Iowa Water Quality

611 ZIP codes analyzed across 590 cities. Average water quality score: 58/100 (national average: 50/100).

Cedar Rapids

6 ZIPs

A

Davenport

4 ZIPs

C

Des Moines

4 ZIPs

C

Ames

3 ZIPs

B

Dubuque

3 ZIPs

D

Iowa City

3 ZIPs

D

Ankeny

2 ZIPs

B

Sioux City

2 ZIPs

D

West Des Moines

2 ZIPs

A

Adair

1 ZIP

D

Adel

1 ZIP

C

Agency

1 ZIP

A

Ainsworth

1 ZIP

B

Akron

1 ZIP

C

Albia

1 ZIP

D

Albion

1 ZIP

D

Alburnett

1 ZIP

C

Alden

1 ZIP

B

Algona

1 ZIP

B

Allerton

1 ZIP

A

Allison

1 ZIP

A

Alta

1 ZIP

A

Alta Vista

1 ZIP

B

Alton

1 ZIP

C

Altoona

1 ZIP

D

Alvord

1 ZIP

D

Amana

1 ZIP

C

Anamosa

1 ZIP

D

Anita

1 ZIP

B

Anthon

1 ZIP

B

Aplington

1 ZIP

C

Arcadia

1 ZIP

B

Arlington

1 ZIP

A

Armstrong

1 ZIP

C

Arnolds Park

1 ZIP

A

Ashton

1 ZIP

A

Atkins

1 ZIP

D

Atlantic

1 ZIP

A

Auburn

1 ZIP

B

Audubon

1 ZIP

A

Aurelia

1 ZIP

A

Avoca

1 ZIP

B

Badger

1 ZIP

C

Bancroft

1 ZIP

B

Barnes City

1 ZIP

B

Batavia

1 ZIP

C

Battle Creek

1 ZIP

D

Baxter

1 ZIP

B

Beaman

1 ZIP

B

Bedford

1 ZIP

F

Belle Plaine

1 ZIP

C

Bellevue

1 ZIP

C

Belmond

1 ZIP

B

Bernard

1 ZIP

A

Bettendorf

1 ZIP

D

Birmingham

1 ZIP

B

Blairstown

1 ZIP

C

Blakesburg

1 ZIP

A

Blencoe

1 ZIP

C

Bloomfield

1 ZIP

F

Blue Grass

1 ZIP

D

Bondurant

1 ZIP

B

Boone

1 ZIP

F

Booneville

1 ZIP

A

Bouton

1 ZIP

B

Boyden

1 ZIP

A

Braddyville

1 ZIP

C

Brandon

1 ZIP

C

Brayton

1 ZIP

C

Breda

1 ZIP

D

Brighton

1 ZIP

C

Bristow

1 ZIP

D

Britt

1 ZIP

A

Bronson

1 ZIP

F

Brooklyn

1 ZIP

B

Buffalo

1 ZIP

B

Burlington

1 ZIP

B

Burt

1 ZIP

A

Calamus

1 ZIP

C

Calmar

1 ZIP

C

Camanche

1 ZIP

C

Cambridge

1 ZIP

B

Cantril

1 ZIP

A

Carlisle

1 ZIP

C

Carroll

1 ZIP

A

Carson

1 ZIP

C

Carter Lake

1 ZIP

C

Cascade

1 ZIP

C

Casey

1 ZIP

A

Castana

1 ZIP

F

Cedar Falls

1 ZIP

C

Center Point

1 ZIP

B

Centerville

1 ZIP

C

Central City

1 ZIP

C

Chariton

1 ZIP

F

Charles City

1 ZIP

B

Charter Oak

1 ZIP

D

Chelsea

1 ZIP

B

Cherokee

1 ZIP

A

Churdan

1 ZIP

F

Cincinnati

1 ZIP

B

Clarinda

1 ZIP

D

Clarion

1 ZIP

B

Clear Lake

1 ZIP

B

Clemons

1 ZIP

A

Clermont

1 ZIP

D

Clinton

1 ZIP

A

Clive

1 ZIP

A

Clutier

1 ZIP

C

Coggon

1 ZIP

D

Colesburg

1 ZIP

B

Colfax

1 ZIP

C

Collins

1 ZIP

C

Colo

1 ZIP

