

Auburndale

Augusta

Avalon

Avoca

Babcock

Bagley

Baileys Harbor

Baldwin

Balsam Lake

Bancroft

Bangor

Baraboo

Barneveld

Barron

Barronett

Bassett

Bay City

Bayfield

Bear Creek

Beaver Dam

Beetown

Beldenville

Belgium

Belleville

Belmont

Beloit

Benet Lake

Benoit

Benton

Berlin

Big Bend

Big Falls

Birchwood

Birnamwood

Black Creek

Black Earth

Black River Falls

Blair

Blanchardville

Blenker

Bloomer

Bloomington

Blue Mounds

Blue River

Bonduel

Boscobel

Boulder Junction

Bowler

Boyceville

Boyd

Brandon

Brantwood

Briggsville

Brillion

Bristol

Brodhead

Brokaw

Brookfield

Brooklyn

Brownsville

Browntown

Bruce

Brule

Brussels

Bryant

Burlington

Burnett

Butler

Butte Des Morts

Butternut

Cable

Cadott

Caledonia

Cambria

Cambridge

Cameron

Camp Douglas

Camp Lake

Campbellsport

Caroline

Cascade

Casco

Cashton

Cassville

Cataract

Catawba

Cazenovia

Cecil

Cedar Grove

Cedarburg

Centuria

Chaseburg

Chetek

Chili

Chilton

Chippewa Falls

Clam Lake

Clayton

Clear Lake

Cleveland

Clinton

Clintonville

Clyman

Cobb

Cochrane

Colby

Coleman

Colfax

Colgate

Collins

Coloma

Columbus

Combined Locks

Comstock

Conover

Conrath

Coon Valley

Cornell

Cornucopia

Cottage Grove

Couderay

Crandon

Crivitz

Cross Plains

Cuba City

Cudahy

Cumberland

Curtiss

Cushing

Custer

Dale

Dallas

Dalton

Danbury

Dane

Darien

Darlington

De Pere

De Soto

Deer Park

Deerbrook

Deerfield

Deforest

Delafield

Delavan

Dellwood

Denmark

Dickeyville

Dodge

Dodgeville

Dorchester

Dousman

Downing

Downsville

Doylestown

Dresser

Drummond

Dunbar

Durand

Eagle

Eagle River

East Troy

Eastman

Eau Claire

Eau Galle

Eden

Edgar

Edgerton

Edgewater

Edmund

Egg Harbor

Eland

Elcho

Elderon

Eldorado

Eleva

Elk Mound

Elkhart Lake

Elkhorn

Ellison Bay

Ellsworth

Elm Grove

Elmwood

Elroy

Elton

Embarrass

Endeavor

Ephraim

Ettrick

Eureka

Evansville

Exeland

Fairchild

Fairwater

Fall Creek

Fall River

Fence

Fennimore

Ferryville

Fifield

Fish Creek

Florence

Fond Du Lac

Fontana

Footville

Forest Junction

Forestville

Fort Atkinson

Fountain City

Fox Lake

Foxboro

Francis Creek

Franklin

Franksville

Frederic

Fredonia

Freedom

Fremont

Friendship

Friesland

Galesville

Gays Mills

Genesee Depot

Genoa

Genoa City

Germantown

Gile

Gillett

Gilman

Gilmanton

Gleason

Glen Flora

Glen Haven

Glenbeulah

Glenwood City

Glidden

Goodman

Gordon

Gotham

Grafton

Grand Marsh

Grand View

Granton

Grantsburg

Gratiot

Green Bay

Green Lake

Green Valley

Greenbush

Greendale

Greenleaf

Greenville

Greenwood

Gresham

Hager City

Hales Corners

Hammond

Hancock

Hanover

Harshaw

Hartford

Hartland

Hatley

Haugen

Hawkins

Hawthorne

Hayward

Hazel Green

Hazelhurst

Helenville

Herbster

Hertel

Hewitt

High Bridge

Highland

Hilbert

Hillpoint

Hillsboro

Hingham

Hixton

Holcombe

Hollandale

Holmen

Honey Creek

Horicon

Hortonville

Houlton

Hubertus

Hudson

Humbird

Hurley

Hustisford

Hustler

Independence

Iola

Irma

Iron Belt

Iron Ridge

Iron River

Ixonia

Jackson

Janesville

Jefferson

Jim Falls

Johnson Creek

Juda

Jump River

Junction City

Juneau

Kansasville

Kaukauna

Kellnersville

Kendall

Kennan

Kenosha

Keshena

Kewaskum

Kewaunee

Kiel

Kieler

Kimberly

King

Kingston

Knapp

Kohler

Krakow

La Crosse

La Farge

La Pointe

La Valle

Lac Du Flambeau

Ladysmith

Lake Delton

Lake Geneva

Lake Mills

Lake Nebagamon

Lake Tomahawk

Lakewood

Lancaster

Land O Lakes

Lannon

Laona

Larsen

Lebanon

Lena

Leopolis

Lime Ridge

Linden

Little Chute

Little Suamico

Livingston

Lodi

Loganville

Lomira

Lone Rock

Long Lake

Lowell

Loyal

Lublin

Luck

Luxemburg

Lyndon Station

