STATE / TERRITORY LEDGER
Illinois drinking water system records
EPA’s September 2026 export lists 509 active community water systems in Illinois, with 177 current-violation flags and 10 serious-violator flags among covered systems serving at least 2,500 people.
Source: EPA SDWIS system-search export · Active community systems · Snapshot 13 Sep 2026
Systems509active CWS · pop. 2,500+
Population served11,211,316reported total; may overlap
Current violation flag34.8%177 systems
Serious-violator flag2.0%10 systems
01 / LARGEST SYSTEMS
Illinois community water systems
EPA’s covered Illinois records include 509 active community systems reporting a combined population-served total of 11,211,316, which may overlap.
Population served is a system-reported service figure. It is not a count of unique state residents.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| ChicagoIL0316000 | 2,721,308 | Surface water | No current violation flagged |
| AuroraIL0894070 | 183,000 | Surface water | No current violation flagged |
| JolietIL1970450 | 160,000 | Ground water | No current violation flagged |
| NapervilleIL0434670 | 156,406 | Surface water purchased | No current violation flagged |
| Il American-ChampaignIL0195300 | 150,000 | Ground water | No current violation flagged |
| RockfordIL2010300 | 147,051 | Ground water | No current violation flagged |
| Il American-PeoriaIL1435030 | 137,575 | Surface water | No current violation flagged |
| Il American-East St LouisIL1635040 | 131,368 | Surface water | No current violation flagged |
| SpringfieldIL1671200 | 117,444 | Surface water | No current violation flagged |
| ElginIL0894380 | 114,797 | Surface water | No current violation flagged |
| WaukeganIL0971900 | 87,149 | Surface water | Other current violation flag |
| CiceroIL0310510 | 83,000 | Surface water purchased | Current monitoring/reporting flag |
| Aqua Illinois-KankakeeIL0915030 | 80,000 | Surface water | No current violation flagged |
| BloomingtonIL1130200 | 77,610 | Surface water | No current violation flagged |
| DecaturIL1150150 | 76,122 | Surface water | No current violation flagged |
| SchaumburgIL0314890 | 75,750 | Surface water purchased | No current violation flagged |
| EvanstonIL0310810 | 74,486 | Surface water | No current violation flagged |
| Il American-West SuburbanIL1974151 | 73,978 | Surface water purchased | No current violation flagged |
| Arlington HeightsIL0314030 | 73,320 | Surface water purchased | Other current violation flag |
| PalatineIL0312340 | 70,875 | Surface water purchased | No current violation flagged |
| SkokieIL0312880 | 66,422 | Surface water purchased | Current monitoring/reporting flag |
| Des PlainesIL0310630 | 60,675 | Surface water purchased | Current monitoring/reporting flag |
| Oak LawnIL0312220 | 58,362 | Surface water purchased | Other current violation flag |
| Orland ParkIL0312310 | 58,020 | Surface water purchased | Other current violation flag |
| BerwynIL0310210 | 57,250 | Surface water purchased | Current monitoring/reporting flag |
| Tinley ParkIL0314910 | 56,703 | Surface water purchased | Other current violation flag |
| Oak ParkIL0312250 | 54,583 | Surface water purchased | No current violation flagged |
| WheatonIL0431050 | 53,970 | Surface water purchased | No current violation flagged |
| NormalIL1130900 | 52,736 | Ground water | No current violation flagged |
| RomeovilleIL1970900 | 50,458 | Ground water | No current violation flagged |
| Hoffman EstatesIL0311290 | 50,179 | Surface water purchased | No current violation flagged |
| PlainfieldIL1970800 | 50,000 | Surface water purchased | No current violation flagged |
| Downers GroveIL0430300 | 49,425 | Surface water purchased | No current violation flagged |
| GlenviewIL0311020 | 47,856 | Surface water purchased | Other current violation flag |
| O FallonIL1631100 | 46,603 | Surface water purchased | No current violation flagged |
| Il American-AltonIL1195150 | 46,127 | Surface water | No current violation flagged |
| ElmhurstIL0430350 | 45,000 | Surface water purchased | No current violation flagged |
| MolineIL1610450 | 44,500 | Surface water | No current violation flagged |
| LombardIL0430600 | 44,476 | Surface water purchased | Current monitoring/reporting flag |
| Buffalo GroveIL0314180 | 43,212 | Surface water purchased | No current violation flagged |
| QuincyIL0010650 | 42,000 | Surface water | Other current violation flag |
| BartlettIL0314120 | 41,500 | Surface water purchased | No current violation flagged |
| Mount ProspectIL0311980 | 41,000 | Surface water purchased | Other current violation flag |
| Crystal LakeIL1110150 | 40,661 | Ground water | No current violation flagged |
| DekalbIL0370100 | 40,290 | Ground water | No current violation flagged |
| Carol StreamIL0430200 | 39,854 | Surface water purchased | No current violation flagged |
| Park RidgeIL0312460 | 39,800 | Surface water purchased | Other current violation flag |
| WheelingIL0314970 | 39,725 | Surface water purchased | No current violation flagged |
| StreamwoodIL0313060 | 39,577 | Surface water purchased | No current violation flagged |
| Rock IslandIL1610650 | 39,018 | Surface water | Other current violation flag |
| OswegoIL0930150 | 38,169 | Ground water | No current violation flagged |
| AddisonIL0430050 | 38,017 | Surface water purchased | No current violation flagged |
| CarpentersvilleIL0890200 | 37,983 | Ground water | No current violation flagged |
| Hanover ParkIL0314480 | 37,470 | Surface water purchased | Other current violation flag |
| Calumet CityIL0310390 | 37,000 | Surface water purchased | Current health-based flag |
| North Park PwdIL2015500 | 35,580 | Ground water | No current violation flagged |
| NorthbrookIL0312070 | 34,407 | Surface water | No current violation flagged |
| Il American-Granite CityIL1195030 | 33,572 | Surface water | No current violation flagged |
| WoodridgeIL0431250 | 33,566 | Surface water purchased | Other current violation flag |
| Vernon Hills - Lake Co PwIL0971750 | 33,207 | Surface water purchased | No current violation flagged |
| Glendale HeightsIL0430400 | 33,176 | Surface water purchased | No current violation flagged |
| St CharlesIL0894830 | 33,103 | Ground water | Current monitoring/reporting flag |
| Elk Grove VillageIL0314400 | 31,802 | Surface water purchased | Other current violation flag |
| Il American-PekinIL1795040 | 31,731 | Ground water | No current violation flagged |
| GalesburgIL0950200 | 31,620 | Ground water | No current violation flagged |
