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IL tap water quality, city by city
1,048 cities and towns in IL 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.
- Adair
- Addison
- Albany
- Albers
- Albion
- Aledo
- Alexander
- Alexis
- Algonquin
- Alhambra
- Allendale
- Allerton
- Alma
- Alpha
- Alsip
- Altamont
- Alto Pass
- Alton
- Altona
- Alvin
- Amboy
- Anchor
- Andover
- Anna
- Annapolis
- Antioch
- Apple River
- Arcola
- Arenzville
- Argenta
- Arlington
- Arlington Heights
- Armington
- Arrowsmith
- Arthur
- Ashkum
- Ashland
- Ashley
- Ashmore
- Ashton
- Assumption
- Astoria
- Athens
- Atlanta
- Atwood
- Auburn
- Augusta
- Aurora
- Ava
- Aviston
- Bannockburn
- Bardolph
- Barrington
- Barrington
- Barry
- Bartelso
- Bartlett
- Batavia
- Batchtown
- Baylis
- Beach Park
- Beardstown
- Beaverville
- Beckemeyer
- Bedford Park
- Beecher
- Beecher City
- Belknap
- Belle Rive
- Belleville
- Bellflower
- Bellmont
- Bellwood
- Belvidere
- Bement
- Benld
- Bensenville
- Benson
- Benton
- Berkeley
- Berwyn
- Bethalto
- Bethany
- Biggsville
- Bishop Hill
- Bismarck
- Blandinsville
- Bloomingdale
- Bloomington
- Blue Island
- Bluffs
- Bluford
- Bone Gap
- Bonnie
- Bowen
- Braceville
- Bradford
- Braidwood
- Breese
- Bridgeport
- Bridgeview
- Brighton
- Brimfield
- Bristol
- Broadview
- Broadwell
- Brocton
- Brookfield
- Brookport
- Broughton
- Browning
- Brownstown
- Brussels
- Buckingham
- Buckley
- Buckner
- Buffalo
- Buffalo Grove
- Buncombe
- Bunker Hill
- Burbank
- Burlington
- Burnham
- Burnt Prairie
- Burr Ridge
- Bushnell
- Butler
- Byron
- Cabery
- Cahokia Heights
- Calhoun
- Calumet City
- Calumet Park
- Camargo
- Cambria
- Cambridge
- Camp Grove
- Camp Point
- Campbell Hill
- Campus
- Canton
- Capron
- Carbon Cliff
- Carbon Hill
- Carbondale
- Carlinville
- Carlock
- Carlyle
- Carmi
- Carol Stream
- Carpentersville
- Carrier Mills
- Carrollton
- Carterville
- Carthage
- Cary
- Casey
- Caseyville
- Catlin
- Cave In Rock
- Cave-In-Rock
- Cedaredge
- Cedarville
- Centralia
- Cerro Gordo
- Chadwick
- Champaign
- Chandlerville
- Channahon
- Chapin
- Charleston
- Chatham
- Chatsworth
- Chebanse
- Chenoa
- Cherry Valley
- Chester
- Chesterfield
- Chestnut
- Chicago
- Chicago
- Chicago Heights
- Chicago Ridge
- Chillicothe
- Chrisman
- Christopher
- Cicero
- Cisne
- Cissna Park
- Claremont
- Clarendon Hills
- Clay City
- Clayton
- Clifton
- Clinton
- Coal City
- Coal Valley
- Cobden
- Coello
- Colchester
- Colfax
- Collinsville
- Colona
- Colp
- Columbia
- Compton
- Concord
- Congerville
- Cordova
- Cornell
- Cortland
- Coulterville
- Country Club Hills
- Countryside
- Cowden
- Crainville
- Creal Springs
- Crescent City
- Crest Hill
- Creston
- Crestwood
- Crete
- Creve Coeur
- Crossville
- Crystal Lake
- Cuba
- Cullom
- Cutler
- Dahlgren
- Dakota
- Dallas City
- Dalton City
- Damiansville
- Danforth
- Danvers
- Darien
- Davis
- Davis Junction
- Dawson
- Decatur
- Deer Creek
- Deerfield
- Dekalb
- Delavan
- Depue
- Des Plaines
- Desoto
- Desplaines
- Diamond
- Dieterich
- Divernon
- Dix
- Dixmoor
- Dixon