B

Columbus Junction

1 ZIP

B

Conrad

1 ZIP

B

Coon Rapids

1 ZIP

A

Coralville

1 ZIP

C

Corning

1 ZIP

F

Correctionville

1 ZIP

B

Corwith

1 ZIP

C

Corydon

1 ZIP

F

Coulter

1 ZIP

C

Council Bluffs

1 ZIP

B

Crawfordsville

1 ZIP

A

Cresco

1 ZIP

D

Creston

1 ZIP

C

Cumberland

1 ZIP

A

Dakota City

1 ZIP

B

Dallas

1 ZIP

B

Dallas Center

1 ZIP

A

Danbury

1 ZIP

D

Davis City

1 ZIP

C

Dawson

1 ZIP

D

De Soto

1 ZIP

A

De Witt

1 ZIP

D

Decorah

1 ZIP

A

Dedham

1 ZIP

D

Deep River

1 ZIP

C

Defiance

1 ZIP

F

Delhi

1 ZIP

F

Deloit

1 ZIP

C

Denison

1 ZIP

A

Denver

1 ZIP

B

Dexter

1 ZIP

B

Diagonal

1 ZIP

C

Dike

1 ZIP

A

Donnellson

1 ZIP

D

Doon

1 ZIP

F

Dow City

1 ZIP

C

Dows

1 ZIP

B

Duncombe

1 ZIP

A

Dunkerton

1 ZIP

A

Dunlap

1 ZIP

C

Durant

1 ZIP

A

Dyersville

1 ZIP

F

Dysart

1 ZIP

A

Eagle Grove

1 ZIP

A

Earlham

1 ZIP

D

Earling

1 ZIP

A

Earlville

1 ZIP

D

Early

1 ZIP

D

Edgewood

1 ZIP

A

Eldora

1 ZIP

B

Eldridge

1 ZIP

D

Elgin

1 ZIP

B

Elk Horn

1 ZIP

C

Elkader

1 ZIP

D

Elliott

1 ZIP

D

Ellsworth

1 ZIP

C

Elma

1 ZIP

C

Ely

1 ZIP

C

Emerson

1 ZIP

D

Emmetsburg

1 ZIP

A

Epworth

1 ZIP

C

Essex

1 ZIP

D

Estherville

1 ZIP

A

Evansdale

1 ZIP

B

Everly

1 ZIP

F

Exira

1 ZIP

B

Fairbank

1 ZIP

C

Fairfax

1 ZIP

B

Fairfield

1 ZIP

B

Farley

1 ZIP

C

Farmington

1 ZIP

D

Farragut

1 ZIP

A

Fayette

1 ZIP

A

Fenton

1 ZIP

A

Fertile

1 ZIP

D

Floyd

1 ZIP

D

Fonda

1 ZIP

B

Fontanelle

1 ZIP

A

Forest City

1 ZIP

B

Fort Atkinson

1 ZIP

B

Fort Dodge

1 ZIP

D

Fort Madison

1 ZIP

F

Fredericksburg

1 ZIP

C

Galva

1 ZIP

D

Garnavillo

1 ZIP

B

Garner

1 ZIP

B

Garwin

1 ZIP

A

Geneva

1 ZIP

C

George

1 ZIP

D

Gilbert

1 ZIP

D

Gilbertville

1 ZIP

C

Gilmore City

1 ZIP

F

Gladbrook

1 ZIP

B

Glenwood

1 ZIP

D

Glidden

1 ZIP

C

Goldfield

1 ZIP

A

Goodell

1 ZIP

D

Goose Lake

1 ZIP

D

Gowrie

1 ZIP

A

Graettinger

1 ZIP

A

Grafton

1 ZIP

A

Grand Junction

1 ZIP

A

Grand Mound

1 ZIP

B

Grandview

1 ZIP

C

Granger

1 ZIP

B

Granville

1 ZIP

A

Greene

1 ZIP

A

Greenfield

1 ZIP

B

Grimes

1 ZIP

A

Grinnell

1 ZIP

C

Griswold

1 ZIP

C

Grundy Center

1 ZIP

A

Guthrie Center

1 ZIP

A

Guttenberg

1 ZIP

B

Halbur

1 ZIP

B

Hamburg

1 ZIP

D

Hampton

1 ZIP

B

Hancock

1 ZIP

C