| MundeleinIL0971150 | 31,500 | Surface water purchased | No current violation flagged |
| AlgonquinIL1110050 | 30,700 | Ground water | No current violation flagged |
| GurneeIL0970350 | 30,193 | Surface water purchased | No current violation flagged |
| Highland ParkIL0970500 | 30,176 | Surface water | No current violation flagged |
| Aqua Illinois-Vermilion CountyIL1835120 | 30,106 | Surface water | No current violation flagged |
| Aqua Illinois-North Maine UtilitiesIL0315350 | 30,043 | Surface water purchased | No current violation flagged |
| South Stickny SdIL0317370 | 30,000 | Surface water purchased | Other current violation flag |
| Ej Water CooperativeIL0790010 | 29,720 | Surface water | Other current violation flag |
| CollinsvilleIL1194280 | 29,500 | Ground water | No current violation flagged |
| NilesIL0312010 | 29,350 | Surface water purchased | Other current violation flag |
| LansingIL0311590 | 29,076 | Surface water purchased | Current monitoring/reporting flag |
| MontgomeryIL0894690 | 28,956 | Ground water | No current violation flagged |
| Glen EllynIL0430450 | 28,850 | Surface water purchased | Other current violation flag |
| Lake In The HillsIL1110400 | 28,661 | Ground water | No current violation flagged |
| HuntleyIL1110350 | 28,495 | Ground water | No current violation flagged |
| New LenoxIL1970700 | 27,690 | Surface water purchased | No current violation flagged |
| Oak ForestIL0312190 | 27,478 | Surface water purchased | Current monitoring/reporting flag |
| Round Lake BeachIL0971550 | 27,200 | Surface water purchased | No current violation flagged |
| WilmetteIL0313300 | 27,087 | Surface water | Other current violation flag |
| EdwardsvilleIL1190250 | 26,808 | Ground water | No current violation flagged |
| Chicago HeightsIL0310450 | 26,184 | Surface water purchased | Current monitoring/reporting flag |
| BataviaIL0894130 | 26,098 | Ground water | No current violation flagged |
| WoodstockIL1110950 | 25,630 | Ground water | No current violation flagged |
| BelvidereIL0070050 | 25,339 | Ground water | Other current violation flag |
| Morton GroveIL0311950 | 25,297 | Surface water purchased | Other current violation flag |
| West ChicagoIL0430900 | 25,166 | Ground water | No current violation flagged |
| Elmwood ParkIL0310780 | 25,000 | Surface water purchased | Other current violation flag |
| HarveyIL0311110 | 25,000 | Surface water purchased | Current monitoring/reporting flag |
| Il American-Homer TownshipIL1970100 | 24,543 | Surface water purchased | No current violation flagged |
| ZionIL0972000 | 24,442 | Surface water purchased | Other current violation flag |
| LisleIL0430551 | 24,223 | Surface water purchased | Other current violation flag |
| Melrose ParkIL0311860 | 24,206 | Surface water purchased | No current violation flagged |
| WestmontIL0430950 | 24,161 | Surface water purchased | No current violation flagged |
| MaywoodIL0311830 | 24,090 | Surface water purchased | Current health-based flag |
| FrankfortIL1970400 | 24,000 | Ground water | Other current violation flag |
| FreeportIL1770200 | 23,930 | Ground water | No current violation flagged |
| South ElginIL0890800 | 23,648 | Ground water | Current monitoring/reporting flag |
| Loves ParkIL2010150 | 23,335 | Ground water | Other current violation flag |
| Rolling MeadowsIL0312730 | 23,329 | Surface water purchased | Other current violation flag |
| LockportIL1970500 | 23,100 | Ground water | Current monitoring/reporting flag |
| Great Lakes Naval Training StationIL0975227 | 23,000 | Surface water | No current violation flagged |
| YorkvilleIL0930250 | 23,000 | Ground water | No current violation flagged |
| RoselleIL0434820 | 22,897 | Surface water purchased | No current violation flagged |
| MchenryIL1110600 | 22,335 | Ground water | No current violation flagged |
| East PeoriaIL1790200 | 22,284 | Ground water | No current violation flagged |
| Villa ParkIL0430800 | 22,263 | Surface water purchased | No current violation flagged |
| CarbondaleIL0770150 | 22,107 | Surface water | No current violation flagged |
| BloomingdaleIL0430100 | 22,018 | Surface water purchased | Other current violation flag |
| South HollandIL0312970 | 22,000 | Surface water purchased | Other current violation flag |
| DarienIL0430270 | 21,751 | Surface water purchased | No current violation flagged |
| Park ForestIL0314740 | 21,687 | Ground water | No current violation flagged |
| Blue IslandIL0310240 | 21,494 | Surface water purchased | No current violation flagged |
| East MolineIL1610250 | 21,374 | Surface water | No current violation flagged |
| GrayslakeIL0970250 | 21,248 | Surface water purchased | No current violation flagged |
| GenevaIL0890350 | 21,247 | Ground water | No current violation flagged |
| Crest HillIL1970250 | 21,169 | Ground water | Current serious-violator flag |
| DoltonIL0310690 | 20,510 | Surface water purchased | Current monitoring/reporting flag |
| LibertyvilleIL0970900 | 20,500 | Surface water purchased | No current violation flagged |
| Evergreen ParkIL0310840 | 19,943 | Surface water purchased | No current violation flagged |
| JacksonvilleIL1370200 | 19,903 | Surface water | No current violation flagged |
| MokenaIL1970600 | 19,887 | Surface water purchased | No current violation flagged |
| Lake ZurichIL0970850 | 19,759 | Ground water | No current violation flagged |
| Lake ForestIL0970800 | 19,642 | Surface water | No current violation flagged |
| MattoonIL0290250 | 19,500 | Surface water | No current violation flagged |
| HomewoodIL0311350 | 19,463 | Surface water purchased | Other current violation flag |
| DeerfieldIL0974340 | 19,196 | Surface water purchased | Current monitoring/reporting flag |
| BellwoodIL0310150 | 19,156 | Surface water purchased | Other current violation flag |
| AlsipIL0310030 | 19,063 | Surface water purchased | No current violation flagged |
| Il American-StreatorIL0995030 | 19,000 | Surface water | No current violation flagged |
| BrookfieldIL0310330 | 18,776 | Surface water purchased | No current violation flagged |
| ShorewoodIL1975080 | 18,645 | Ground water | No current violation flagged |
| BensenvilleIL0434140 | 18,537 | Surface water purchased | No current violation flagged |
| Palos HillsIL0312400 | 18,530 | Surface water purchased | No current violation flagged |
| SycamoreIL0370550 | 18,500 | Ground water | No current violation flagged |
| Franklin ParkIL0310960 | 18,467 | Surface water purchased | Current monitoring/reporting flag |