- Dolton
- Dongola
- Donnellson
- Donovan
- Dorchester
- Dowell
- Downers Grove
- Downs
- Dundas
- Dunlap
- Dupo
- Duquoin
- Durand
- Dwight
- Eagarville
- Earlville
- East Alton
- East Carondelet
- East Dubuque
- East Dundee
- East Galesburg
- East Hazel Crest
- East Lynn
- East Moline
- East Peoria
- East St. Louis
- Easton
- Edgewood
- Edinburg
- Edwardsville
- Effingham
- El Paso
- Elburn
- Eldorado
- Eldred
- Elgin
- Elizabeth
- Elizabethtown
- Elk Grove Village
- Elkhart
- Elkville
- Elliott
- Ellis Grove
- Ellsworth
- Elmhurst
- Elmwood
- Elmwood Park
- Elvaston
- Elwood
- Emden
- Emington
- Energy
- Enfield
- Equality
- Erie
- Eureka
- Evanston
- Evansville
- Evergreen Park
- Fairbury
- Fairfield
- Fairmount
- Farina
- Farmer City
- Farmersville
- Fieldon
- Fillmore
- Findlay
- Fithian
- Flanagan
- Flat Rock
- Flora
- Flossmoor
- Ford Heights
- Forest Park
- Forest View
- Forrest
- Forreston
- Forsyth
- Fox Lake
- Fox River Grove
- Frankfort
- Franklin
- Franklin Grove
- Franklin Park
- Freeburg
- Freeman Spur
- Freeport
- Fulton
- Galatia
- Galena
- Galesburg
- Galva
- Garden Homes
- Gardner
- Geneseo
- Geneva
- Genoa
- Georgetown
- German Valley
- Germantown
- Germantown Hills
- Gibson City
- Gifford
- Gilberts
- Gillespie
- Gilman
- Girard
- Gladstone
- Glasford
- Glen Carbon
- Glen Ellyn
- Glencoe
- Glendale Heights
- Glenview
- Glenwood
- Godfrey
- Godley
- Golconda
- Golden
- Golf
- Good Hope
- Goodfield
- Goreville
- Gorham
- Grand Ridge
- Grand Tower
- Granite City
- Granville
- Grayslake
- Grayville
- Great Lakes
- Green Oaks
- Green Valley
- Greenfield
- Greenup
- Greenview
- Greenville
- Gridley
- Griggsville
- Groveland
- Gurnee
- Hamel
- Hamilton
- Hammond
- Hampshire
- Hampton
- Hanna City
- Hanover
- Hanover Park
- Hardin
- Hardwood Heights
- Harmon
- Harrisburg
- Hartford
- Hartsburg
- Harvard
- Harvel
- Harvey
- Havana
- Hawthorn Woods
- Hazel Crest
- Hebron
- Hecker
- Henderson
- Hennepin
- Henry
- Herrick
- Herrin
- Herscher
- Hettick
- Heyworth
- Hickory Hills
- Highland
- Highland Park
- Highwood
- Hillsboro
- Hillside
- Hinckley
- Hines
- Hinsdale
- Hodgkins
- Hoffman Estates
- Hollowayville
- Homer
- Hometown
- Homewood
- Hoopeston
- Hopedale
- Hopewell
- Hopkins Park
- Hudson
- Hull
- Humboldt
- Huntley
- Hurst
- Hutsonville
- Illinois City
- Illiopolis
- Ina
- Indian Head Park
- Industry
- Ingleside
- Iola
- Ipava
- Irving
- Island Lake
- Itasca
- Iuka
- Ivesdale
- Jacksonville
- Jeffersonville
- Jerseyville
- Jewett
- Johnsburg
- Johnston City
- Joliet
- Jonesboro
- Joppa
- Joy
- Justice
- Kane
- Kankakee
- Kansas
- Karnak
- Keensburg
- Keithsburg
- Kempton
- Kenilworth
- Kewanee
- Keyesport
- Kincaid
- Kinderhook
- Kingston
- Kingston Mines
- Kinmundy
- Kirkland
- Kirkwood
- Knoxville
- La Grange
- La Harpe
- La Moille
- La Prairie
- La Salle
- Lacon
- Ladd
- Lafayette
- Lagrange
- Lagrange Park
- Lake Barrington
- Lake Bluff
- Lake Forest
- Lake In The Hills
- Lake Villa
- Lake Zurich
- Lakemoor
- Lakewood
- Lanark
- Lancaster
- Langleyville
- Lansing
- Larose
- Latham
