Ohio: drinking water & radon

Ohio has 1,085 active community water systems. Since 2016, 274 reported health-based violations; 2 had a latest lead result above 15 ppb; 58 measured PFOA or PFOS at or above 4 ppt.

Radon zones in Ohio

tap a county

Zone 1 · highestZone 2 · moderateZone 3 · low

All ZIP codes in Ohio

1,391 ZIP codes.

43001Alexandria43002Amlin43003Ashley43004Blacklick43005Bladensburg43006Brinkhaven43007Broadway43008Buckeye Lake43009Cable43010Catawba43011Centerburg43013Croton43014Danville43015Delaware43016Dublin43017Dublin43018Etna43019Fredericktown43021Galena43022Gambier43023Granville43025Hebron43026Hilliard43027Homer43028Howard43029Irwin43030Jacksontown43031Johnstown43032Kilbourne43033Kirkersville43035Lewis Center43037Martinsburg43040Marysville43041Marysville43044Mechanicsburg43045Milford Center43046Millersport43048Mount Liberty43050Mount Vernon43054New Albany43055Newark43056Heath43058Newark43060North Lewisburg43061Ostrander43062Pataskala43064Plain City43065Powell43066Radnor43067Raymond43068Reynoldsburg43069Reynoldsburg43070Rosewood43071Saint Louisville43072Saint Paris43073Summit Station43074Sunbury43076Thornville43077Unionville Center43078Urbana43080Utica43081Westerville43082Westerville43083Westville43084Woodstock43085Columbus43086Westerville43093Newark43101Adelphi43102Amanda43103Ashville43105Baltimore43106Bloomingburg43107Bremen43109Brice43110Canal Winchester43111Carbon Hill43112Carroll43113Circleville43115Clarksburg43116Commercial Point43117Derby43119Galloway43123Grove City43125Groveport43127Haydenville43128Jeffersonville43130Lancaster43135Laurelville43136Lithopolis43137Lockbourne43138Logan43140London43142Milledgeville43143Mount Sterling43144Murray City43145New Holland43146Orient43147Pickerington43148Pleasantville43149Rockbridge43150Rushville43151Sedalia43152South Bloomingville43153South Solon43154Stoutsville43155Sugar Grove43157Thurston43158Union Furnace43160Washington Court House43162West Jefferson43164Williamsport43194Lockbourne43195Groveport43199Groveport43201Columbus43202Columbus43203Columbus43204Columbus43205Columbus43206Columbus43207Columbus43209Columbus43210Columbus43211Columbus43212Columbus43213Columbus43214Columbus43215Columbus43216Columbus43217Columbus43218Columbus43219Columbus43220Columbus43221Columbus43222Columbus43223Columbus43224Columbus43226Columbus43227Columbus43228Columbus43229Columbus43230Columbus43231Columbus43232Columbus43234Columbus43235Columbus43236Columbus43240Columbus43251Columbus43260Columbus43266Columbus43268Columbus43270Columbus43271Columbus43272Columbus43279Columbus43287Columbus43291Columbus43301Marion43302Marion43310Belle Center43311Bellefontaine43314Caledonia43315Cardington43316Carey43317Chesterville43318De Graff43319East Liberty43320Edison43322Green Camp43323Harpster43324Huntsville43325Iberia43326Kenton43330Kirby43331Lakeview43332La Rue43333Lewistown43334Marengo43335Martel43336Middleburg43337Morral43338Mount Gilead43340Mount Victory43341New Bloomington43342Prospect43343Quincy43344Richwood43345Ridgeway43346Roundhead43347Rushsylvania43348Russells Point43349Shauck43351Upper Sandusky43356Waldo43357West Liberty43358West Mansfield43359Wharton43360Zanesfield43402Bowling Green43403Bowling Green43406Bradner43407Burgoon43408Clay