Illinois: drinking water & radon

Illinois has 1,784 active community water systems. Since 2016, 437 reported health-based violations; 23 had a latest lead result above 15 ppb; 28 measured PFOA or PFOS at or above 4 ppt.

Radon zones in Illinois

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Zone 1 · highestZone 2 · moderateZone 3 · low

All ZIP codes in Illinois

1,545 ZIP codes.

60002Antioch60004Arlington Heights60005Arlington Heights60006Arlington Heights60007Elk Grove Village60008Rolling Meadows60009Elk Grove Village60010Barrington60011Barrington60012Crystal Lake60013Cary60014Crystal Lake60015Deerfield60016Des Plaines60017Des Plaines60018Des Plaines60019Des Plaines60020Fox Lake60021Fox River Grove60022Glencoe60025Glenview60026Glenview60029Golf60030Grayslake60031Gurnee60033Harvard60034Hebron60035Highland Park60038Palatine60039Crystal Lake60040Highwood60041Ingleside60042Island Lake60043Kenilworth60044Lake Bluff60045Lake Forest60046Lake Villa60047Lake Zurich60048Libertyville60050Mchenry60051Mchenry60053Morton Grove60055Palatine60056Mount Prospect60060Mundelein60061Vernon Hills60062Northbrook60064North Chicago60065Northbrook60067Palatine60068Park Ridge60069Lincolnshire60070Prospect Heights60071Richmond60072Ringwood60073Round Lake60074Palatine60075Russell60076Skokie60077Skokie60078Palatine60079Waukegan60081Spring Grove60082Techny60083Wadsworth60084Wauconda60085Waukegan60086North Chicago60087Waukegan60088Great Lakes60089Buffalo Grove60090Wheeling60091Wilmette60093Winnetka60094Palatine60095Palatine60096Winthrop Harbor60097Wonder Lake60098Woodstock60099Zion60101Addison60102Algonquin60103Bartlett60104Bellwood60105Bensenville60106Bensenville60107Streamwood60108Bloomingdale60109Burlington60110Carpentersville60111Clare60112Cortland60113Creston60115Dekalb60116Carol Stream60117Bloomingdale60118Dundee60119Elburn60120Elgin60121Elgin60122Elgin60123Elgin60124Elgin60126Elmhurst60128Carol Stream60129Esmond60130Forest Park60131Franklin Park60132Carol Stream60133Hanover Park60134Geneva60135Genoa60136Gilberts60137Glen Ellyn60138Glen Ellyn60139Glendale Heights60140Hampshire60141Hines60142Huntley60143Itasca60144Kaneville60145Kingston60146Kirkland60147Lafox60148Lombard60150Malta60151Maple Park60152Marengo60153Maywood60154Westchester60155Broadview60156Lake In The Hills60157Medinah60159Schaumburg60160Melrose Park60161Melrose Park60162Hillside60163Berkeley60164Melrose Park60165Stone Park60168Schaumburg60169Hoffman Estates60171River Grove60172Roselle60173Schaumburg60174Saint Charles60175Saint Charles60176Schiller Park60177South Elgin60178Sycamore60180Union60181Villa Park60183Wasco60184Wayne60185West Chicago60186West Chicago60187Wheaton60188Carol Stream60189Wheaton60190Winfield60191Wood Dale60192Hoffman Estates60193Schaumburg60194Schaumburg60195Schaumburg60196Schaumburg60197Carol Stream60199Carol Stream60201Evanston60202Evanston60203Evanston60204Evanston60208Evanston60302Oak Park60303Oak Park60304Oak Park60305River Forest60399Wood Dale60401Beecher60402Berwyn60403Crest Hill60404Shorewood60406Blue Island60407Braceville60408Braidwood60409Calumet City60410Channahon60411Chicago Heights60412Chicago Heights60415Chicago Ridge60416Coal City60417Crete60418Crestwood60419Dolton60420Dwight60421Elwood60422Flossmoor60423Frankfort60424Gardner60425Glenwood60426Harvey60428Markham60429Hazel Crest60430Homewood60431Joliet60432Joliet60433Joliet60434Joliet60435Joliet60436Joliet60437Kinsman60438Lansing60439Lemont60440Bolingbrook60441Lockport60442Manhattan60443Matteson60444Mazon60445Midlothian60446Romeoville60447Minooka60448Mokena60449Monee60450Morris60451New