Wisconsin Water Quality

579 ZIP codes analyzed across 532 cities. Average water quality score: 52/100 (national average: 50/100).

Milwaukee

12 ZIPs

A

Madison

9 ZIPs

B

Racine

5 ZIPs

B

Appleton

3 ZIPs

A

La Crosse

3 ZIPs

C

Oshkosh

3 ZIPs

A

Waukesha

3 ZIPs

F

Wausau

3 ZIPs

C

Brookfield

2 ZIPs

F

Eau Claire

2 ZIPs

B

Fond Du Lac

2 ZIPs

F

Kenosha

2 ZIPs

D

Sheboygan

2 ZIPs

D

Stevens Point

2 ZIPs

D

Sun Prairie

2 ZIPs

C

Watertown

2 ZIPs

B

Wisconsin Rapids

2 ZIPs

C

Abbotsford

1 ZIP

D

Abrams

1 ZIP

B

Adams

1 ZIP

C

Adell

1 ZIP

F

Albany

1 ZIP

B

Algoma

1 ZIP

A

Allenton

1 ZIP

B

Alma

1 ZIP

B

Alma Center

1 ZIP

F

Almena

1 ZIP

D

Altoona

1 ZIP

F

Amery

1 ZIP

B

Amherst

1 ZIP

A

Antigo

1 ZIP

C

Arcadia

1 ZIP

C

Arena

1 ZIP

B

Argyle

1 ZIP

A

Arkansaw

1 ZIP

B

Arlington

1 ZIP

C

Ashland

1 ZIP

D

Athens

1 ZIP

D

Augusta

1 ZIP

F

Avoca

1 ZIP

C

Bagley

1 ZIP

B

Baldwin

1 ZIP

A

Balsam Lake

1 ZIP

B

Bangor

1 ZIP

D

Baraboo

1 ZIP

D

Barneveld

1 ZIP

B

Barron

1 ZIP

F

Bay City

1 ZIP

C

Bayfield

1 ZIP

F

Bear Creek

1 ZIP

D

Beaver Dam

1 ZIP

D

Belgium

1 ZIP

C

Belleville

1 ZIP

A

Belmont

1 ZIP

B

Beloit

1 ZIP

B

Benton

1 ZIP

C

Berlin

1 ZIP

D

Birchwood

1 ZIP

C

Birnamwood

1 ZIP

C

Black Creek

1 ZIP

A

Black Earth

1 ZIP

B

Black River Falls

1 ZIP

B

Blair

1 ZIP

F

Blanchardville

1 ZIP

C

Bloomer

1 ZIP

D

Bloomington

1 ZIP

B

Blue Mounds

1 ZIP

B

Blue River

1 ZIP

B

Bonduel

1 ZIP

B

Boscobel

1 ZIP

A

Bowler

1 ZIP

C

Boyceville

1 ZIP

C

Boyd

1 ZIP

B

Brandon

1 ZIP

B

Brillion

1 ZIP

A

Bristol

1 ZIP

C

Brodhead

1 ZIP

A

Brooklyn

1 ZIP

C

Brownsville

1 ZIP

B

Browntown

1 ZIP

D

Bruce

1 ZIP

D

Burlington

1 ZIP

D

Butler

1 ZIP

B

Butternut

1 ZIP

D

Cambria

1 ZIP

C

Cambridge

1 ZIP

F

Cameron

1 ZIP

D

Camp Douglas

1 ZIP

B

Campbellsport

1 ZIP

D

Cascade

1 ZIP

C

Cashton

1 ZIP

C

Cassville

1 ZIP

B

Cazenovia

1 ZIP

D

Cedar Grove

1 ZIP

C

Cedarburg

1 ZIP

D

Centuria

1 ZIP

A

Chaseburg

1 ZIP

A

Chetek

1 ZIP

F

Chilton

1 ZIP

A

Chippewa Falls

1 ZIP

D

Clayton

1 ZIP

A

Clear Lake