Center43410Clyde43412Curtice43413Cygnet43414Dunbridge43416Elmore43420Fremont43430Genoa43431Gibsonburg43432Graytown43433Gypsum43435Helena43436Isle Saint George43437Jerry City43438Kelleys Island43440Lakeside Marblehead43441Lemoyne43442Lindsey43443Luckey43445Martin43446Middle Bass43447Millbury43449Oak Harbor43450Pemberville43451Portage43452Port Clinton43456Put In Bay43457Risingsun43458Rocky Ridge43460Rossford43462Rudolph43463Stony Ridge43464Vickery43465Walbridge43466Wayne43467West Millgrove43468Williston43469Woodville43501Alvordton43502Archbold43504Berkey43505Blakeslee43506Bryan43510Colton43511Custar43512Defiance43515Delta43516Deshler43517Edgerton43518Edon43519Evansport43520Farmer43521Fayette43522Grand Rapids43523Grelton43524Hamler43525Haskins43526Hicksville43527Holgate43528Holland43529Hoytville43530Jewell43531Kunkle43532Liberty Center43533Lyons43534Mc Clure43535Malinta43536Mark Center43537Maumee43540Metamora43541Milton Center43542Monclova43543Montpelier43545Napoleon43547Neapolis43548New Bavaria43549Ney43550Okolona43551Perrysburg43552Perrysburg43553Pettisville43554Pioneer43555Ridgeville Corners43556Sherwood43557Stryker43558Swanton43560Sylvania43565Tontogany43566Waterville43567Wauseon43569Weston43570West Unity43571Whitehouse43601Toledo43603Toledo43604Toledo43605Toledo43606Toledo43607Toledo43608Toledo43609Toledo43610Toledo43611Toledo43612Toledo43613Toledo43614Toledo43615Toledo43616Oregon43617Toledo43619Northwood43620Toledo43623Toledo43635Toledo43652Toledo43654Toledo43656Toledo43657Toledo43659Toledo43660Toledo43661Toledo43666Toledo43667Toledo43681Toledo43682Toledo43697Toledo43699Toledo43701Zanesville43702Zanesville43711Ava43713Barnesville43716Beallsville43717Belle Valley43718Belmont43719Bethesda43720Blue Rock43721Brownsville43722Buffalo43723Byesville43724Caldwell43725Cambridge43727Chandlersville43728Chesterhill43730Corning43731Crooksville43732Cumberland43733Derwent43734Duncan Falls43735East Fultonham43736Fairview43738Fultonham43739Glenford43740Gratiot43746Hopewell43747Jerusalem43748Junction City43749Kimbolton43750Kipling43752Laings43754Lewisville43755Lore City43756Mcconnelsville43758Malta43759Morristown43760Mount Perry43761Moxahala43762New Concord43764New Lexington43766New Straitsville43767Norwich43768Old Washington43771Philo43772Pleasant City43773Quaker City43777Roseville43778Salesville43779Sarahsville43780Senecaville43782Shawnee43783Somerset43786Stafford43787Stockport43788Summerfield43793Woodsfield43802Adamsville43803Bakersville43804Baltic43805Blissfield43811Conesville43812Coshocton43821Dresden43822Frazeysburg43824Fresno43828Keene43830Nashport43832Newcomerstown43836Plainfield43837Port Washington43840Stone Creek43843Walhonding43844Warsaw43845West Lafayette43901Adena43902Alledonia43903Amsterdam43905Barton43906Bellaire43907Cadiz43908Bergholz43909Blaine43910Bloomingdale43912Bridgeport43913Brilliant43914Cameron43915Clarington43916Colerain43917Dillonvale43920East Liverpool43925East Springfield43926Empire43927Fairpoint43928Glencoe43930Hammondsville43931Hannibal43932Irondale43933Jacobsburg43934Lansing43935Martins Ferry43937Maynard43938Mingo Junction43939Mount Pleasant43940Neffs43941Piney Fork43942Powhatan Point43943Rayland43944Richmond43945Salineville43946Sardis43947Shadyside43948Smithfield43950Saint Clairsville43951Lafferty43952Steubenville43953Steubenville43961Stratton43962Summitville43963Tiltonsville43964Toronto43967Warnock43968Wellsville43970Wolf