Illinois

It depends on the town. 389 of 448 listed water systems in Illinois, United States are low risk (86.8%).

• 389Low
• 46Medium
• 13High
• 0Critical

• Abs CoopLow risk
• AddisonLow risk
• AledoLow risk
• AlgonquinLow risk
• AlsipLow risk
• Alton2 systems · low risk
• AnnaMedium risk
• AntiochLow risk
• Arlington HeightsLow risk
• AthensLow risk
• AuburnLow risk
• AuroraLow risk
• BarringtonLow risk
• BartlettLow risk
• BataviaLow risk
• Beach ParkLow risk
• BeardstownLow risk
• BeecherLow risk
• BellwoodMedium risk
• BelvidereLow risk
• BensenvilleLow risk
• Benton2 systems · includes medium risk
• BerkeleyLow risk
• BerwynLow risk
• BethaltoLow risk
• BloomingdaleLow risk
• BloomingtonLow risk
• Blue IslandLow risk
• BolingbrookLow risk
• Bond/madisonLow risk
• BraidwoodLow risk
• BreeseLow risk
• BridgeviewLow risk
• BrightonLow risk
• BroadviewLow risk
• BrookfieldLow risk
• Buffalo GroveLow risk
• BurbankLow risk
• BurnhamHigh risk
• Burr RidgeLow risk
• ByronLow risk
• CahokiaLow risk
• Calumet CityMedium risk
• Calumet ParkLow risk
• CantonLow risk
• CarbondaleMedium risk
• CarlinvilleLow risk
• CarlyleLow risk
• CarmiLow risk
• Carol StreamLow risk
• CarpentersvilleLow risk
• CarrolltonLow risk
• CartervilleLow risk
• CaryLow risk
• CaseyvilleLow risk
• Centralia2 systems · low risk
• Champaign2 systems · low risk
• ChannahonLow risk
• Charleston3 systems · includes medium risk
• ChathamLow risk
• Cherry ValleyLow risk
• ChesterLow risk
• ChicagoLow risk
• Chicago HeightsLow risk
• Chicago RidgeLow risk
• ChillicotheLow risk
• CiceroMedium risk
• Clarendon HillsLow risk
• ClintonLow risk
• Coal CityMedium risk
• Coal ValleyLow risk
• CollinsvilleLow risk
• ColumbiaLow risk
• Corinth PwdLow risk
• CortlandLow risk
• Country Club HillsLow risk
• CountrysideLow risk
• Crest HillMedium risk
• CrestwoodLow risk
• CreteLow risk
• Creve CoeurLow risk
• Crystal LakeLow risk
• DanvilleLow risk
• Darien2 systems · low risk
• DecaturLow risk
• DeerfieldLow risk
• DeKalb2 systems · low risk
• Des PlainesLow risk
• DixonLow risk
• DoltonLow risk
• Downers GroveLow risk
• Du QuoinHigh risk
• DupoLow risk
• DwightLow risk
• East AltonLow risk
• East MolineLow risk
• East Peoria2 systems · low risk
• East Saint LouisLow risk
• Edwardsville2 systems · low risk
• Effingham2 systems · low risk
• Ej CooperativeLow risk
• ElburnLow risk
• Eldorado2 systems · includes high risk
• ElginLow risk
• Elk Grove VillageLow risk
• ElmhurstLow risk
• Elmwood ParkLow risk
• Eureka2 systems · low risk
• EvanstonLow risk
• Evergreen ParkLow risk
• FairburyMedium risk
• FairfieldMedium risk
• FayetteMedium risk
• FloraLow risk
• FlossmoorLow risk
• Forest ParkLow risk
• ForsythLow risk
• Fox LakeLow risk
• Fox River GroveLow risk
• FrankfortLow risk
• Franklin Park2 systems · low risk
• FreeburgLow risk
• FreeportLow risk
• FultonMedium risk
• GalenaMedium risk
• GalesburgLow risk
• GeneseoLow risk
• Geneva2 systems · low risk
• GenoaMedium risk
• GeorgetownLow risk
• Gibson CityLow risk
• GilbertsLow risk
• GillespieHigh risk