Lynxville

Lyons

Madison

Maiden Rock

Malone

Manawa

Manitowish Waters

Manitowoc

Maple

Maplewood

Marathon

Marengo

Maribel

Marinette

Marion

Markesan

Marquette

Marshall

Marshfield

Mason

Mattoon

Mauston

Mayville

Mazomanie

Mc Farland

Medford

Mellen

Melrose

Menasha

Menomonee Falls

Menomonie

Mequon

Mercer

Merrill

Merrillan

Merrimac

Merton

Middleton

Mikana

Milladore

Millston

Milltown

Milton

Milwaukee

Mindoro

Mineral Point

Minocqua

Minong

Mishicot

Mondovi

Monroe

Montello

Montfort

Monticello

Montreal

Morrisonville

Mosinee

Mount Calvary

Mount Hope

Mount Horeb

Mount Sterling

Mountain

Mukwonago

Muscoda

Muskego

Nashotah

Necedah

Neenah

Neillsville

Nekoosa

Nelson

Nelsonville

Neopit

Neosho

Neshkoro

New Auburn

New Berlin

New Franken

New Glarus

New Holstein

New Lisbon

New London

New Munster

New Richmond

Newburg

Newton

Niagara

Nichols

North Freedom

North Lake

North Prairie

Norwalk

Oak Creek

Oakdale

Oakfield

Oconomowoc

Oconto

Oconto Falls

Odanah

Ogdensburg

Ogema

Ojibwa

Okauchee

Omro

Onalaska

Oneida

Ontario

Oostburg

Oregon

Orfordville

Osceola

Oshkosh

Osseo

Owen

Oxford

Packwaukee

Palmyra

Pardeeville

Park Falls

Patch Grove

Pearson

Pelican Lake

Pell Lake

Pembine

Pepin

Peshtigo

Pewaukee

Phelps

Phillips

Phlox

Pickerel

Pickett

Pigeon Falls

Pine River

Pittsville

Plain

Plainfield

Platteville

Pleasant Prairie

Plover

Plum City

Plymouth

Poplar

Port Edwards

Port Washington

Port Wing

Portage

Porterfield

Potosi

Potter

Pound

Powers Lake

Poy Sippi

Poynette

Prairie Du Chien

Prairie Du Sac

Prairie Farm

Prentice

Prescott

Presque Isle

Princeton

Pulaski

Racine

Radisson

Randolph

Random Lake

Readfield

Readstown

Redgranite

Reedsburg

Reedsville

Reeseville

Rewey

Rhinelander

Rib Lake

Rice Lake

Richfield

Richland Center

Ridgeland

Ridgeway

Ringle

Rio

Ripon

River Falls

Roberts

Rochester

Rock Falls

Rock Springs

Rockland

Rosendale

Rosholt

Rothschild

Rubicon

Rudolph

Saint Cloud

Saint Croix Falls

Saint Francis

Saint Germain

Saint Nazianz

Salem

Sand Creek

Sarona

Sauk City

Saukville

Saxeville

Saxon

Sayner

Scandinavia

Schofield

Seneca

Sextonville

Seymour

Sharon

Shawano

Sheboygan

Sheboygan Falls

Sheldon

Shell Lake

Sherwood

Shiocton

Shullsburg

Silver Lake

Sinsinawa

Siren

Sister Bay

Slinger

Sobieski

Soldiers Grove

Solon Springs

Somers

Somerset

South Milwaukee

South Range

South Wayne

Sparta

Spencer

Spooner

Spring Green

Spring Valley

Springbrook

Springfield

Stanley

Star Lake

Star Prairie

Stetsonville

Steuben

Stevens Point

Stitzer

Stockbridge

Stockholm

Stoddard

Stone Lake

Stoughton

Stratford

Strum

Sturgeon Bay

Sturtevant

Suamico

Sullivan

Summit Lake

Sun Prairie

Superior

Suring

Sussex

Taylor

Theresa

Thorp

Three Lakes

Tigerton

Tilleda

Tisch Mills

Tomah

Tomahawk

Tony

Townsend

Trego

Trempealeau

Trevor

Tripoli

Turtle Lake

Twin Lakes

Two Rivers

Union Center

Union Grove

Unity

Upson

Valders

Van Dyne

Verona

Vesper

Viola

Viroqua

Wabeno

Waldo

Wales

Walworth

Warrens

Wascott

Washburn

Washington Island

Waterford

Waterloo

Watertown

Waukau

Waukesha

Waunakee

Waupaca

Waupun

Wausau

Wausaukee

Wautoma

Wauzeka

Webster

West Bend

West Salem

Westboro

Westby

Westfield

Weyauwega

Weyerhaeuser

Wheeler

White Lake

Whitehall

Whitelaw

Whitewater

Wild Rose

Willard

Williams Bay

Wilmot

Wilson

Wilton

Windsor

Winnebago

Winneconne

Winter

Wisconsin Dells

Wisconsin Rapids

Withee

Wittenberg

Wonewoc

Woodford

Woodland

Woodman

Woodruff

Woodville

Wrightstown

Wyocena

Zachow

Zenda

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