| Justice-Willow Springs Water CommissionIL0315820 | 18,450 | Surface water purchased | No current violation flagged |
| Round LakeIL0971500 | 18,430 | Surface water purchased | Current monitoring/reporting flag |
| MattesonIL0311800 | 18,293 | Surface water purchased | Current monitoring/reporting flag |
| North AuroraIL0890600 | 18,261 | Ground water | No current violation flagged |
| OttawaIL0990800 | 18,097 | Ground water | Current monitoring/reporting flag |
| HinsdaleIL0434520 | 17,900 | Surface water purchased | No current violation flagged |
| CaryIL1110100 | 17,826 | Ground water | Other current violation flag |
| LemontIL0311620 | 17,500 | Ground water | No current violation flagged |
| CharlestonIL0290100 | 17,286 | Surface water | Current monitoring/reporting flag |
| MortonIL1790500 | 17,111 | Ground water | No current violation flagged |
| TroyIL1191000 | 16,962 | Ground water | No current violation flagged |
| MarionIL1990550 | 16,855 | Surface water purchased | No current violation flagged |
| North ChicagoIL0971250 | 16,813 | Surface water | Other current violation flag |
| CantonIL0570250 | 16,748 | Groundwater under influence of surface water | Current monitoring/reporting flag |
| Country Club HillsIL0310540 | 16,500 | Surface water purchased | Other current violation flag |
| BridgeviewIL0310270 | 16,467 | Surface water purchased | No current violation flagged |
| ChathamIL1670300 | 16,423 | Ground water purchased | No current violation flagged |
| WestchesterIL0313150 | 16,241 | Surface water purchased | Current monitoring/reporting flag |
| La GrangeIL0311530 | 16,200 | Surface water purchased | Current monitoring/reporting flag |
| Mount VernonIL0810300 | 15,793 | Surface water purchased | No current violation flagged |
| Palos HeightsIL0312370 | 15,500 | Surface water purchased | Other current violation flag |
| WaucondaIL0971850 | 15,349 | Surface water purchased | Other current violation flag |
| NorridgeIL0312040 | 15,251 | Surface water purchased | No current violation flagged |
| BethaltoIL1190150 | 15,210 | Ground water | No current violation flagged |
| Il American-LincolnIL1075030 | 15,200 | Groundwater under influence of surface water | No current violation flagged |
| DixonIL1030200 | 15,096 | Ground water | No current violation flagged |
| MacombIL1090350 | 15,051 | Surface water | Other current violation flag |
| Wildwood Subdivision - Lake Co PwIL0977350 | 14,832 | Surface water purchased | Other current violation flag |
| MidlothianIL0311920 | 14,819 | Surface water purchased | Current monitoring/reporting flag |
| WashingtonIL1790750 | 14,793 | Ground water | No current violation flagged |
| Il American-SterlingIL1955040 | 14,782 | Ground water | No current violation flagged |
| MorrisIL0630600 | 14,775 | Ground water | No current violation flagged |
| Hickory HillsIL0311200 | 14,505 | Surface water purchased | No current violation flagged |
| LindenhurstIL0971000 | 14,500 | Surface water purchased | No current violation flagged |
| Forest ParkIL0310900 | 14,340 | Surface water purchased | Current monitoring/reporting flag |
| AntiochIL0970050 | 14,175 | Ground water | Current monitoring/reporting flag |
| Chicago RidgeIL0310480 | 14,130 | Surface water purchased | No current violation flagged |
| Wood DaleIL0431200 | 14,012 | Surface water purchased | Other current violation flag |
| CaseyvilleIL1630250 | 13,798 | Surface water purchased | No current violation flagged |
| Hazel CrestIL0311170 | 13,792 | Surface water purchased | Other current violation flag |
| LincolnwoodIL0311650 | 13,463 | Surface water purchased | No current violation flagged |
| ChannahonIL1970200 | 13,380 | Ground water | No current violation flagged |
| Western SpringsIL0313180 | 13,274 | Ground water | Current monitoring/reporting flag |
| La Grange ParkIL0311560 | 13,011 | Surface water purchased | No current violation flagged |
| RantoulIL0190650 | 13,000 | Ground water | Other current violation flag |
| U Of I-ChampaignIL0195500 | 13,000 | Ground water purchased | Current monitoring/reporting flag |
| NorthlakeIL0314710 | 12,840 | Surface water purchased | No current violation flagged |
| TaylorvilleIL0210600 | 12,806 | Surface water | Current monitoring/reporting flag |
| MinookaIL0630550 | 12,800 | Ground water | No current violation flagged |
| Jersey RwcIL0835300 | 12,750 | Surface water purchased | No current violation flagged |
| HerrinIL1990400 | 12,747 | Surface water purchased | Current monitoring/reporting flag |
| Glen CarbonIL1190300 | 12,618 | Surface water purchased | Other current violation flag |
| PlanoIL0930200 | 12,600 | Ground water | No current violation flagged |
| Cahokia HeightsIL1635000 | 12,528 | Surface water purchased | No current violation flagged |
| KewaneeIL0730650 | 12,509 | Ground water | Current monitoring/reporting flag |
| Richton ParkIL0312550 | 12,504 | Ground water | Other current violation flag |
| MarkhamIL0311770 | 12,500 | Surface water purchased | Current monitoring/reporting flag |
| WinnetkaIL0313330 | 12,475 | Surface water | No current violation flagged |
| WarrenvilleIL0430833 | 12,350 | Ground water | No current violation flagged |
| EffinghamIL0490250 | 12,252 | Surface water | No current violation flagged |
| CentraliaIL1214220 | 12,182 | Surface water | No current violation flagged |
| Il American-PontiacIL1055030 | 11,864 | Surface water | No current violation flagged |
| Fox LakeIL0970200 | 11,780 | Ground water | Other current violation flag |
| River ForestIL0312610 | 11,717 | Surface water purchased | Current monitoring/reporting flag |
| Schiller ParkIL0312850 | 11,709 | Surface water purchased | Other current violation flag |
| Washington County Water CompanyIL1895600 | 11,374 | Surface water purchased | Current monitoring/reporting flag |
| Lake Of Egypt PwdIL1995200 | 11,368 | Surface water | No current violation flagged |
| Robinson-Palestine Water CommissionIL0335030 | 11,331 | Ground water | No current violation flagged |
| Sugar GroveIL0890850 | 11,243 | Ground water | No current violation flagged |
| Burr RidgeIL0434190 | 11,192 | Surface water purchased | No current violation flagged |
| Il American-Chicago SuburbanIL0315150 | 11,187 | Surface water purchased | No current violation flagged |
| SummitIL0310060 | 11,161 | Surface water purchased | Current monitoring/reporting flag |
| ColumbiaIL1330050 | 11,129 | Surface water purchased | Other current violation flag |