• Glen CarbonLow risk
• Glen EllynLow risk
• GlencoeLow risk
• Glendale HeightsLow risk
• Glenview4 systems · includes medium risk
• GlenwoodLow risk
• Godfrey9 systems · includes medium risk
• Granite City2 systems · low risk
• GrayslakeLow risk
• GreenvilleLow risk
• GurneeLow risk
• HainesvilleLow risk
• HamiltonLow risk
• HampshireLow risk
• Hanover ParkLow risk
• HardinLow risk
• HarrisburgHigh risk
• HarvardLow risk
• HarveyLow risk
• Harwood HeightsLow risk
• Hazel CrestLow risk
• HerrinLow risk
• Hickory HillsLow risk
• Highland2 systems · low risk
• Highland ParkLow risk
• HighwoodLow risk
• HillsboroLow risk
• HillsideLow risk
• HinsdaleLow risk
• Hoffman EstatesLow risk
• HometownLow risk
• HomewoodLow risk
• HoopestonLow risk
• HuntleyMedium risk
• Island LakeLow risk
• ItascaLow risk
• JacksonvilleLow risk
• Jerseyville2 systems · low risk
• Johnston CityMedium risk
• JolietMedium risk
• JusticeLow risk
• KankakeeMedium risk
• KewaneeLow risk
• La GrangeLow risk
• La Grange Highlands SanitaryLow risk
• La Grange ParkLow risk
• La SalleLow risk
• Lake BluffLow risk
• Lake ForestLow risk
• Lake in the HillsLow risk
• Lake VillaLow risk
• Lake ZurichLow risk
• LakewoodLow risk
• LansingLow risk
• LawrencevilleHigh risk
• Le RoyMedium risk
• LebanonLow risk
• LemontHigh risk
• Libertyville4 systems · low risk
• LincolnMedium risk
• LincolnshireLow risk
• LincolnwoodLow risk
• LindenhurstLow risk
• LisleLow risk
• LitchfieldMedium risk
• LockportLow risk
• LombardLow risk
• Long CreekLow risk
• Loves ParkLow risk
• LynwoodLow risk
• LyonsLow risk
• Machesney ParkLow risk
• MackinawLow risk
• Macomb2 systems · includes medium risk
• Mahomet2 systems · low risk
• Manhattan2 systems · low risk
• MarengoLow risk
• Marion3 systems · includes medium risk
• MarkhamLow risk
• MarseillesHigh risk
• Marshall2 systems · low risk
• MaryvilleLow risk
• MascoutahLow risk
• MattesonLow risk
• Mattoon2 systems · low risk
• MaywoodHigh risk
• McHenryLow risk
• McLeansboroLow risk
• Melrose ParkLow risk
• MendotaLow risk
• MetamoraLow risk
• Metropolis2 systems · low risk
• MidlothianLow risk
• MilanLow risk
• MillstadtLow risk
• MinookaLow risk
• MokenaLow risk
• MolineLow risk
• MoneeLow risk
• MonmouthMedium risk
• MontgomeryLow risk
• MonticelloLow risk
• MorrisLow risk
• MorrisonLow risk
• MortonLow risk
• Morton GroveLow risk
• Mount CarmelMedium risk
• Mount ProspectLow risk
• Mount Vernon2 systems · low risk
• Mount ZionMedium risk
• MundeleinLow risk
• Murphysboro2 systems · includes medium risk
• NapervilleLow risk
• Nashville2 systems · includes medium risk
• New BadenLow risk
• New LenoxLow risk
• NilesLow risk
• Normal2 systems · low risk
• NorridgeLow risk
• North AuroraLow risk
• North Chicago2 systems · includes medium risk
• North RiversideLow risk
• NorthbrookLow risk
• NorthfieldHigh risk
• NorthlakeLow risk
• O'FallonLow risk
• Oak Brook2 systems · low risk
• Oak ForestLow risk
• Oak LawnLow risk
• Oak ParkLow risk
• OglesbyLow risk
• OlneyLow risk
• Olympia FieldsLow risk