Hanlontown

1 ZIP

F

Harlan

1 ZIP

A

Hartley

1 ZIP

A

Harvey

1 ZIP

B

Hawarden

1 ZIP

D

Hawkeye

1 ZIP

B

Hazleton

1 ZIP

A

Hedrick

1 ZIP

B

Henderson

1 ZIP

C

Hiawatha

1 ZIP

F

Hills

1 ZIP

A

Hinton

1 ZIP

C

Holstein

1 ZIP

D

Holy Cross

1 ZIP

C

Hopkinton

1 ZIP

B

Hornick

1 ZIP

C

Hospers

1 ZIP

C

Hubbard

1 ZIP

C

Hudson

1 ZIP

A

Hull

1 ZIP

A

Humboldt

1 ZIP

B

Humeston

1 ZIP

C

Huxley

1 ZIP

A

Ida Grove

1 ZIP

C

Independence

1 ZIP

A

Indianola

1 ZIP

A

Inwood

1 ZIP

C

Iowa Falls

1 ZIP

B

Ireton

1 ZIP

B

Irwin

1 ZIP

C

Janesville

1 ZIP

C

Jefferson

1 ZIP

B

Jesup

1 ZIP

D

Jewell

1 ZIP

A

Johnston

1 ZIP

C

Kalona

1 ZIP

B

Kanawha

1 ZIP

A

Kellogg

1 ZIP

B

Kensett

1 ZIP

B

Keokuk

1 ZIP

B

Keosauqua

1 ZIP

B

Keota

1 ZIP

C

Keswick

1 ZIP

A

Keystone

1 ZIP

D

Kimballton

1 ZIP

D

Kingsley

1 ZIP

C

Kiron

1 ZIP

D

Klemme

1 ZIP

C

Knoxville

1 ZIP

A

La Porte City

1 ZIP

B

Lacona

1 ZIP

B

Lake City

1 ZIP

D

Lake Mills

1 ZIP

A

Lake Park

1 ZIP

B

Lake View

1 ZIP

C

Lamoni

1 ZIP

D

Lamont

1 ZIP

A

Lansing

1 ZIP

B

Larchwood

1 ZIP

C

Laurel

1 ZIP

A

Laurens

1 ZIP

A

Lawler

1 ZIP

C

Lawton

1 ZIP

B

Le Claire

1 ZIP

D

Le Grand

1 ZIP

B

Le Mars

1 ZIP

C

Leland

1 ZIP

D

Lenox

1 ZIP

B

Leon

1 ZIP

D

Lester

1 ZIP

C

Lewis

1 ZIP

C

Lidderdale

1 ZIP

D

Lineville

1 ZIP

A

Linn Grove

1 ZIP

A

Lisbon

1 ZIP

C

Little Rock

1 ZIP

A

Little Sioux

1 ZIP

C

Livermore

1 ZIP

D

Logan

1 ZIP

C

Long Grove

1 ZIP

B

Lovilia

1 ZIP

A

Lowden

1 ZIP

D

Lu Verne

1 ZIP

B

Luana

1 ZIP

B

Luxemburg

1 ZIP

A

Lynnville

1 ZIP

B

Lytton

1 ZIP

B

Macedonia

1 ZIP

C

Madrid

1 ZIP

B

Magnolia

1 ZIP

D

Malcom

1 ZIP

A

Mallard

1 ZIP

F

Manchester

1 ZIP

A

Manilla

1 ZIP

B

Manly

1 ZIP

C

Manning

1 ZIP

C

Manson

1 ZIP

F

Mapleton

1 ZIP

D

Maquoketa

1 ZIP

D

Marathon

1 ZIP

C

Marble Rock

1 ZIP

A

Marcus

1 ZIP

C

Marengo

1 ZIP

D

Marion

1 ZIP

A

Marquette

1 ZIP

C

Marshalltown

1 ZIP

C

Martensdale

1 ZIP

A

Mason City

1 ZIP

F

Massena

1 ZIP

D

Matlock

1 ZIP

A

Maurice

1 ZIP

B

Maxwell

1 ZIP

B

Maynard

1 ZIP

C

Mc Gregor

1 ZIP

A

Mechanicsville

1 ZIP

C

Mediapolis

1 ZIP

B

Melbourne

1 ZIP

A

Merrill

1 ZIP

F

Miles

1 ZIP

D

Milford

1 ZIP

D

Millersburg

1 ZIP