Lenox60452Oak Forest60453Oak Lawn60454Oak Lawn60455Bridgeview60456Hometown60457Hickory Hills60458Justice60459Burbank60460Odell60461Olympia Fields60462Orland Park60463Palos Heights60464Palos Park60465Palos Hills60466Park Forest60467Orland Park60468Peotone60469Posen60470Ransom60471Richton Park60472Robbins60473South Holland60474South Wilmington60475Steger60476Thornton60477Tinley Park60478Country Club Hills60479Verona60480Willow Springs60481Wilmington60482Worth60484University Park60487Tinley Park60490Bolingbrook60491Homer Glen60499Bedford Park60501Summit Argo60502Aurora60503Aurora60504Aurora60505Aurora60506Aurora60507Aurora60510Batavia60511Big Rock60512Bristol60513Brookfield60514Clarendon Hills60515Downers Grove60516Downers Grove60517Woodridge60518Earlville60519Eola60520Hinckley60521Hinsdale60522Hinsdale60523Oak Brook60525La Grange60526La Grange Park60527Willowbrook60530Lee60531Leland60532Lisle60534Lyons60537Millington60538Montgomery60539Mooseheart60540Naperville60541Newark60542North Aurora60543Oswego60544Plainfield60545Plano60546Riverside60548Sandwich60549Serena60550Shabbona60551Sheridan60552Somonauk60553Steward60554Sugar Grove60555Warrenville60556Waterman60557Wedron60558Western Springs60559Westmont60560Yorkville60561Darien60563Naperville60564Naperville60565Naperville60566Naperville60567Naperville60568Aurora60569Aurora60572Aurora60585Plainfield60586Plainfield60598Aurora60599Fox Valley60601Chicago60602Chicago60605Chicago60607Chicago60608Chicago60609Chicago60610Chicago60611Chicago60612Chicago60613Chicago60614Chicago60615Chicago60616Chicago60617Chicago60618Chicago60619Chicago60620Chicago60621Chicago60622Chicago60623Chicago60624Chicago60625Chicago60626Chicago60628Chicago60629Chicago60630Chicago60631Chicago60632Chicago60633Chicago60634Chicago60636Chicago60637Chicago60638Chicago60639Chicago60640Chicago60641Chicago60642Chicago60643Chicago60644Chicago60645Chicago60646Chicago60647Chicago60649Chicago60651Chicago60652Chicago60653Chicago60654Chicago60655Chicago60656Chicago60657Chicago60659Chicago60660Chicago60661Chicago60664Chicago60668Chicago60669Chicago60670Chicago60673Chicago60674Chicago60675Chicago60677Chicago60678Chicago60680Chicago60681Chicago60682Chicago60684Chicago60685Chicago60686Chicago60687Chicago60688Chicago60689Chicago60690Chicago60691Chicago60693Chicago60694Chicago60695Chicago60696Chicago60697Chicago60699Chicago60701Chicago60706Harwood Heights60707Elmwood Park60712Lincolnwood60714Niles60803Alsip60804Cicero60805Evergreen Park60827Riverdale60901Kankakee60910Aroma Park60911Ashkum60912Beaverville60913Bonfield60914Bourbonnais60915Bradley60917Buckingham60918Buckley60919Cabery60920Campus60921Chatsworth60922Chebanse60924Cissna Park60926Claytonville60927Clifton60928Crescent City60929Cullom60930Danforth60931Donovan60932East Lynn60933Elliott60934Emington60935Essex60936Gibson City60938Gilman60939Goodwine60940Grant Park60941Herscher60942Hoopeston60944Hopkins Park60945Iroquois60946Kempton60948Loda60949Ludlow60950Manteno60951Martinton60952Melvin60953Milford60954Momence60955Onarga60956Papineau60957Paxton60958Pembroke Township60959Piper City60960Rankin60961Reddick60962Roberts60963Rossville60964Saint Anne60966Sheldon60967Stockland60968Thawville60969Union Hill60970Watseka60973Wellington60974Woodland61001Apple River61006Ashton61007Baileyville61008Belvidere61010Byron61011Caledonia61012Capron61013Cedarville61014Chadwick61015Chana61016Cherry Valley61018Dakota61019Davis61020Davis Junction61021Dixon61024Durand61025East Dubuque61027Eleroy61028Elizabeth61030Forreston61031Franklin