Run43971Yorkville43972Bannock43973Freeport43974Harrisville43976Hopedale43977Flushing43981New Athens43983Piedmont43984New Rumley43985Holloway43986Jewett43988Scio44001Amherst44003Andover44004Ashtabula44005Ashtabula44010Austinburg44011Avon44012Avon Lake44017Berea44021Burton44022Chagrin Falls44023Chagrin Falls44024Chardon44026Chesterland44028Columbia Station44030Conneaut44032Dorset44033East Claridon44035Elyria44036Elyria44039North Ridgeville44040Gates Mills44041Geneva44044Grafton44045Grand River44046Huntsburg44047Jefferson44048Kingsville44049Kipton44050Lagrange44052Lorain44053Lorain44054Sheffield Lake44055Lorain44056Macedonia44057Madison44060Mentor44061Mentor44062Middlefield44064Montville44065Newbury44067Northfield44068North Kingsville44070North Olmsted44072Novelty44073Novelty44074Oberlin44076Orwell44077Painesville44080Parkman44081Perry44082Pierpont44084Rock Creek44085Rome44086Thompson44087Twinsburg44088Unionville44089Vermilion44090Wellington44092Wickliffe44093Williamsfield44094Willoughby44095Eastlake44096Willoughby44097Eastlake44099Windsor44101Cleveland44102Cleveland44103Cleveland44104Cleveland44105Cleveland44106Cleveland44107Lakewood44108Cleveland44109Cleveland44110Cleveland44111Cleveland44112Cleveland44113Cleveland44114Cleveland44115Cleveland44116Rocky River44117Euclid44118Cleveland44119Cleveland44120Cleveland44121Cleveland44122Beachwood44123Euclid44124Cleveland44125Cleveland44126Cleveland44127Cleveland44128Cleveland44129Cleveland44130Cleveland44131Independence44132Euclid44133North Royalton44134Cleveland44135Cleveland44136Strongsville44137Maple Heights44138Olmsted Falls44139Solon44140Bay Village44141Brecksville44142Brookpark44143Cleveland44144Cleveland44145Westlake44146Bedford44147Broadview Heights44149Strongsville44181Cleveland44188Cleveland44190Cleveland44191Cleveland44192Cleveland44193Cleveland44194Cleveland44195Cleveland44197Cleveland44198Cleveland44199Cleveland44201Atwater44202Aurora44203Barberton44210Bath44211Brady Lake44212Brunswick44214Burbank44215Chippewa Lake44216Clinton44217Creston44221Cuyahoga Falls44222Cuyahoga Falls44223Cuyahoga Falls44224Stow44230Doylestown44231Garrettsville44232Green44233Hinckley44234Hiram44235Homerville44236Hudson44237Hudson44240Kent44241Streetsboro44242Kent44243Kent44250Lakemore44251Westfield Center44253Litchfield44254Lodi44255Mantua44256Medina44258Medina44260Mogadore44262Munroe Falls44264Peninsula44265Randolph44266Ravenna44270Rittman44272Rootstown44273Seville44274Sharon Center44275Spencer44276Sterling44278Tallmadge44280Valley City44281Wadsworth44282Wadsworth44285Wayland44286Richfield44287West Salem44288Windham44301Akron44302Akron44303Akron44304Akron44305Akron44306Akron44307Akron44308Akron44309Akron44310Akron44311Akron44312Akron44313Akron44314Akron44315Akron44316Akron44317Akron44319Akron44320Akron44321Akron44325Akron44326Akron44328Akron44333Akron44334Fairlawn44372Akron44396Akron44398Akron44401Berlin Center44402Bristolville44403Brookfield44404Burghill44405Campbell44406Canfield44408Columbiana44410Cortland44411Deerfield44412Diamond44413East Palestine44415Elkton44416Ellsworth44417Farmdale44418Fowler44420Girard44422Greenford44423Hanoverton44424Hartford44425Hubbard44427Kensington44428Kinsman44429Lake Milton44430Leavittsburg44431Leetonia44432Lisbon44436Lowellville44437Mc