D

Milo

1 ZIP

D

Milton

1 ZIP

A

Mingo

1 ZIP

C

Missouri Valley

1 ZIP

D

Mitchellville

1 ZIP

B

Monmouth

1 ZIP

C

Monona

1 ZIP

A

Monroe

1 ZIP

B

Montezuma

1 ZIP

A

Monticello

1 ZIP

C

Montour

1 ZIP

A

Montrose

1 ZIP

B

Moorhead

1 ZIP

D

Moravia

1 ZIP

B

Morning Sun

1 ZIP

D

Moulton

1 ZIP

A

Mount Ayr

1 ZIP

F

Mount Pleasant

1 ZIP

D

Mount Vernon

1 ZIP

B

Moville

1 ZIP

D

Murray

1 ZIP

C

Muscatine

1 ZIP

D

Mystic

1 ZIP

B

Nashua

1 ZIP

D

Neola

1 ZIP

B

Nevada

1 ZIP

D

New Albin

1 ZIP

B

New Hampton

1 ZIP

B

New London

1 ZIP

B

New Market

1 ZIP

D

New Vienna

1 ZIP

B

New Virginia

1 ZIP

C

Newell

1 ZIP

C

Newton

1 ZIP

B

North English

1 ZIP

D

North Liberty

1 ZIP

C

Northwood

1 ZIP

B

Norwalk

1 ZIP

B

Norway

1 ZIP

C

Oakland

1 ZIP

A

Oakville

1 ZIP

D

Ocheyedan

1 ZIP

A

Odebolt

1 ZIP

C

Oelwein

1 ZIP

C

Ogden

1 ZIP

C

Okoboji

1 ZIP

B

Olds

1 ZIP

C

Onawa

1 ZIP

A

Onslow

1 ZIP

D

Orange City

1 ZIP

A

Orient

1 ZIP

C

Osage

1 ZIP

C

Osceola

1 ZIP

D

Oskaloosa

1 ZIP

D

Ossian

1 ZIP

B

Oto

1 ZIP

C

Ottumwa

1 ZIP

B

Oxford

1 ZIP

C

Oxford Junction

1 ZIP

D

Pacific Junction

1 ZIP

D

Palmer

1 ZIP

C

Palo

1 ZIP

B

Panama

1 ZIP

A

Panora

1 ZIP

F

Parkersburg

1 ZIP

A

Patterson

1 ZIP

C

Paullina

1 ZIP

B

Pella

1 ZIP

D

PEOSTA

1 ZIP

C

Perry

1 ZIP

D

Peterson

1 ZIP

A

Pierson

1 ZIP

C

Pilot Mound

1 ZIP

B

Pisgah

1 ZIP

B

Plainfield

1 ZIP

B

Pleasantville

1 ZIP

A

Plymouth

1 ZIP

D

Pocahontas

1 ZIP

C

Polk City

1 ZIP

A

Pomeroy

1 ZIP

B

Postville

1 ZIP

B

Prairie City

1 ZIP

C

Prairieburg

1 ZIP

C

Preston

1 ZIP

A

Primghar

1 ZIP

B

Princeton

1 ZIP

C

Protivin

1 ZIP

B

Quimby

1 ZIP

A

Radcliffe

1 ZIP

D

Randall

1 ZIP

A

Readlyn

1 ZIP

A

Red Oak

1 ZIP

F

Redfield

1 ZIP

C

Remsen

1 ZIP

C

Renwick

1 ZIP

D

Rhodes

1 ZIP

A

Riceville

1 ZIP

D

Ridgeway

1 ZIP

D

Ringsted

1 ZIP

A

Riverside

1 ZIP

B

Riverton

1 ZIP

D

Rock Rapids

1 ZIP

B

Rock Valley

1 ZIP

C

Rockford

1 ZIP

A

Rockwell

1 ZIP

B

Rockwell City

1 ZIP

A

Roland

1 ZIP

C

Rolfe

1 ZIP

D

Rudd

1 ZIP

C

Russell

1 ZIP

B

Ruthven

1 ZIP

A

Ryan

1 ZIP

D

Sabula

1 ZIP

C

Sac City

1 ZIP

A

Saint Ansgar

1 ZIP

C

Saint Charles

1 ZIP

D

Saint Olaf

1 ZIP

B

Salem

1 ZIP

C

Salix