Grove61032Freeport61036Galena61037Galt61038Garden Prairie61039German Valley61041Hanover61042Harmon61043Holcomb61044Kent61046Lanark61047Leaf River61048Lena61049Lindenwood61050Mc Connell61051Milledgeville61052Monroe Center61053Mount Carroll61054Mount Morris61057Nachusa61059Nora61060Orangeville61061Oregon61062Pearl City61063Pecatonica61064Polo61065Poplar Grove61067Ridott61068Rochelle61070Rock City61071Rock Falls61072Rockton61073Roscoe61074Savanna61075Scales Mound61077Seward61078Shannon61079Shirland61080South Beloit61081Sterling61084Stillman Valley61085Stockton61087Warren61088Winnebago61089Winslow61091Woosung61101Rockford61102Rockford61103Rockford61104Rockford61105Rockford61106Rockford61107Rockford61108Rockford61109Rockford61110Rockford61111Loves Park61112Rockford61114Rockford61115Machesney Park61125Rockford61126Rockford61130Loves Park61131Loves Park61132Loves Park61201Rock Island61204Rock Island61230Albany61231Aledo61232Andalusia61233Andover61234Annawan61235Atkinson61236Barstow61237Buffalo Prairie61238Cambridge61239Carbon Cliff61240Coal Valley61241Colona61242Cordova61243Deer Grove61244East Moline61250Erie61251Fenton61252Fulton61254Geneseo61256Hampton61257Hillsdale61258Hooppole61259Illinois City61260Joy61261Lyndon61262Lynn Center61263Matherville61264Milan61265Moline61266Moline61270Morrison61272New Boston61273Orion61274Osco61275Port Byron61276Preemption61277Prophetstown61278Rapids City61279Reynolds61281Sherrard61282Silvis61283Tampico61284Taylor Ridge61285Thomson61299Rock Island61301La Salle61310Amboy61311Ancona61312Arlington61313Blackstone61314Buda61315Bureau61316Cedar Point61317Cherry61318Compton61319Cornell61320Dalzell61321Dana61322Depue61325Grand Ridge61326Granville61327Hennepin61328Kasbeer61329Ladd61330La Moille61331Lee Center61332Leonore61333Long Point61334Lostant61335Mc Nabb61336Magnolia61337Malden61338Manlius61340Mark61341Marseilles61342Mendota61344Mineral61345Neponset61346New Bedford61348Oglesby61349Ohio61350Ottawa61353Paw Paw61354Peru61356Princeton61358Rutland61359Seatonville61360Seneca61361Sheffield61362Spring Valley61364Streator61367Sublette61368Tiskilwa61369Toluca61370Tonica61372Troy Grove61373Utica61374Van Orin61375Varna61376Walnut61377Wenona61378West Brooklyn61379Wyanet61401Galesburg61402Galesburg61410Abingdon61411Adair61412Alexis61413Alpha61414Altona61415Avon61416Bardolph61417Berwick61418Biggsville61419Bishop Hill61420Blandinsville61421Bradford61422Bushnell61423Cameron61424Camp Grove61425Carman61426Castleton61427Cuba61428Dahinda61430East Galesburg61431Ellisville61432Fairview61433Fiatt61434Galva61435Gerlaw61436Gilson61437Gladstone61438Good Hope61439Henderson61440Industry61441Ipava61442Keithsburg61443Kewanee61447Kirkwood61448Knoxville61449La Fayette61450La Harpe61451Laura61452Littleton61453Little York61454Lomax61455Macomb61458Maquon61459Marietta61460Media61462Monmouth61465New Windsor61466North Henderson61467Oneida61468Ophiem61469Oquawka61470Prairie City61472Rio61473Roseville61474Saint Augustine61475Sciota61476Seaton61477Smithfield61478Smithshire61479Speer61480Stronghurst61482Table Grove61483Toulon61484Vermont61485Victoria61486Viola61488Wataga61489Williamsfield61490Woodhull61491Wyoming61501Astoria61516Benson61517Brimfield61519Bryant61520Canton61523Chillicothe61524Dunfermline61525Dunlap61526Edelstein61528Edwards61529Elmwood61530Eureka61531Farmington61532Forest City61533Glasford61534Green Valley61535Groveland61536Hanna City61537Henry61539Kingston Mines61540Lacon61541La Rose61542Lewistown61543Liverpool61544London Mills61545Lowpoint61546Manito61547Mapleton61548Metamora61550Morton61552Mossville61553Norris61554Pekin61555Pekin61558Pekin61559Princeville61560Putnam61561Roanoke61562Rome61563Saint