Donald44438Masury44439Mesopotamia44440Mineral Ridge44441Negley44442New Middletown44443New Springfield44444Newton Falls44445New Waterford44446Niles44449North Benton44450North Bloomfield44451North Jackson44452North Lima44453Orangeville44454Petersburg44455Rogers44460Salem44470Southington44471Struthers44473Vienna44481Warren44482Warren44483Warren44484Warren44485Warren44486Warren44490Washingtonville44491West Farmington44492West Point44493Winona44501Youngstown44502Youngstown44503Youngstown44504Youngstown44505Youngstown44506Youngstown44507Youngstown44509Youngstown44510Youngstown44511Youngstown44512Youngstown44513Youngstown44514Youngstown44515Youngstown44555Youngstown44601Alliance44606Apple Creek44607Augusta44608Beach City44609Beloit44610Berlin44611Big Prairie44612Bolivar44613Brewster44614Canal Fulton44615Carrollton44617Charm44618Dalton44619Damascus44620Dellroy44621Dennison44622Dover44624Dundee44625East Rochester44626East Sparta44627Fredericksburg44628Glenmont44629Gnadenhutten44630Greentown44632Hartville44633Holmesville44634Homeworth44636Kidron44637Killbuck44638Lakeville44639Leesville44640Limaville44641Louisville44643Magnolia44644Malvern44645Marshallville44646Massillon44647Massillon44648Massillon44650Maximo44651Mechanicstown44652Middlebranch44653Midvale44654Millersburg44656Mineral City44657Minerva44660Mount Hope44661Nashville44662Navarre44663New Philadelphia44665North Georgetown44666North Lawrence44667Orrville44669Paris44671Sandyville44672Sebring44675Sherrodsville44676Shreve44677Smithville44678Somerdale44679Stillwater44680Strasburg44681Sugarcreek44682Tuscarawas44683Uhrichsville44685Uniontown44687Walnut Creek44688Waynesburg44689Wilmot44690Winesburg44691Wooster44693Deersville44695Bowerston44697Zoar44699Tippecanoe44701Canton44702Canton44703Canton44704Canton44705Canton44706Canton44707Canton44708Canton44709Canton44710Canton44711Canton44714Canton44718Canton44720North Canton44721Canton44730East Canton44735Canton44750Canton44767Canton44799Canton44802Alvada44804Arcadia44805Ashland44807Attica44809Bascom44811Bellevue44813Bellville44814Berlin Heights44815Bettsville44816Birmingham44817Bloomdale44818Bloomville44820Bucyrus44822Butler44824Castalia44826Collins44827Crestline44828Flat Rock44830Fostoria44833Galion44836Green Springs44837Greenwich44838Hayesville44839Huron44840Jeromesville44841Kansas44842Loudonville44843Lucas44844Mc Cutchenville44845Melmore44846Milan44847Monroeville44848Nankin44849Nevada44850New Haven44851New London44853New Riegel44854New Washington44855North Fairfield44856North Robinson44857Norwalk44859Nova44860Oceola44862Ontario44864Perrysville44865Plymouth44866Polk44867Republic44870Sandusky44871Sandusky44874Savannah44875Shelby44878Shiloh44880Sullivan44881Sulphur Springs44882Sycamore44883Tiffin44887Tiro44888Willard44889Wakeman44890Willard44901Mansfield44902Mansfield44903Mansfield44904Mansfield44905Mansfield44906Mansfield44907Mansfield45001Addyston45002Cleves45003College Corner45004Collinsville45005Franklin45011Hamilton45012Hamilton45013Hamilton45014Fairfield45015Hamilton45018Fairfield45030Harrison45032Harveysburg45033Hooven45034Kings Mills45036Lebanon45039Maineville45040Mason45041Miamitown45042Middletown45044Middletown45050Monroe45051Mount Saint Joseph45052North Bend45053Okeana45054Oregonia45055Overpeck45056Oxford45061Ross45062Seven Mile45063Shandon45064Somerville45065South