1 ZIP

C

Cleveland

1 ZIP

A

Clinton

1 ZIP

F

Clintonville

1 ZIP

F

Clyman

1 ZIP

D

Cobb

1 ZIP

D

Cochrane

1 ZIP

A

Colby

1 ZIP

A

Coleman

1 ZIP

C

Colfax

1 ZIP

C

Colgate

1 ZIP

B

Coloma

1 ZIP

B

Columbus

1 ZIP

C

Combined Locks

1 ZIP

A

Coon Valley

1 ZIP

A

Cornell

1 ZIP

C

Cottage Grove

1 ZIP

A

Crandon

1 ZIP

D

Crivitz

1 ZIP

F

Cross Plains

1 ZIP

A

Cuba City

1 ZIP

C

Cudahy

1 ZIP

C

Cumberland

1 ZIP

B

Curtiss

1 ZIP

D

Dallas

1 ZIP

F

Danbury

1 ZIP

A

Dane

1 ZIP

B

Darien

1 ZIP

D

Darlington

1 ZIP

B

De Forest

1 ZIP

A

De Pere

1 ZIP

D

Deerfield

1 ZIP

B

Delafield

1 ZIP

C

Delavan

1 ZIP

D

Denmark

1 ZIP

B

Dickeyville

1 ZIP

D

Dodge

1 ZIP

D

Dodgeville

1 ZIP

B

Dorchester

1 ZIP

A

Dousman

1 ZIP

F

Downsville

1 ZIP

B

Dresser

1 ZIP

C

Drummond

1 ZIP

F

Dunbar

1 ZIP

F

Durand

1 ZIP

A

Eagle

1 ZIP

F

Eagle River

1 ZIP

A

East Troy

1 ZIP

C

Eastman

1 ZIP

B

Edgar

1 ZIP

C

Edgerton

1 ZIP

C

Edmund

1 ZIP

C

EGG HARBOR

1 ZIP

D

Elcho

1 ZIP

D

Eleva

1 ZIP

F

Elk Mound

1 ZIP

C

Elkhart Lake

1 ZIP

A

Elkhorn

1 ZIP

D

Ellsworth

1 ZIP

B

Elm Grove

1 ZIP

D

Elmwood

1 ZIP

C

Elroy

1 ZIP

B

Embarrass

1 ZIP

F

Ettrick

1 ZIP

A

Evansville

1 ZIP

D

Exeland

1 ZIP

D

Fairchild

1 ZIP

F

Fairwater

1 ZIP

A

Fall Creek

1 ZIP

C

Fall River

1 ZIP

B

Fennimore

1 ZIP

B

Fifield

1 ZIP

D

Florence

1 ZIP

A

Fontana

1 ZIP

F

Footville

1 ZIP

B

Forest Junction

1 ZIP

C

Fort Atkinson

1 ZIP

B

Fountain City

1 ZIP

C

Fox Lake

1 ZIP

A

Franklin

1 ZIP

D

Frederic

1 ZIP

A

Fredonia

1 ZIP

B

Friendship

1 ZIP

B

Friesland

1 ZIP

D

Galesville

1 ZIP

B

Gays Mills

1 ZIP

C

Genoa City

1 ZIP

D

Germantown

1 ZIP

F

Gillett

1 ZIP

B

Gilman

1 ZIP

C

Glen Flora

1 ZIP

F

Glenbeulah

1 ZIP

D

Glenwood City

1 ZIP

A

Glidden

1 ZIP

C

Goodman

1 ZIP

D

Grafton

1 ZIP

D

Granton

1 ZIP

C

Grantsburg

1 ZIP

A

Gratiot

1 ZIP

F

GREEN BAY

1 ZIP

A

Green Lake

1 ZIP

B

Greendale

1 ZIP

A

Greenleaf

1 ZIP

B

Greenville

1 ZIP

C

Greenwood

1 ZIP

A

Gresham

1 ZIP

F

Hager City

1 ZIP

B

Hales Corners

1 ZIP

D

Hammond