David61564South Pekin61565Sparland61567Topeka61568Tremont61569Trivoli61570Washburn61571Washington61572Yates City61601Peoria61602Peoria61603Peoria61604Peoria61605Peoria61606Peoria61607Peoria61610Creve Coeur61611East Peoria61612Peoria61613Peoria61614Peoria61615Peoria61616Peoria Heights61629Peoria61630Peoria61633Peoria61634Peoria61636Peoria61637Peoria61638Peoria61639Peoria61641Peoria61643Peoria61650Peoria61651Peoria61652Peoria61653Peoria61654Peoria61655Peoria61656Peoria61701Bloomington61702Bloomington61704Bloomington61705Bloomington61709Bloomington61710Bloomington61720Anchor61721Armington61722Arrowsmith61723Atlanta61724Bellflower61725Carlock61726Chenoa61727Clinton61728Colfax61729Congerville61730Cooksville61731Cropsey61732Danvers61733Deer Creek61734Delavan61735Dewitt61736Downs61737Ellsworth61738El Paso61739Fairbury61740Flanagan61741Forrest61742Goodfield61743Graymont61744Gridley61745Heyworth61747Hopedale61748Hudson61749Kenney61751Lawndale61752Le Roy61753Lexington61754Mc Lean61755Mackinaw61756Maroa61758Merna61759Minier61760Minonk61761Normal61764Pontiac61769Saunemin61770Saybrook61771Secor61772Shirley61773Sibley61774Stanford61775Strawn61776Towanda61777Wapella61778Waynesville61791Bloomington61799Bloomington61801Urbana61802Urbana61803Urbana61810Allerton61811Alvin61812Armstrong61813Bement61814Bismarck61816Broadlands61817Catlin61818Cerro Gordo61820Champaign61821Champaign61822Champaign61824Champaign61825Champaign61826Champaign61830Cisco61831Collison61832Danville61833Tilton61834Danville61839De Land61840Dewey61841Fairmount61842Farmer City61843Fisher61844Fithian61845Foosland61846Georgetown61847Gifford61848Henning61849Homer61850Indianola61851Ivesdale61852Longview61853Mahomet61854Mansfield61855Milmine61856Monticello61857Muncie61858Oakwood61859Ogden61862Penfield61863Pesotum61864Philo61865Potomac61866Rantoul61870Ridge Farm61871Royal61872Sadorus61873Saint Joseph61874Savoy61875Seymour61876Sidell61877Sidney61878Thomasboro61880Tolono61882Weldon61883Westville61884White Heath61910Arcola61911Arthur61912Ashmore61913Atwood61914Bethany61917Brocton61919Camargo61920Charleston61924Chrisman61925Dalton City61928Gays61929Hammond61930Hindsboro61931Humboldt61932Hume61933Kansas61936La Place61937Lovington61938Mattoon61940Metcalf61941Murdock61942Newman61943Oakland61944Paris61949Redmon61951Sullivan61953Tuscola61955Vermilion61956Villa Grove61957Windsor62001Alhambra62002Alton62006Batchtown62009Benld62010Bethalto62011Bingham62012Brighton62013Brussels62014Bunker Hill62015Butler62016Carrollton62017Coffeen62018Cottage Hills62019Donnellson62021Dorsey62022Dow62023Eagarville62024East Alton62025Edwardsville62026Edwardsville62027Eldred62028Elsah62031Fieldon62032Fillmore62033Gillespie62034Glen Carbon62035Godfrey62036Golden Eagle62037Grafton62040Granite City62044Greenfield62045Hamburg62046Hamel62047Hardin62048Hartford62049Hillsboro62050Hillview62051Irving62052Jerseyville62053Kampsville62054Kane62056Litchfield62058Livingston62059Lovejoy62060Madison62061Marine62062Maryville62063Medora62067Moro62069Mount Olive62074New Douglas62075Nokomis62076Ohlman62077Panama62078Patterson62079Piasa62080Ramsey62081Rockbridge62082Roodhouse62083Rosamond62084Roxana62085Sawyerville62086Sorento62087South Roxana62088Staunton62089Taylor Springs62090Venice62091Walshville62092White Hall62093Wilsonville62094Witt62095Wood River62097Worden62098Wrights62201East Saint Louis62202East Saint Louis62203East Saint Louis62204East Saint Louis62205East Saint Louis62206East Saint Louis62207East Saint Louis62208Fairview