• OregonMedium risk
• Orland ParkLow risk
• OswegoLow risk
• OttawaLow risk
• PalatineLow risk
• Palos HeightsLow risk
• Palos HillsLow risk
• Palos ParkLow risk
• PanaLow risk
• ParisLow risk
• Park CityLow risk
• Park ForestLow risk
• Park RidgeLow risk
• PaxtonLow risk
• PekinLow risk
• Peoria2 systems · includes medium risk
• Peoria HeightsLow risk
• PeotoneLow risk
• PeruMedium risk
• PetersburgLow risk
• PinckneyvilleMedium risk
• Pingree GroveLow risk
• Pittsfield2 systems · low risk
• PlainfieldLow risk
• PlanoLow risk
• PontiacLow risk
• Pontoon BeachLow risk
• PosenLow risk
• PrincetonLow risk
• Quincy2 systems · low risk
• RantoulLow risk
• Red BudLow risk
• Richton ParkHigh risk
• River ForestLow risk
• River GroveLow risk
• RiverdaleLow risk
• RiversideLow risk
• RivertonLow risk
• RiverwoodsLow risk
• RobbinsLow risk
• Robinson2 systems · low risk
• RochelleLow risk
• RochesterLow risk
• Rock FallsLow risk
• Rock Island2 systems · low risk
• RockfordLow risk
• RocktonLow risk
• Rolling MeadowsLow risk
• RomeovilleLow risk
• RoselleLow risk
• RosemontLow risk
• Round LakeLow risk
• Round Lake BeachLow risk
• Round Lake ParkHigh risk
• RushvilleLow risk
• SalemLow risk
• SandwichLow risk
• Sauk VillageLow risk
• SchaumburgLow risk
• Schiller ParkLow risk
• Scott Air Force BaseLow risk
• ShelbyvilleLow risk
• ShorewoodLow risk
• SilvisMedium risk
• SkokieLow risk
• SmithtonLow risk
• South BeloitLow risk
• South Chicago HeightsLow risk
• South ElginMedium risk
• South Highway PwdMedium risk
• South HollandLow risk
• South JacksonvilleMedium risk
• SpartaHigh risk
• Spring ValleyLow risk
• Springfield2 systems · low risk
• St. CharlesLow risk
• StauntonLow risk
• StegerLow risk
• StickneyLow risk
• Stone ParkLow risk
• StreamwoodLow risk
• StreatorLow risk
• Sugar GroveLow risk
• SullivanLow risk
• SummitLow risk
• SycamoreLow risk
• TaylorvilleLow risk
• Three County PwdMedium risk
• Tinley ParkLow risk
• TolonoLow risk
• TroyLow risk
• TuscolaLow risk
• ValmeyerMedium risk
• VandaliaMedium risk
• Vernon HillsLow risk
• Villa ParkLow risk
• VoloLow risk
• WarrenvilleLow risk
• WascoLow risk
• WashingtonLow risk
• WaterlooLow risk
• WatsekaLow risk
• WaucondaLow risk
• WaukeganLow risk
• West ChicagoLow risk
• West DundeeLow risk
• West FrankfortLow risk
• WestchesterLow risk
• Western SpringsMedium risk
• WestmontLow risk
• WestvilleLow risk
• WheatonLow risk
• WheelingLow risk
• WilliamsvilleLow risk
• WillowbrookLow risk
• WilmetteLow risk
• WilmingtonLow risk
• WinfieldLow risk
• WinnetkaLow risk
• Winthrop HarborLow risk
• Wonder LakeLow risk
• Wood DaleLow risk
• Wood RiverLow risk
• WoodhavenLow risk
• WoodlawnLow risk
• WoodridgeLow risk
• WoodstockMedium risk
• WorthLow risk
• YorkvilleLow risk
• ZionLow risk

Covers community water systems serving 3,300 people or more. The rating uses health-based violations of federal drinking-water standards in the last three years, and whether those violations have been fixed. Each system is placed at a town it serves, so positions are approximate.