| WorthIL0313360 | 10,970 | Surface water purchased | No current violation flagged |
| CrestwoodIL0310600 | 10,826 | Surface water purchased | Other current violation flag |
| HighlandIL1190550 | 10,674 | Surface water | No current violation flagged |
| Wood RiverIL1191150 | 10,464 | Ground water | Current monitoring/reporting flag |
| Pingree GroveIL0890160 | 10,365 | Ground water | Other current violation flag |
| ManhattanIL1970550 | 10,340 | Ground water | No current violation flagged |
| BarringtonIL0974080 | 10,327 | Ground water | No current violation flagged |
| LyonsIL0311710 | 10,304 | Surface water purchased | Current monitoring/reporting flag |
| PeruIL0990850 | 10,300 | Ground water | No current violation flagged |
| River GroveIL0312640 | 10,282 | Surface water purchased | No current violation flagged |
| RiverdaleIL0312580 | 10,266 | Surface water purchased | Other current violation flag |
| MurphysboroIL0770500 | 10,241 | Surface water purchased | Current monitoring/reporting flag |
| WaterlooIL1330300 | 10,190 | Ground water | No current violation flagged |
| MaryvilleIL1190750 | 10,150 | Ground water | Other current violation flag |
| Leyden Twsp Water DistrictIL0315880 | 10,000 | Surface water purchased | No current violation flagged |
| SaukIL0312790 | 9,921 | Ground water | No current violation flagged |
| WinfieldIL0431150 | 9,835 | Surface water purchased | No current violation flagged |
| La SalleIL0990300 | 9,700 | Ground water | No current violation flagged |
| StegerIL0314860 | 9,700 | Ground water | Current monitoring/reporting flag |
| Clark-Edgar RwdIL0230010 | 9,657 | Ground water | No current violation flagged |
| ItascaIL0430500 | 9,506 | Surface water purchased | No current violation flagged |
| HarvardIL1110250 | 9,469 | Ground water | No current violation flagged |
| RochelleIL1410500 | 9,446 | Ground water | No current violation flagged |
| Oak BrookIL0430700 | 9,400 | Surface water purchased | No current violation flagged |
| FlossmoorIL0310870 | 9,371 | Surface water purchased | Other current violation flag |
| RiversideIL0312670 | 9,298 | Surface water purchased | No current violation flagged |
| LynwoodIL0311680 | 9,149 | Surface water purchased | No current violation flagged |
| ParisIL0450300 | 9,100 | Ground water | Current monitoring/reporting flag |
| Harwood HeightsIL0311140 | 9,065 | Surface water purchased | No current violation flagged |
| WillowbrookIL0431100 | 9,000 | Surface water purchased | Current monitoring/reporting flag |
| GlenwoodIL0311050 | 8,956 | Surface water purchased | No current violation flagged |
| MonmouthIL1870150 | 8,902 | Ground water | No current violation flagged |
| Clear Water Service CorpIL0295100 | 8,900 | Ground water | Other current violation flag |
| OlneyIL1590200 | 8,877 | Surface water | No current violation flagged |
| GlencoeIL0310990 | 8,849 | Surface water | No current violation flagged |
| Lake VillaIL0970840 | 8,829 | Surface water purchased | No current violation flagged |
| MascoutahIL1630800 | 8,759 | Surface water purchased | Other current violation flag |
| Beach ParkIL0970190 | 8,710 | Surface water purchased | No current violation flagged |
| Clarendon HillsIL0430250 | 8,702 | Surface water purchased | No current violation flagged |
| West FrankfortIL0550700 | 8,650 | Surface water purchased | No current violation flagged |
| Rock FallsIL1950450 | 8,620 | Ground water | No current violation flagged |
| HarrisburgIL1650200 | 8,524 | Ground water purchased | Current health-based flag |
| Calumet ParkIL0310420 | 8,442 | Surface water purchased | Current monitoring/reporting flag |
| Il American-JerseyvilleIL0830250 | 8,412 | Ground water | No current violation flagged |
| ChesterIL1570100 | 8,407 | Surface water | No current violation flagged |
| GilbertsIL0890400 | 8,366 | Ground water | No current violation flagged |
| GreenvilleIL0050050 | 8,310 | Surface water | No current violation flagged |
| Prairie Path Water Co-Whispering HillsIL1115700 | 8,300 | Ground water | No current violation flagged |
| CreteIL1970300 | 8,275 | Ground water | No current violation flagged |
| HillsideIL0311230 | 8,200 | Surface water purchased | No current violation flagged |
| BentonIL0550050 | 8,104 | Surface water purchased | Current monitoring/reporting flag |
| Island LakeIL0974540 | 8,066 | Ground water | No current violation flagged |
| Mill Creek Water Reclamation DistrictIL0890120 | 8,000 | Ground water | Other current violation flag |
| Western Illinois UniversityIL1095510 | 8,000 | Surface water purchased | No current violation flagged |
| Fosterburg PwdIL1195220 | 7,940 | Surface water purchased | No current violation flagged |
| LincolnshireIL0970950 | 7,940 | Surface water purchased | Other current violation flag |
| SalemIL1210450 | 7,905 | Surface water | No current violation flagged |
| Il American-South BeloitIL2010450 | 7,893 | Ground water purchased | No current violation flagged |
| Long Creek Township PWSIL1155150 | 7,850 | Ground water | No current violation flagged |
| BroadviewIL0310300 | 7,847 | Surface water purchased | Current monitoring/reporting flag |
| West DundeeIL0890950 | 7,845 | Ground water | No current violation flagged |
| PrincetonIL0110850 | 7,832 | Ground water | No current violation flagged |
| Rock Island Arsenal, US ArmyIL1615387 | 7,800 | Surface water | No current violation flagged |
| HampshireIL0890450 | 7,758 | Ground water | No current violation flagged |
| RocktonIL2010350 | 7,685 | Ground water | No current violation flagged |
| North Tazewell PwdIL1795780 | 7,625 | Ground water | Current monitoring/reporting flag |
| VandaliaIL0510350 | 7,616 | Surface water | Current monitoring/reporting flag |
| MarengoIL1110650 | 7,572 | Ground water | No current violation flagged |
| SilvisIL1610700 | 7,473 | Surface water purchased | Current health-based flag |
| ClintonIL0390050 | 7,200 | Ground water | Other current violation flag |
| DuquoinIL1450100 | 7,169 | Surface water purchased | Current health-based flag |
| SandwichIL0374850 | 7,156 | Ground water | Current monitoring/reporting flag |
| MendotaIL0990550 | 7,100 | Ground water | No current violation flagged |
| Raccoon Water CompanyIL1215100 | 7,080 | Surface water purchased | No current violation flagged |
| North RiversideIL0312160 | 7,071 | Surface water purchased | No current violation flagged |
| Mount CarmelIL1850200 | 7,015 | Groundwater under influence of surface water | No current violation flagged |