Heights62214Addieville62215Albers62216Aviston62217Baldwin62218Bartelso62219Beckemeyer62220Belleville62221Belleville62222Belleville62223Belleville62225Scott Air Force Base62226Belleville62230Breese62231Carlyle62232Caseyville62233Chester62234Collinsville62236Columbia62237Coulterville62238Cutler62239Dupo62240East Carondelet62241Ellis Grove62242Evansville62243Freeburg62244Fults62245Germantown62246Greenville62248Hecker62249Highland62250Hoffman62252Huey62253Keyesport62254Lebanon62255Lenzburg62256Maeystown62257Marissa62258Mascoutah62259Menard62260Millstadt62261Modoc62262Mulberry Grove62263Nashville62264New Athens62265New Baden62266New Memphis62268Oakdale62269O Fallon62271Okawville62272Percy62273Pierron62274Pinckneyville62275Pocahontas62277Prairie Du Rocher62278Red Bud62279Renault62280Rockwood62281Saint Jacob62282Saint Libory62284Smithboro62285Smithton62286Sparta62288Steeleville62289Summerfield62292Tilden62293Trenton62294Troy62295Valmeyer62297Walsh62298Waterloo62301Quincy62305Quincy62306Quincy62311Augusta62312Barry62313Basco62314Baylis62316Bowen62319Camden62320Camp Point62321Carthage62323Chambersburg62324Clayton62325Coatsburg62326Colchester62329Colusa62330Dallas City62334Elvaston62336Ferris62338Fowler62339Golden62340Griggsville62341Hamilton62343Hull62344Huntsville62345Kinderhook62346La Prairie62347Liberty62348Lima62349Loraine62351Mendon62352Milton62353Mount Sterling62354Nauvoo62355Nebo62356New Canton62357New Salem62358Niota62359Paloma62360Payson62361Pearl62362Perry62363Pittsfield62365Plainville62366Pleasant Hill62367Plymouth62370Rockport62373Sutter62374Tennessee62375Timewell62376Ursa62378Versailles62379Warsaw62380West Point62401Effingham62410Allendale62411Altamont62413Annapolis62414Beecher City62417Bridgeport62418Brownstown62419Calhoun62420Casey62421Claremont62422Cowden62423Dennison62424Dieterich62425Dundas62426Edgewood62427Flat Rock62428Greenup62431Herrick62432Hidalgo62433Hutsonville62434Ingraham62436Jewett62438Lakewood62439Lawrenceville62440Lerna62441Marshall62442Martinsville62443Mason62444Mode62445Montrose62446Mount Erie62447Neoga62448Newton62449Oblong62450Olney62451Palestine62452Parkersburg62454Robinson62458Saint Elmo62459Sainte Marie62460Saint Francisville62461Shumway62462Sigel62463Stewardson62464Stoy62465Strasburg62466Sumner62467Teutopolis62468Toledo62469Trilla62471Vandalia62473Watson62474Westfield62475West Liberty62476West Salem62477West Union62478West York62479Wheeler62480Willow Hill62481Yale62501Argenta62510Assumption62512Beason62513Blue Mound62514Boody62515Buffalo62517Bulpitt62518Chestnut62519Cornland62520Dawson62521Decatur62522Decatur62523Decatur62524Decatur62525Decatur62526Decatur62530Divernon62531Edinburg62532Elwin62533Farmersville62534Findlay62535Forsyth62536Glenarm62537Harristown62538Harvel62539Illiopolis62540Kincaid62541Lake Fork62543Latham62544Macon62545Mechanicsburg62546Morrisonville62547Mount Auburn62548Mount Pulaski62549Mt Zion62550Moweaqua62551Niantic62553Oconee62554Oreana62555Owaneco62556Palmer62557Pana62558Pawnee62560Raymond62561Riverton62563Rochester62565Shelbyville62567Stonington62568Taylorville62570Tovey62571Tower Hill62572Waggoner62573Warrensburg62601Alexander62610Alsey62611Arenzville62612Ashland62613Athens62615Auburn62617Bath62618Beardstown62621Bluffs62622Bluff Springs62624Browning62625Cantrall62626Carlinville62627Chandlerville62628Chapin62629Chatham62630Chesterfield62631Concord62633Easton62634Elkhart62635Emden62638Franklin62639Frederick62640Girard62642Greenview62643Hartsburg62644Havana62649Hettick62650Jacksonville62651Jacksonville62655Kilbourne62656Lincoln62659Lincoln'S