1 ZIP

B

Hancock

1 ZIP

D

Hartford

1 ZIP

F

Hartland

1 ZIP

A

Hatley

1 ZIP

F

Haugen

1 ZIP

B

Hawkins

1 ZIP

A

Hayward

1 ZIP

F

Hazel Green

1 ZIP

C

High Bridge

1 ZIP

D

Highland

1 ZIP

B

Hilbert

1 ZIP

A

Hillsboro

1 ZIP

C

Hixton

1 ZIP

D

Hollandale

1 ZIP

A

Holmen

1 ZIP

F

Horicon

1 ZIP

C

Hortonville

1 ZIP

C

Hubertus

1 ZIP

C

Hudson

1 ZIP

A

Hurley

1 ZIP

C

Hustisford

1 ZIP

D

Hustler

1 ZIP

C

Independence

1 ZIP

F

Iola

1 ZIP

B

Irma

1 ZIP

B

Iron Belt

1 ZIP

D

Iron Ridge

1 ZIP

A

Iron River

1 ZIP

F

Ixonia

1 ZIP

A

Jackson

1 ZIP

A

Janesville

1 ZIP

B

JEFFERSON

1 ZIP

C

Johnson Creek

1 ZIP

D

Junction City

1 ZIP

A

Juneau

1 ZIP

B

Kansasville

1 ZIP

C

Kaukauna

1 ZIP

B

Kellnersville

1 ZIP

C

Kendall

1 ZIP

C

Kennan

1 ZIP

C

Keshena

1 ZIP

D

Kewaskum

1 ZIP

D

Kewaunee

1 ZIP

D

Kiel

1 ZIP

B

Kieler

1 ZIP

A

Kimberly

1 ZIP

C

Knapp

1 ZIP

C

Kohler

1 ZIP

B

La Farge

1 ZIP

B

La Valle

1 ZIP

D

Lac Du Flambeau

1 ZIP

A

Ladysmith

1 ZIP

D

Lake Delton

1 ZIP

A

Lake Geneva

1 ZIP

D

Lake Mills

1 ZIP

D

Lake Tomahawk

1 ZIP

F

Lancaster

1 ZIP

B

Land O Lakes

1 ZIP

F

Lannon

1 ZIP

A

Laona

1 ZIP

D

Lena

1 ZIP

B

Linden

1 ZIP

A

Little Chute

1 ZIP

D

Livingston

1 ZIP

D

Lodi

1 ZIP

B

Loganville

1 ZIP

B

Lomira

1 ZIP

F

Lone Rock

1 ZIP

C

Lowell

1 ZIP

A

Loyal

1 ZIP

B

Luck

1 ZIP

A

Luxemburg

1 ZIP

A

Lyndon Station

1 ZIP

D

Maiden Rock

1 ZIP

A

Manawa

1 ZIP

B

Manitowoc

1 ZIP

A

Maplewood

1 ZIP

B

Marathon

1 ZIP

A

Maribel

1 ZIP

A

Marinette

1 ZIP

B

Marion

1 ZIP

A

Markesan

1 ZIP

A

Marshall

1 ZIP

B

Marshfield

1 ZIP

B

Mattoon

1 ZIP

D

Mauston

1 ZIP

A

Mayville

1 ZIP

D

Mazomanie

1 ZIP

A

Mc Farland

1 ZIP

A

Medford

1 ZIP

F

Mellen

1 ZIP

A

Melrose

1 ZIP

B

Menasha

1 ZIP

A

Menomonee Falls

1 ZIP

D

Menomonie

1 ZIP

F

Mequon

1 ZIP

C

Mercer

1 ZIP

B

Merrill

1 ZIP

F

Merrillan

1 ZIP

C

Merrimac

1 ZIP

B

Middleton

1 ZIP

D

Milladore

1 ZIP

A

Milltown

1 ZIP

C

Milton

1 ZIP

C

Mindoro

1 ZIP

B

Mineral Point

1 ZIP

D

Minocqua

1 ZIP

A

Minong

1 ZIP

F

Mishicot

1 ZIP