| Aqua Illinois-University ParkIL1975030 | 7,002 | Surface water purchased | No current violation flagged |
| Southeast Regional Water FacilityIL0430060 | 6,940 | Surface water purchased | No current violation flagged |
| StickneyIL0313000 | 6,902 | Surface water purchased | No current violation flagged |
| Abs Water CoopIL0015350 | 6,858 | Ground water purchased | No current violation flagged |
| American Water Oper And Maintenance, LlcIL1635237 | 6,779 | Surface water purchased | No current violation flagged |
| Il American-Valley ViewIL0437350 | 6,721 | Surface water purchased | No current violation flagged |
| ChillicotheIL1430200 | 6,660 | Ground water | No current violation flagged |
| Curran-Gardner Township PwdIL1675350 | 6,651 | Ground water | No current violation flagged |
| LitchfieldIL1350400 | 6,648 | Surface water | Current monitoring/reporting flag |
| Bond/Madison Water CompanyIL0050020 | 6,645 | Surface water purchased | No current violation flagged |
| VoloIL0971770 | 6,629 | Surface water purchased | No current violation flagged |
| Il American-Dupage UtilityIL0430552 | 6,613 | Surface water purchased | No current violation flagged |
| Illinois State University-NormalIL1135510 | 6,600 | Ground water purchased | No current violation flagged |
| La Grange Highlands Sanitary DistrictIL0315860 | 6,600 | Surface water purchased | Other current violation flag |
| CarlinvilleIL1170150 | 6,598 | Surface water | No current violation flagged |
| MahometIL0190450 | 6,580 | Ground water | No current violation flagged |
| Winthrop HarborIL0971950 | 6,565 | Surface water purchased | Current serious-violator flag |
| ElburnIL0890300 | 6,559 | Ground water | No current violation flagged |
| GeneseoIL0730500 | 6,539 | Ground water | No current violation flagged |
| CartervilleIL1990150 | 6,528 | Surface water purchased | No current violation flagged |
| Northern Illinois University-DekalbIL0375500 | 6,500 | Ground water purchased | No current violation flagged |
| Aqua Illinois-Candlewick DvnIL0075050 | 6,426 | Ground water | No current violation flagged |
| CountrysideIL0310570 | 6,420 | Surface water purchased | No current violation flagged |
| Dallas Rural Water DistrictIL0710010 | 6,370 | Ground water | No current violation flagged |
| MetropolisIL1270150 | 6,309 | Ground water | No current violation flagged |
| CarmiIL1930100 | 6,307 | Ground water | No current violation flagged |
| Fort Massac PwdIL1275050 | 6,290 | Ground water purchased | No current violation flagged |
| FairfieldIL1910100 | 6,202 | Surface water | No current violation flagged |
| WilliamsvilleIL1671300 | 6,198 | Surface water purchased | No current violation flagged |
| BraidwoodIL1970150 | 6,194 | Ground water | No current violation flagged |
| BeardstownIL0170150 | 5,951 | Ground water | No current violation flagged |
| Peoria HeightsIL1434750 | 5,908 | Ground water | No current violation flagged |
| Mount ZionIL1150350 | 5,833 | Surface water purchased | No current violation flagged |
| PinckneyvilleIL1450150 | 5,804 | Surface water | No current violation flagged |
| HoopestonIL1830450 | 5,802 | Ground water | No current violation flagged |
| PanaIL0210500 | 5,800 | Surface water | No current violation flagged |
| East AltonIL1190200 | 5,786 | Ground water | Other current violation flag |
| StauntonIL1171050 | 5,756 | Surface water | No current violation flagged |
| Mill Creek PwdIL0015300 | 5,755 | Ground water | Current monitoring/reporting flag |
| Grandwood Park Subdivision - Lake Co PwIL0975600 | 5,751 | Surface water purchased | No current violation flagged |
| Coal CityIL0630200 | 5,749 | Ground water | Current monitoring/reporting flag |
| WilmingtonIL1971100 | 5,700 | Surface water | Current monitoring/reporting flag |
| Fayette Water CompanyIL0510010 | 5,608 | Surface water purchased | Current serious-violator flag |
| Lake BluffIL0970750 | 5,600 | Surface water purchased | Current monitoring/reporting flag |
| ShelbyvilleIL1730300 | 5,600 | Ground water | Other current violation flag |
| Spring ValleyIL0111000 | 5,582 | Ground water | No current violation flagged |
| Millstone PwdIL1515050 | 5,565 | Ground water | No current violation flagged |
| MonticelloIL1470350 | 5,548 | Ground water | No current violation flagged |
| Il American-FernwayIL0315030 | 5,521 | Surface water purchased | No current violation flagged |
| Eastern Illinois UniversityIL0295500 | 5,500 | Surface water purchased | No current violation flagged |
| WatsekaIL0750900 | 5,500 | Ground water | Other current violation flag |
| Northeast Mount Vernon Water CompanyIL0810010 | 5,483 | Surface water purchased | No current violation flagged |
| NorthfieldIL0312100 | 5,470 | Surface water purchased | Current monitoring/reporting flag |
| Park CityIL0971400 | 5,425 | Surface water purchased | No current violation flagged |
| RobbinsIL0312700 | 5,415 | Surface water purchased | Current serious-violator flag |
| Pike County Pwd 1IL1495000 | 5,375 | Ground water | No current violation flagged |
| Aqua Illinois-Oak BrookIL0430055 | 5,361 | Surface water purchased | No current violation flagged |
| HighwoodIL0970550 | 5,335 | Surface water | Current monitoring/reporting flag |
| PosenIL0312520 | 5,331 | Surface water purchased | Other current violation flag |
| Sangamon Valley PwdIL0195150 | 5,300 | Ground water | No current violation flagged |
| GenoaIL0370150 | 5,298 | Ground water | No current violation flagged |
| Mitchell PwdIL1195210 | 5,253 | Surface water purchased | No current violation flagged |
| FloraIL0250100 | 5,233 | Surface water purchased | No current violation flagged |
| EurekaIL2030200 | 5,216 | Ground water | No current violation flagged |
| BerkeleyIL0310180 | 5,214 | Surface water purchased | No current violation flagged |
| MoneeIL1970650 | 5,148 | Ground water | No current violation flagged |
| Caterpillar Trail PwdIL2035030 | 5,125 | Ground water | No current violation flagged |
| Aqua Illinois-WillowbrookIL1977870 | 5,100 | Ground water | No current violation flagged |
| MarseillesIL0990500 | 5,061 | Ground water | Current health-based flag |
| BrightonIL1174160 | 5,041 | Surface water purchased | No current violation flagged |
| South Highway PwdIL0775400 | 4,972 | Surface water purchased | No current violation flagged |
| Murdale PwdIL0775200 | 4,963 | Surface water purchased | No current violation flagged |