Lebanon45066Springboro45067Trenton45068Waynesville45069West Chester45070West Elkton45071West Chester45101Aberdeen45102Amelia45103Batavia45105Bentonville45106Bethel45107Blanchester45111Camp Dennison45112Chilo45113Clarksville45114Cuba45115Decatur45118Fayetteville45119Feesburg45120Felicity45121Georgetown45122Goshen45123Greenfield45130Hamersville45131Higginsport45132Highland45133Hillsboro45135Leesburg45140Loveland45142Lynchburg45144Manchester45146Martinsville45147Miamiville45148Midland45150Milford45152Morrow45153Moscow45154Mount Orab45155Mowrystown45156Neville45157New Richmond45158Newtonsville45159New Vienna45160Owensville45162Pleasant Plain45166Reesville45167Ripley45168Russellville45169Sabina45171Sardinia45172Sinking Spring45174Terrace Park45176Williamsburg45177Wilmington45201Cincinnati45202Cincinnati45203Cincinnati45204Cincinnati45205Cincinnati45206Cincinnati45207Cincinnati45208Cincinnati45209Cincinnati45211Cincinnati45212Cincinnati45213Cincinnati45214Cincinnati45215Cincinnati45216Cincinnati45217Cincinnati45218Cincinnati45219Cincinnati45220Cincinnati45221Cincinnati45222Cincinnati45223Cincinnati45224Cincinnati45225Cincinnati45226Cincinnati45227Cincinnati45229Cincinnati45230Cincinnati45231Cincinnati45232Cincinnati45233Cincinnati45234Cincinnati45235Cincinnati45236Cincinnati45237Cincinnati45238Cincinnati45239Cincinnati45240Cincinnati45241Cincinnati45242Cincinnati45243Cincinnati45244Cincinnati45245Cincinnati45246Cincinnati45247Cincinnati45248Cincinnati45249Cincinnati45250Cincinnati45251Cincinnati45252Cincinnati45253Cincinnati45254Cincinnati45255Cincinnati45258Cincinnati45262Cincinnati45263Cincinnati45264Cincinnati45267Cincinnati45268Cincinnati45269Cincinnati45270Cincinnati45271Cincinnati45273Cincinnati45274Cincinnati45277Cincinnati45280Cincinnati45296Cincinnati45298Cincinnati45299Cincinnati45302Anna45303Ansonia45304Arcanum45305Bellbrook45306Botkins45307Bowersville45308Bradford45309Brookville45311Camden45312Casstown45314Cedarville45315Clayton45316Clifton45317Conover45318Covington45319Donnelsville45320Eaton45321Eldorado45322Englewood45323Enon45324Fairborn45325Farmersville45326Fletcher45327Germantown45328Gettysburg45330Gratis45331Greenville45332Hollansburg45333Houston45334Jackson Center45335Jamestown45336Kettlersville45337Laura45338Lewisburg45339Ludlow Falls45340Maplewood45341Medway45342Miamisburg45343Miamisburg45344New Carlisle45345New Lebanon45346New Madison45347New Paris45348New Weston45349North Hampton45350North Star45351Osgood45352Palestine45353Pemberton45354Phillipsburg45356Piqua45359Pleasant Hill45360Port Jefferson45361Potsdam45362Rossburg45363Russia45365Sidney45367Sidney45368South Charleston45369South Vienna45370Spring Valley45371Tipp City45372Tremont City45373Troy45374Troy45377Vandalia45378Verona45380Versailles45381West Alexandria45382West Manchester45383West Milton45384Wilberforce45385Xenia45387Yellow Springs45388Yorkshire45389Christiansburg45390Union City45401Dayton45402Dayton45403Dayton45404Dayton45405Dayton45406Dayton45409Dayton45410Dayton45412Dayton45413Dayton45414Dayton45415Dayton45416Dayton45417Dayton45419Dayton45420Dayton45422Dayton45423Dayton45424Dayton45426Dayton45428Dayton45429Dayton45430Dayton45431Dayton45432Dayton45433Dayton45434Dayton45435Dayton45437Dayton45439Dayton45440Dayton45441Dayton45448Dayton45449Dayton45458Dayton45459Dayton45470Dayton45475Dayton45479Dayton45481Dayton45482Dayton45490Dayton45501Springfield45502Springfield45503Springfield45504Springfield45505Springfield45506Springfield45601Chillicothe45612Bainbridge45613Beaver45614Bidwell45616Blue