A

Mondovi

1 ZIP

B

Monroe

1 ZIP

C

Montello

1 ZIP

B

Montfort

1 ZIP

B

Monticello

1 ZIP

A

Montreal

1 ZIP

F

Mosinee

1 ZIP

D

Mount Calvary

1 ZIP

A

Mount Hope

1 ZIP

B

Mount Horeb

1 ZIP

D

Mount Sterling

1 ZIP

C

Mukwonago

1 ZIP

F

Muscoda

1 ZIP

D

Muskego

1 ZIP

D

Nashotah

1 ZIP

D

Necedah

1 ZIP

B

Neenah

1 ZIP

A

Neillsville

1 ZIP

B

Nekoosa

1 ZIP

A

Nelson

1 ZIP

D

New Auburn

1 ZIP

D

New Berlin

1 ZIP

F

New Franken

1 ZIP

A

New Glarus

1 ZIP

D

New Holstein

1 ZIP

B

New Lisbon

1 ZIP

D

New London

1 ZIP

D

New Richmond

1 ZIP

C

Niagara

1 ZIP

A

Nichols

1 ZIP

A

North Prairie

1 ZIP

F

Norwalk

1 ZIP

B

Oak Creek

1 ZIP

D

Oakdale

1 ZIP

A

Oakfield

1 ZIP

B

Oconomowoc

1 ZIP

C

Oconto

1 ZIP

B

Oconto Falls

1 ZIP

A

Odanah

1 ZIP

F

Omro

1 ZIP

A

Onalaska

1 ZIP

B

Oneida

1 ZIP

D

Ontario

1 ZIP

C

Oostburg

1 ZIP

A

Oregon

1 ZIP

B

Orfordville

1 ZIP

B

Osceola

1 ZIP

C

Osseo

1 ZIP

A

Owen

1 ZIP

C

Oxford

1 ZIP

C

Palmyra

1 ZIP

C

Pardeeville

1 ZIP

C

Park Falls

1 ZIP

F

Patch Grove

1 ZIP

C

Pell Lake

1 ZIP

D

Pepin

1 ZIP

C

Peshtigo

1 ZIP

D

Pewaukee

1 ZIP

D

Phelps

1 ZIP

D

Phillips

1 ZIP

D

Pigeon Falls

1 ZIP

A

Pittsville

1 ZIP

D

Plain

1 ZIP

A

Plainfield

1 ZIP

B

Platteville

1 ZIP

D

Pleasant Prairie

1 ZIP

F

Plover

1 ZIP

C

Plum City

1 ZIP

A

Plymouth

1 ZIP

C

Port Edwards

1 ZIP

D

Port Washington

1 ZIP

B

Port Wing

1 ZIP

D

Portage

1 ZIP

D

Potosi

1 ZIP

D

Pound

1 ZIP

C

Poynette

1 ZIP

C

Prairie Du Chien

1 ZIP

F

Prairie Du Sac

1 ZIP

B

Prentice

1 ZIP

D

Prescott

1 ZIP

C

Princeton

1 ZIP

D

Pulaski

1 ZIP

A

Radisson

1 ZIP

D

Randolph

1 ZIP

F

Random Lake

1 ZIP

F

Readstown

1 ZIP

D

Redgranite

1 ZIP

A

Reedsburg

1 ZIP

B

Reedsville

1 ZIP

C

Reeseville

1 ZIP

F

Rewey

1 ZIP

D

Rhinelander

1 ZIP

F

Rib Lake

1 ZIP

B

Rice Lake

1 ZIP

D

Richland Center

1 ZIP

A

Ridgeway

1 ZIP

F

Rio

1 ZIP

C

Ripon

1 ZIP

A

River Falls

1 ZIP

A

Roberts

1 ZIP

A

Rock Springs

1 ZIP

B

Rockland

1 ZIP

B

Rothschild

1 ZIP

D

Saint Cloud

1 ZIP

B

Saint Croix Falls

1 ZIP

A

Saint Nazianz