- Lawrenceville
- Lawrencville
- Leaf River
- Lebanon
- Lee
- Leland
- Lemont
- Lena
- Leroy
- Lewistown
- Lexington
- Liberty
- Libertyville
- Lincoln
- Lincolnshire
- Lincolonwood
- Linconwood
- Lindenhurst
- Lindenwood
- Lisle
- Litchfield
- Little York
- Littleton
- Loami
- Lockport
- Loda
- Logan
- Lombard
- London Mills
- Long Grove
- Longview
- Loraine
- Lostant
- Louisville
- Loves Park
- Lowpoint
- Ludlow
- Lyndon
- Lynn Center
- Lynwood
- Lyons
- Machesney Park
- Mackinaw
- Macomb
- Macon
- Maeystown
- Mahomet
- Makanda
- Malden
- Malta
- Manhattan
- Manito
- Mansfield
- Manteno
- Maple Park
- Mapleton
- Maquon
- Marengo
- Marietta
- Marine
- Marion
- Mark
- Markham
- Maroa
- Marquette Heights
- Marseilles
- Marshall
- Martinsville
- Martinton
- Maryville
- Mascoutah
- Mason City
- Matherville
- Matteson
- Mattoon
- Maywood
- Mazon
- Mc Lean
- Mcclure
- Mccook
- Mchenry
- Mcleansboro
- Mcnabb
- Media
- Melrose Park
- Melvin
- Menard
- Mendon
- Mendota
- Meredosia
- Merrionette Park
- Metamora
- Metamore
- Metcalf
- Metropolis
- Middleton
- Midlothian
- Milan
- Milford
- Mill Shoals
- Milledgeville
- Milton
- Mineral
- Minier
- Minonk
- Minooka
- Modesto
- Mokena
- Moline
- Momence
- Monee
- Monmouth
- Monroe Center
- Montgomery
- Monticello
- Mooseheart
- Moro
- Morris
- Morrison
- Morrisonville
- Morton
- Morton Grove
- Mound City
- Mounds
- Mount Erie
- Mount Prospect
- Mount Vernon
- Mount Zion
- Moweaqua
- Mt Carmel
- Mt Carroll
- Mt Vernon
- Mt. Auburn
- Mt. Morris
- Mt. Olive
- Mt. Sterling
- Mt. Vernon
- Muddy
- Mulberry Grove
- Mulkeytown
- Mundelein
- Mundelin
- Murphysboro
- Murrayville
- Naperville
- Nashville
- Nauvoo
- Nebo
- Neoga
- Neponset
- New Athens
- New Baden
- New Berlin
- New Boston
- New Burnside
- New Canton
- New Douglas
- New Haven
- New Lenox
- New Memphis
- New Minden
- New Windsor
- Newark
- Newman
- Newton
- Niles
- Noble
- Nokomis
- Normal
- Norridge
- Norris
- Norris City
- North Aurora
- North Chicago
- North Henderson
- North Lake
- North Pekin
- North Riverside
- Northbrook
- Northfield
- Norwood Park Township
- O'Fallon
- Oak Brook
- Oak Forest
- Oak Lawn
- Oak Park
- Oakbrook Terrace
- Oakford
- Oakland
- Oakwood
- Oblong
- Odell
- Odin
- Ogden
- Oglesby
- Oglesgby
- Ohio
- Okawville
- Olive Branch
- Olmsted
- Olney
- Olympia Fields
- Omaha
- Onarga
- Oneida
- Oquawka
- Orangeville
- Oregon
- Orient
- Orion
- Orland Park
- Osco
- Oswego
- Ottawa
- Palatine
- Palmer
- Palmyra
- Paloma
- Palos Heights
- Palos Hills
- Palos Park
- Pana
- Paris
- Park City
- Park Forest
- Park Ridge
- Parkersburg
- Patoka
- Patterson
- Paw Paw
- Pawnee
- Paxton
- Payson
- Pearl City
- Pecatonica
- Pekin
- Penfield
- Peoria
- Peoria Heights
- Percy
- Perry
- Peru
- Petersburg
- Phoenix
- Pierron
- Pinckneyville
- Pingree Grove
- Piper City
- Pittsburg
- Pittsfield
- Plainfield
- Plano
- Pleasant Hill
- Pleasant Plains
- Plymouth
- Pocahontas
- Polo
- Pontiac
- Poplar Grove
- Port Byron
- Posen
- Potomac
- Prairie City
- Prairie Du Rocher
- Princeton
- Princeville
- Prophetstown
- Prospect Heights