| MilanIL1610400 | 4,945 | Ground water | Current monitoring/reporting flag |
| Creve CoeurIL1790100 | 4,934 | Ground water | No current violation flagged |
| Olympia FieldsIL0312280 | 4,922 | Surface water purchased | Current monitoring/reporting flag |
| AnnaIL1810050 | 4,910 | Ground water purchased | No current violation flagged |
| Round Lake ParkIL0971600 | 4,900 | Surface water purchased | Current serious-violator flag |
| TuscolaIL0415030 | 4,875 | Ground water purchased | Other current violation flag |
| Palos ParkIL0311000 | 4,873 | Surface water purchased | No current violation flagged |
| West Prairie Water CompanyIL0410030 | 4,800 | Ground water purchased | No current violation flagged |
| BreeseIL0270250 | 4,772 | Surface water | No current violation flagged |
| Prairie Path Water Company-Lake HolidayIL0995200 | 4,750 | Ground water | No current violation flagged |
| Cherry ValleyIL2010050 | 4,731 | Ground water | Current monitoring/reporting flag |
| SullivanIL1390300 | 4,729 | Ground water | Current monitoring/reporting flag |
| PetersburgIL1290200 | 4,725 | Ground water | No current violation flagged |
| EldoradoIL1655030 | 4,715 | Ground water purchased | Current health-based flag |
| LebanonIL1630650 | 4,714 | Surface water purchased | No current violation flagged |
| BeecherIL1970050 | 4,713 | Ground water | Other current violation flag |
| FreeburgIL1630600 | 4,707 | Surface water purchased | No current violation flagged |
| Fox River GroveIL1110200 | 4,702 | Ground water | No current violation flagged |
| PittsfieldIL1490750 | 4,697 | Ground water | Current monitoring/reporting flag |
| DupoIL1630350 | 4,684 | Ground water | No current violation flagged |
| Calhoun County RwdIL0130010 | 4,675 | Ground water | No current violation flagged |
| Stone ParkIL0313030 | 4,576 | Surface water purchased | Current monitoring/reporting flag |
| AthensIL1290050 | 4,575 | Ground water | No current violation flagged |
| AuburnIL1670050 | 4,574 | Surface water purchased | No current violation flagged |
| LawrencevilleIL1010150 | 4,524 | Ground water | Current serious-violator flag |
| OglesbyIL0990700 | 4,500 | Ground water | Current monitoring/reporting flag |
| HillsboroIL1350300 | 4,402 | Surface water | Current monitoring/reporting flag |
| DwightIL1050250 | 4,400 | Ground water | No current violation flagged |
| CortlandIL0370051 | 4,398 | Ground water | No current violation flagged |
| SpartaIL1570600 | 4,395 | Surface water | Current health-based flag |
| SmithtonIL1631300 | 4,381 | Surface water purchased | No current violation flagged |
| RivertonIL1670950 | 4,279 | Ground water | No current violation flagged |
| LakewoodIL1115760 | 4,267 | Ground water | Other current violation flag |
| HometownIL0311320 | 4,240 | Surface water purchased | Other current violation flag |
| GeorgetownIL1830350 | 4,200 | Ground water | Other current violation flag |
| PaxtonIL0530250 | 4,200 | Ground water | No current violation flagged |
| MorrisonIL1950350 | 4,188 | Ground water | Current monitoring/reporting flag |
| Aqua Illinois-PeotoneIL1970750 | 4,182 | Surface water purchased | No current violation flagged |
| New BadenIL0274700 | 4,178 | Surface water purchased | No current violation flagged |
| WoodhavenIL1035100 | 4,100 | Ground water | Other current violation flag |
| MillstadtIL1630850 | 4,071 | Surface water purchased | No current violation flagged |
| Coal Valley PwdIL1995250 | 4,023 | Surface water purchased | No current violation flagged |
| Wasco SdIL0890110 | 4,000 | Ground water | No current violation flagged |
| BurnhamIL0310360 | 3,989 | Surface water purchased | Current monitoring/reporting flag |
| North East Central PwdIL1195280 | 3,975 | Ground water purchased | No current violation flagged |
| Hamilton County Water DistrictIL0651000 | 3,958 | Surface water purchased | No current violation flagged |
| RosemontIL0312760 | 3,952 | Surface water purchased | Current monitoring/reporting flag |
| MarshallIL0230100 | 3,947 | Ground water | Other current violation flag |
| Corinth PwdIL1995120 | 3,927 | Surface water purchased | Other current violation flag |
| South Chicago HeightsIL0312940 | 3,924 | Surface water purchased | Current monitoring/reporting flag |
| Saline Valley Conservancy DistrictIL1655300 | 3,921 | Ground water | No current violation flagged |
| WestvilleIL1830950 | 3,917 | Surface water purchased | No current violation flagged |
| MetamoraIL2030350 | 3,895 | Ground water | No current violation flagged |
| Coal ValleyIL1614260 | 3,873 | Ground water | No current violation flagged |
| Wonder LakeIL1115750 | 3,870 | Ground water | No current violation flagged |
| RochesterIL1671000 | 3,856 | Surface water purchased | No current violation flagged |
| Red BudIL1570450 | 3,804 | Ground water | No current violation flagged |
| Greene County RwdIL0610020 | 3,786 | Ground water purchased | No current violation flagged |
| ByronIL1410100 | 3,784 | Ground water | Current monitoring/reporting flag |
| Pleasant Valley PwdIL1435470 | 3,783 | Ground water | Current monitoring/reporting flag |
| Embarras Area Water DistrictIL0290020 | 3,750 | Ground water purchased | No current violation flagged |
| GillespieIL1170400 | 3,737 | Surface water | Current serious-violator flag |
| Lcpw - Pekara SubdivisionIL0975900 | 3,711 | Surface water purchased | No current violation flagged |
| Fountain Water DistrictIL1330020 | 3,650 | Ground water | Current health-based flag |
| Rend Lake Inter-City Water SystemIL0555100 | 3,650 | Surface water | No current violation flagged |
| FairburyIL1050350 | 3,633 | Ground water | No current violation flagged |
| RiverwoodsIL0971450 | 3,618 | Surface water purchased | No current violation flagged |
| Il American-TolonoIL0191000 | 3,604 | Ground water purchased | No current violation flagged |
| WoodlawnIL0810450 | 3,587 | Surface water purchased | No current violation flagged |
| Three County PwdIL1195450 | 3,575 | Surface water purchased | No current violation flagged |
| HainesvilleIL0970400 | 3,528 | Ground water | No current violation flagged |
| Western Wayne Water DistrictIL1910010 | 3,516 | Surface water purchased | No current violation flagged |
| Johnston CityIL1990500 | 3,509 | Surface water purchased | Current monitoring/reporting flag |
| South JacksonvilleIL1370400 | 3,501 | Ground water | Current monitoring/reporting flag |
| Gibson CityIL0530100 | 3,500 | Ground water | No current violation flagged |