Creek45617Bourneville45618Cherry Fork45619Chesapeake45620Cheshire45621Coalton45622Creola45623Crown City45624Cynthiana45628Frankfort45629Franklin Furnace45630Friendship45631Gallipolis45633Hallsville45634Hamden45636Haverhill45638Ironton45640Jackson45642Jasper45643Kerr45644Kingston45645Kitts Hill45646Latham45647Londonderry45648Lucasville45650Lynx45651Mc Arthur45652Mc Dermott45653Minford45654New Plymouth45656Oak Hill45657Otway45658Patriot45659Pedro45660Peebles45661Piketon45662Portsmouth45663West Portsmouth45669Proctorville45671Rarden45672Ray45673Richmond Dale45674Rio Grande45677Scioto Furnace45678Scottown45679Seaman45680South Point45681South Salem45682South Webster45683Stockdale45684Stout45685Thurman45686Vinton45687Wakefield45688Waterloo45690Waverly45692Wellston45693West Union45694Wheelersburg45695Wilkesville45696Willow Wood45697Winchester45698Zaleski45699Lucasville45701Athens45710Albany45711Amesville45712Barlow45713Bartlett45714Belpre45715Beverly45716Buchtel45717Carbondale45719Chauncey45720Chester45721Coal Run45723Coolville45724Cutler45727Dexter City45729Fleming45732Glouster45734Graysville45735Guysville45739Hockingport45740Jacksonville45741Langsville45742Little Hocking45743Long Bottom45744Lowell45745Lower Salem45746Macksburg45750Marietta45760Middleport45761Millfield45764Nelsonville45766New Marshfield45767New Matamoras45768Newport45769Pomeroy45770Portland45771Racine45772Reedsville45773Reno45775Rutland45776Shade45777Sharpsburg45778Stewart45779Syracuse45780The Plains45782Trimble45783Tuppers Plains45784Vincent45786Waterford45787Watertown45788Whipple45789Wingett Run45801Lima45802Lima45804Lima45805Lima45806Lima45807Lima45808Beaverdam45809Gomer45810Ada45812Alger45813Antwerp45814Arlington45815Belmore45816Benton Ridge45817Bluffton45819Buckland45821Cecil45822Celina45826Chickasaw45827Cloverdale45828Coldwater45830Columbus Grove45831Continental45832Convoy45833Delphos45835Dola45836Dunkirk45837Dupont45838Elgin45839Findlay45840Findlay45841Jenera45843Forest45844Fort Jennings45845Fort Loramie45846Fort Recovery45848Glandorf45849Grover Hill45850Harrod45851Haviland45853Kalida45854Lafayette45856Leipsic45858Mc Comb45859Mc Guffey45860Maria Stein45861Melrose45862Mendon45863Middle Point45864Miller City45865Minster45866Montezuma45867Mount Blanchard45868Mount Cory45869New Bremen45870New Hampshire45871New Knoxville45872North Baltimore45873Oakwood45874Ohio City45875Ottawa45876Ottoville45877Pandora45879Paulding45880Payne45881Rawson45882Rockford45883Saint Henry45884Saint Johns45885Saint Marys45886Scott45887Spencerville45888Uniopolis45889Van Buren45890Vanlue45891Van Wert45893Vaughnsville45894Venedocia45895Wapakoneta45896Waynesfield45897Williamstown45898Willshire45899Wren45999Cincinnati

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 Ohio have violations?

274 of 1,085 active community water systems in Ohio reported at least one health-based violation since 2016 (EPA SDWIS).

What is the radon risk in Ohio?

857 ZIP codes are in EPA radon zone 1 (highest potential), 534 in zone 2 and 0 in zone 3. EPA recommends testing every home.