1 ZIP

B

Salem

1 ZIP

C

Sauk City

1 ZIP

A

Saukville

1 ZIP

D

Schofield

1 ZIP

D

Seneca

1 ZIP

C

Sextonville

1 ZIP

C

Seymour

1 ZIP

D

Sharon

1 ZIP

F

Shawano

1 ZIP

B

Sheboygan Falls

1 ZIP

C

Sheldon

1 ZIP

F

Shell Lake

1 ZIP

D

Sherwood

1 ZIP

D

Shiocton

1 ZIP

A

Shullsburg

1 ZIP

A

Sinsinawa

1 ZIP

C

Siren

1 ZIP

C

Sister Bay

1 ZIP

A

Slinger

1 ZIP

B

Soldiers Grove

1 ZIP

C

Somers

1 ZIP

C

Somerset

1 ZIP

B

South Milwaukee

1 ZIP

D

South Range

1 ZIP

C

South Wayne

1 ZIP

D

Sparta

1 ZIP

F

Spencer

1 ZIP

B

Spooner

1 ZIP

D

Spring Green

1 ZIP

D

Spring Valley

1 ZIP

F

Stanley

1 ZIP

C

Star Prairie

1 ZIP

C

Stetsonville

1 ZIP

C

Stitzer

1 ZIP

B

Stockbridge

1 ZIP

A

Stoddard

1 ZIP

D

Stone Lake

1 ZIP

C

Stoughton

1 ZIP

A

Stratford

1 ZIP

D

Strum

1 ZIP

F

Sturgeon Bay

1 ZIP

A

Sturtevant

1 ZIP

F

Superior

1 ZIP

F

Suring

1 ZIP

C

Sussex

1 ZIP

F

Taylor

1 ZIP

D

Theresa

1 ZIP

F

Thiensville

1 ZIP

C

Thorp

1 ZIP

F

Three Lakes

1 ZIP

B

Tigerton

1 ZIP

B

Tomah

1 ZIP

D

Tomahawk

1 ZIP

B

Tony

1 ZIP

D

Trempealeau

1 ZIP

F

Turtle Lake

1 ZIP

D

Twin Lakes

1 ZIP

D

Two Rivers

1 ZIP

D

Union Center

1 ZIP

C

Union Grove

1 ZIP

D

Valders

1 ZIP

A

Verona

1 ZIP

B

Vesper

1 ZIP

A

Viola

1 ZIP

C

Viroqua

1 ZIP

B

Wabeno

1 ZIP

B

Waldo

1 ZIP

A

Wales

1 ZIP

A

Walworth

1 ZIP

C

Warrens

1 ZIP

C

Washburn

1 ZIP

B

Waterford

1 ZIP

F

Waterloo

1 ZIP

B

Waunakee

1 ZIP

D

Waupaca

1 ZIP

B

Waupun

1 ZIP

A

Wausaukee

1 ZIP

A

Wautoma

1 ZIP

C

Wauzeka

1 ZIP

B

Webster

1 ZIP

C

West Bend

1 ZIP

D

West Salem

1 ZIP

A

Westboro

1 ZIP

D

Westby

1 ZIP

D

Westfield

1 ZIP

A

Weyauwega

1 ZIP

F

Weyerhaeuser

1 ZIP

F

Wheeler

1 ZIP

F

White Lake

1 ZIP

D

Whitehall

1 ZIP

B

Whitelaw

1 ZIP

B

Whitewater

1 ZIP

D

Wild Rose

1 ZIP

F

Williams Bay

1 ZIP

D

Wilson

1 ZIP

B

Wilton

1 ZIP

B

Windsor

1 ZIP

A

Winneconne

1 ZIP

D

Winter

1 ZIP

B

Wisconsin Dells

1 ZIP

C

Withee

1 ZIP

D

Wittenberg

1 ZIP

A

Wonewoc

1 ZIP

A

Woodruff

1 ZIP

B

Woodville

1 ZIP

B

Wrightstown

1 ZIP

A

Wyocena

1 ZIP

A