New Salem62660Literberry62661Loami62662Lowder62663Manchester62664Mason City62665Meredosia62666Middletown62667Modesto62668Murrayville62670New Berlin62671New Holland62672Nilwood62673Oakford62674Palmyra62675Petersburg62677Pleasant Plains62681Rushville62682San Jose62683Scottville62684Sherman62685Shipman62688Tallula62689Thayer62690Virden62691Virginia62692Waverly62693Williamsville62694Winchester62695Woodson62701Springfield62702Springfield62703Springfield62704Springfield62705Springfield62706Springfield62707Springfield62708Springfield62711Springfield62712Springfield62715Springfield62716Springfield62719Springfield62722Springfield62723Springfield62726Springfield62736Springfield62739Springfield62756Springfield62757Springfield62761Springfield62762Springfield62763Springfield62764Springfield62765Springfield62766Springfield62767Springfield62769Springfield62776Springfield62777Springfield62781Springfield62786Springfield62791Springfield62794Springfield62796Springfield62801Centralia62803Hoyleton62806Albion62807Alma62808Ashley62809Barnhill62810Belle Rive62811Bellmont62812Benton62814Bluford62815Bone Gap62816Bonnie62817Broughton62818Browns62819Buckner62820Burnt Prairie62821Carmi62822Christopher62823Cisne62824Clay City62825Coello62827Crossville62828Dahlgren62829Dale62830Dix62831Du Bois62832Du Quoin62833Ellery62834Emma62835Enfield62836Ewing62837Fairfield62838Farina62839Flora62840Frankfort Heights62841Freeman Spur62842Geff62843Golden Gate62844Grayville62846Ina62848Irvington62849Iuka62850Johnsonville62851Keenes62852Keensburg62853Kell62854Kinmundy62856Logan62858Louisville62859Mc Leansboro62860Macedonia62861Maunie62862Mill Shoals62863Mount Carmel62864Mount Vernon62865Mulkeytown62866Nason62867New Haven62868Noble62869Norris City62870Odin62871Omaha62872Opdyke62874Orient62875Patoka62876Radom62877Richview62878Rinard62879Sailor Springs62880Saint Peter62881Salem62882Sandoval62883Scheller62884Sesser62885Shobonier62886Sims62887Springerton62888Tamaroa62889Texico62890Thompsonville62891Valier62892Vernon62893Walnut Hill62894Waltonville62895Wayne City62896West Frankfort62897Whittington62898Woodlawn62899Xenia62901Carbondale62902Carbondale62903Carbondale62905Alto Pass62906Anna62907Ava62908Belknap62910Brookport62912Buncombe62914Cairo62915Cambria62916Campbell Hill62917Carrier Mills62918Carterville62919Cave In Rock62920Cobden62921Colp62922Creal Springs62923Cypress62924De Soto62926Dongola62927Dowell62928Eddyville62930Eldorado62931Elizabethtown62932Elkville62933Energy62934Equality62935Galatia62938Golconda62939Goreville62940Gorham62941Grand Chain62942Grand Tower62943Grantsburg62946Harrisburg62947Herod62948Herrin62949Hurst62950Jacob62951Johnston City62952Jonesboro62953Joppa62954Junction62956Karnak62957Mc Clure62958Makanda62959Marion62960Metropolis62961Millcreek62962Miller City62963Mound City62964Mounds62965Muddy62966Murphysboro62967New Burnside62969Olive Branch62970Olmsted62972Ozark62973Perks62974Pittsburg62975Pomona62976Pulaski62977Raleigh62979Ridgway62982Rosiclare62983Royalton62984Shawneetown62985Simpson62987Stonefort62988Tamms62990Thebes62992Ullin62993Unity62994Vergennes62995Vienna62996Villa Ridge62997Willisville62998Wolf Lake62999Zeigler

What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.

Questions

How many water systems in Illinois have violations?

437 of 1,784 active community water systems in Illinois reported at least one health-based violation since 2016 (EPA SDWIS).

What is the radon risk in Illinois?

793 ZIP codes are in EPA radon zone 1 (highest potential), 732 in zone 2 and 20 in zone 3. EPA recommends testing every home.