1 ZIP

B

Sanborn

1 ZIP

D

Schaller

1 ZIP

B

Schleswig

1 ZIP

D

Scranton

1 ZIP

C

Sergeant Bluff

1 ZIP

A

Seymour

1 ZIP

A

Shambaugh

1 ZIP

B

Sheffield

1 ZIP

B

Shelby

1 ZIP

C

Sheldahl

1 ZIP

D

Sheldon

1 ZIP

A

Shell Rock

1 ZIP

A

Shellsburg

1 ZIP

C

Shenandoah

1 ZIP

D

Sibley

1 ZIP

A

Sidney

1 ZIP

D

Sigourney

1 ZIP

B

Sioux Center

1 ZIP

A

Sioux Rapids

1 ZIP

D

Slater

1 ZIP

C

Sloan

1 ZIP

C

Smithland

1 ZIP

B

Soldier

1 ZIP

C

Solon

1 ZIP

D

Somers

1 ZIP

C

South English

1 ZIP

C

Spencer

1 ZIP

B

Spillville

1 ZIP

A

Spirit Lake

1 ZIP

B

Springbrook

1 ZIP

C

Springville

1 ZIP

B

Stacyville

1 ZIP

B

Stanhope

1 ZIP

B

Stanwood

1 ZIP

A

State Center

1 ZIP

C

Steamboat Rock

1 ZIP

D

Storm Lake

1 ZIP

B

Story City

1 ZIP

B

Stout

1 ZIP

C

Stratford

1 ZIP

B

Strawberry Point

1 ZIP

B

Stuart

1 ZIP

C

Sully

1 ZIP

C

Sumner

1 ZIP

D

Superior

1 ZIP

C

Sutherland

1 ZIP

C

Swea City

1 ZIP

A

Swisher

1 ZIP

A

Tabor

1 ZIP

B

Tama

1 ZIP

C

Templeton

1 ZIP

A

Terril

1 ZIP

B

Thompson

1 ZIP

D

Tiffin

1 ZIP

B

Tipton

1 ZIP

D

Titonka

1 ZIP

A

Toledo

1 ZIP

C

Traer

1 ZIP

B

Treynor

1 ZIP

B

Tripoli

1 ZIP

A

Urbana

1 ZIP

C

Urbandale

1 ZIP

A

Ute

1 ZIP

C

Vail

1 ZIP

C

Van Horne

1 ZIP

C

Van Meter

1 ZIP

B

Varina

1 ZIP

B

Ventura

1 ZIP

A

Villisca

1 ZIP

B

Vincent

1 ZIP

C

Vinton

1 ZIP

B

Volga

1 ZIP

D

Wadena

1 ZIP

B

Walcott

1 ZIP

B

Walford

1 ZIP

C

Walker

1 ZIP

B

Wall Lake

1 ZIP

B

Wallingford

1 ZIP

D

Walnut

1 ZIP

B

Wapello

1 ZIP

B

Washington

1 ZIP

B

Washta

1 ZIP

A

Waterloo

1 ZIP

C

Waukee

1 ZIP

C

Waukon

1 ZIP

B

Waverly

1 ZIP

C

Wayland

1 ZIP

C

Webster City

1 ZIP

B

Wellman

1 ZIP

F

Wellsburg

1 ZIP

D

Wesley

1 ZIP

B

West Bend

1 ZIP

B

West Branch

1 ZIP

C

West Burlington

1 ZIP

C

West Chester

1 ZIP

C

West Liberty

1 ZIP

C

West Point

1 ZIP

D

West Union

1 ZIP

A

Westgate

1 ZIP

C

Westside

1 ZIP

B

Wheatland

1 ZIP

C

Whiting

1 ZIP

A

Whittemore

1 ZIP

C

Williams

1 ZIP

B

Williamsburg

1 ZIP

C

Wilton

1 ZIP

A

Winfield

1 ZIP

A

Winterset

1 ZIP

D

Winthrop

1 ZIP

D

Wiota

1 ZIP

D

Woden

1 ZIP

D

Woodbine

1 ZIP

B

Woodward

1 ZIP

C

Woolstock

1 ZIP

B

Worthington

1 ZIP

A

Wyoming

1 ZIP

C

Yale

1 ZIP

A

Zearing

1 ZIP

D