- Pulaski
- Quincy
- Raleigh
- Ramsey
- Rankin
- Rantoul
- Rapids City
- Raritan
- Raymond
- Red Bud
- Reddick
- Reynolds
- Richmond
- Richton Park
- Richview
- Ridge Farm
- Ridgway
- Rio
- Ripley
- River Forest
- River Grove
- Riverdale
- Riverside
- Riverton
- Roanoke
- Robbins
- Roberts
- Robinson
- Rochelle
- Rochester
- Rock City
- Rock Falls
- Rock Island
- Rockbridge
- Rockdale
- Rockford
- Rockton
- Rolling Meadows
- Romeoville
- Roodhouse
- Roscoe
- Roselle
- Rosemont
- Roseville
- Rossville
- Round Lake
- Round Lake Beach
- Round Lake Heights
- Round Lake Park
- Roxana
- Royal
- Royal Lakes
- Royalton
- Ruma
- Rushville
- Rutland
- Salem
- San Jose
- Sandoval
- Sandwich
- Sauk Village
- Savanna
- Sawyerville
- Saybrook
- Scales Mound
- Schaumburg
- Schiller Park
- Sciota
- Scott Air Force Base
- Seatonville
- Secor
- Seneca
- Sesser
- Seymour
- Shabbona
- Shannon
- Shawneetown
- Shelbyville
- Sheldon
- Sheridan
- Sherman
- Sherman
- Sherrard
- Shipman
- Shorewood
- Sibley
- Sidell
- Silvis
- Sims
- Skokie
- Skokie
- Sleepy Hollow
- Smithboro
- Smithfield
- Smithton
- Somonauk
- South Chicago Heights
- South Elgin
- South Holland
- South Jacksonville
- South Pekin
- South Roxana
- South Wilmington
- Sparland
- Sparta
- Speld
- Spfld
- Spring Valley
- Springerton
- Springfield
- St Anne
- St David
- St Elmo
- St Peter
- St Rose
- St. Charles
- St. Francisville
- St. Jacob
- Standard
- Stanford
- Staunton
- Steeleville
- Steward
- Stewardson
- Stickney
- Stillman Valley
- Stockton
- Stonefort
- Stonington
- Strawn
- Streamwood
- Stronghurst
- Sublette
- Sugar Grove
- Sullivan
- Summerfield
- Summit
- Sumner
- Swansea
- Sycamore
- Table Grove
- Tallula
- Tamms
- Tampico
- Taylor Ridge
- Taylor Springs
- Taylorville
- Techny
- Teutopolis
- Thawville
- Thayer
- Thebes
- Thomasboro
- Thompsonville
- Thomson
- Thornton
- Tilden
- Tinley Park
- Tiskilwa
- Toledo
- Toluca
- Tonica
- Toulon
- Tovey
- Towanda
- Tower Hill
- Tremont
- Trenton
- Troy
- Tuscola
- Ullin
- Union
- Urbana
- Ursa
- Utica
- Valier
- Valmeyer
- Van Orin
- Vandalia
- Vergennes
- Vermilion
- Vermont
- Vernon Hills
- Versailles
- Victoria
- Vienna
- Villa Park
- Viola
- Virden
- Virginia
- Volo
- Wadsworth
- Waggoner
- Walnut
- Wapella
- Warren
- Warrensburg
- Warrenville
- Warsaw
- Wasco
- Washburn
- Washington
- Wataga
- Waterloo
- Waterman
- Watseka
- Wauconda
- Waukegan
- Waverly
- Wayne City
- Waynesville
- Weldon
- Wenona
- West Brooklyn
- West Chicago
- West City
- West Dundee
- West Frankfort
- West Point
- West Salem
- West Union
- Westchester
- Western Springs
- Westfield
- Westmont
- Westville
- Wheaton
- Wheeling
- White Hall
- White Heath
- Whittington
- Williamsfield
- Williamsville
- Willisville
- Willow Hill
- Willowbrook
- Wilmette
- Wilmington
- Wilsonville
- Winchester
- Windsor
- Winfield
- Winnebago
- Winnetka
- Winthrop Harbor
- Wolf Lake
- Wonder Lake
- Wood Dale
- Wood River
- Woodhull
- Woodland
- Woodlawn
- Woodridge
- Woodstock
- Worden
- Worth
- Wyanet
- Wyoming
- Xenia
- Yates City
- Yorkville
- Zeigler
- Zion