| Le RoyIL1130750 | 3,498 | Ground water | Current monitoring/reporting flag |
| ForsythIL1150200 | 3,490 | Ground water | No current violation flagged |
| AledoIL1310050 | 3,470 | Ground water | No current violation flagged |
| Tritownship Water DistrictIL1190080 | 3,470 | Surface water purchased | No current violation flagged |
| OregonIL1410400 | 3,449 | Ground water | Other current violation flag |
| Hardinville Water CompanyIL0330020 | 3,403 | Ground water | No current violation flagged |
| MackinawIL1790350 | 3,399 | Ground water | No current violation flagged |
| RushvilleIL1690200 | 3,375 | Ground water | Other current violation flag |
| CarlyleIL0270300 | 3,373 | Surface water | Current monitoring/reporting flag |
| Lake Sara Area Water Co-Op, Inc.IL0495150 | 3,352 | Surface water purchased | No current violation flagged |
| FultonIL1950250 | 3,346 | Ground water | Current health-based flag |
| Pontoon Beach PwdIL1195300 | 3,325 | Surface water purchased | No current violation flagged |
| GalenaIL0850200 | 3,308 | Ground water | Other current violation flag |
| Il American-Liberty Ridge WestIL0435650 | 3,307 | Surface water purchased | No current violation flagged |
| AbingdonIL0950050 | 3,275 | Ground water purchased | No current violation flagged |
| CaseyIL0230050 | 3,274 | Ground water purchased | Current monitoring/reporting flag |
| VirdenIL1171100 | 3,274 | Surface water purchased | Other current violation flag |
| Mount SterlingIL0090100 | 3,271 | Ground water purchased | No current violation flagged |
| Indian Head ParkIL0311410 | 3,240 | Surface water purchased | Other current violation flag |
| NashvilleIL1890300 | 3,230 | Surface water | No current violation flagged |
| North East Marion County Water CmpnyIL1210030 | 3,220 | Surface water purchased | No current violation flagged |
| KnoxvilleIL0950300 | 3,120 | Ground water purchased | No current violation flagged |
| East DundeeIL0890250 | 3,115 | Ground water | Current monitoring/reporting flag |
| Smg Water CoopIL1370030 | 3,110 | Surface water purchased | No current violation flagged |
| Sleepy HollowIL0890750 | 3,100 | Surface water purchased | No current violation flagged |
| MomenceIL0910650 | 3,075 | Ground water | No current violation flagged |
| ChristopherIL0550150 | 3,072 | Surface water purchased | No current violation flagged |
| Aqua Illinois-Hawthorn WoodsIL0975040 | 3,065 | Ground water | No current violation flagged |
| Lakeside PwdIL0775150 | 3,065 | Surface water purchased | Current serious-violator flag |
| SavannaIL0150250 | 3,020 | Ground water | Current monitoring/reporting flag |
| Oasis MhpIL0315185 | 3,000 | Ground water | No current violation flagged |
| NewtonIL0790100 | 2,977 | Ground water | No current violation flagged |
| Marquette HeightsIL1790400 | 2,974 | Ground water | Current monitoring/reporting flag |
| DixmoorIL0310660 | 2,973 | Surface water purchased | Current monitoring/reporting flag |
| BushnellIL1090150 | 2,972 | Ground water | No current violation flagged |
| HavanaIL1250200 | 2,963 | Ground water | No current violation flagged |
| Menard Correctional CenterIL1575550 | 2,950 | Surface water purchased | Current serious-violator flag |
| PittsburgIL1990600 | 2,948 | Surface water purchased | No current violation flagged |
| Fmc Water CompanyIL1210020 | 2,945 | Surface water purchased | No current violation flagged |
| WinnebagoIL2010500 | 2,940 | Ground water | No current violation flagged |
| ArcolaIL0410050 | 2,927 | Ground water purchased | No current violation flagged |
| Mount MorrisIL1410350 | 2,861 | Ground water | Other current violation flag |
| HeyworthIL1130650 | 2,853 | Ground water | No current violation flagged |
| Mission Brook SdIL0315920 | 2,852 | Surface water purchased | Current monitoring/reporting flag |
| Holiday Shores SdIL1195110 | 2,840 | Surface water | No current violation flagged |
| AlbionIL0470050 | 2,839 | Ground water | No current violation flagged |
| Southern Il University-EdwardsvilleIL1195550 | 2,817 | Ground water purchased | No current violation flagged |
| El PasoIL2030150 | 2,812 | Ground water | No current violation flagged |
| McleansboroIL0650200 | 2,812 | Surface water purchased | Current serious-violator flag |
| South Palos Twsp Sanitary DistIL0310140 | 2,800 | Surface water purchased | Current monitoring/reporting flag |
| North Morgan Water CoopIL1375050 | 2,763 | Surface water purchased | No current violation flagged |
| HamiltonIL0670400 | 2,753 | Surface water | No current violation flagged |
| TrentonIL0270500 | 2,742 | Surface water purchased | Other current violation flag |
| LakemoorIL0970270 | 2,720 | Ground water | Other current violation flag |
| Burnside PwdIL0875050 | 2,702 | Surface water purchased | No current violation flagged |
| PawneeIL1670850 | 2,700 | Surface water purchased | No current violation flagged |
| LenaIL1770300 | 2,680 | Ground water | Other current violation flag |
| Colona WestIL0730550 | 2,640 | Ground water | No current violation flagged |
| Fox Lake Hills Subdivision - Lake Co PwIL0975550 | 2,628 | Surface water purchased | No current violation flagged |
| Round Lake HeightsIL0970260 | 2,622 | Surface water purchased | No current violation flagged |
| Moultrie County RwdIL1395150 | 2,600 | Surface water purchased | No current violation flagged |
| BridgeportIL1010100 | 2,572 | Ground water | No current violation flagged |
| Saddlebrook FarmsIL0970120 | 2,558 | Ground water | Other current violation flag |
| SesserIL0550450 | 2,556 | Surface water purchased | No current violation flagged |
| AvistonIL0270100 | 2,545 | Surface water purchased | No current violation flagged |
| OdinIL1210350 | 2,543 | Surface water purchased | No current violation flagged |
| Greenwood-Creek Nation Water CompanyIL0555200 | 2,530 | Surface water purchased | No current violation flagged |
| KenilworthIL0311500 | 2,514 | Surface water purchased | No current violation flagged |
| CarrolltonIL0610050 | 2,513 | Ground water | Current monitoring/reporting flag |
| CarthageIL0670250 | 2,510 | Ground water | No current violation flagged |
| DiamondIL0630250 | 2,508 | Ground water | No current violation flagged |
| Colona EastIL0730400 | 2,501 | Ground water | No current violation flagged |
| AmboyIL1030050 | 2,500 | Ground water | No current violation flagged |
02 / CITY REPORTS
Illinois city water-system reports
Illinois has 220 city reports meeting the publication threshold for covered systems or reported population served.
Charleston2 systemsEast Peoria2 systemsEffingham2 systemsEldorado2 systemsEureka2 systemsForest Park2 systemsHampshire2 systemsHighland2 systemsManhattan2 systemsMarion2 systemsNashville2 systemsNormal2 systemsNorth Chicago2 systemsOak Brook2 systemsSpringfield2 systemsAddison1 systemsAlgonquin1 systemsAlsip1 systemsAlton1 systemsAntioch1 systemsArlington Heights1 systemsAurora1 systemsBarrington1 systemsBartlett1 systemsBatavia1 systemsBellwood1 systemsBelvidere1 systemsBensenville1 systemsBerwyn1 systemsBethalto1 systemsBloomington1 systemsBlue Island1 systemsBolingbrook1 systemsBridgeview1 systemsBrookfield1 systemsBuffalo Grove1 systemsBurbank (South Stickney)1 systemsBurr Ridge1 systemsCahokia1 systemsCalumet City1 systemsCanton1 systemsCarbondale1 systemsCarol Stream1 systemsCarpentersville1 systemsCary1 systemsCaseyville1 systemsCentralia1 systemsChampaign1 systemsChannahon1 systemsChatham1 systemsChicago Heights1 systemsChicago Ridge1 systemsCicero1 systemsColeta1 systemsCollinsville1 systemsColumbia1 systemsCountry Club Hills1 systemsCrest Hill1 systemsCrestwood1 systemsCrystal Lake1 systemsDanville1 systemsDarien1 systemsDe Kalb1 systemsDecatur1 systemsDeerfield1 systemsDes Plaines1 systemsDixon1 systemsDolton1 systemsDowners Grove1 systemsEast Moline1 systemsEast St Louis1 systemsEdwardsville1 systemsElgin1 systemsElk Grove1 systemsElmhurst1 systemsElmwood Park1 systemsEvanston1 systemsEvergreen Park1 systemsFox Lake1 systemsFrankfort1 systemsFranklin Park1 systemsFreeport1 systemsGalesburg1 systemsGeneva1 systemsGlen Carbon1 systemsGlen Ellyn1 systemsGlendale Heights1 systemsGlenview1 systemsGranite City1 systemsGrays Lake1 systemsGurnee1 systemsHanover Park1 systemsHarvey1 systemsHazel Crest1 systemsHerrin1 systemsHickory Hills1 systemsHighland Park1 systemsHinsdale1 systemsHoffman Estates1 systemsHomewood1 systemsHuntley1 systemsJacksonville1 systemsJoliet1 systemsJustice1 systemsKankakee1 systemsKewanee1 systemsLa Grange1 systemsLa Grange Park1 systemsLake Forest1 systemsLake In The Hills1 systemsLake Zurich1 systemsLansing1 systemsLemont1 systemsLibertyville1 systemsLincoln1 systemsLincolnwood1 systemsLindenhurst1 systemsLisle1 systemsLockport1 systemsLombard1 systemsLoves Park1 systemsLyons1 systemsMachesney Park1 systemsMacomb1 systemsMarkham1 systemsMaryville1 systemsMatteson1 systemsMattoon1 systemsMaywood1 systemsMchenry1 systemsMelrose Park1 systemsMidlothian1 systemsMinooka1 systemsMokena1 systemsMoline1 systemsMontgomery1 systemsMorris1 systemsMorton1 systemsMorton Grove1 systemsMount Prospect1 systemsMount Vernon1 systemsMundelein1 systemsMurphysboro1 systemsNaperville1 systemsNew Lenox1 systemsNiles1 systemsNorridge1 systemsNorth Aurora1 systemsNorth Lake1 systemsNorthbrook1 systemsO Fallon1 systemsOak Forest1 systemsOak Lawn1 systemsOak Park1 systemsOrland Park1 systemsOswego1 systemsOttawa1 systemsPalatine1 systemsPalos Heights1 systemsPalos Hills1 systemsPark Forest1 systemsPark Ridge1 systemsPekin1 systemsPeoria1 systemsPeru1 systemsPlainfield1 systemsPlano1 systemsPontiac1 systemsQuincy1 systemsRantoul1 systemsRichton Park1 systemsRiver Forest1 systemsRiver Grove1 systemsRiverdale1 systemsRock Island1 systemsRockford1 systemsRolling Meadows1 systemsRomeoville1 systemsRoselle1 systemsRound Lake1 systemsRound Lake Beach1 systemsSaint Charles1 systemsSchaumburg1 systemsSchiller Park1 systemsShorewood1 systemsSkokie1 systemsSouth Elgin1 systemsSouth Holland1 systemsStreamwood1 systemsStreator1 systemsSugar Grove1 systemsSummit1 systemsSycamore1 systemsTaylorville1 systemsTinley Park1 systemsTroy1 systemsUrbana1 systemsVernon Hills1 systemsVilla Park1 systemsWarrenville1 systemsWashington1 systemsWaterloo1 systemsWauconda1 systemsWaukegan1 systemsWest Chicago1 systemsWestchester1 systemsWestern Springs1 systemsWestmont1 systemsWeston1 systemsWheaton1 systemsWheeling1 systemsWilmette1 systemsWinnetka1 systemsWood Dale1 systemsWood River1 systemsWoodridge1 systemsWoodstock1 systemsWorth1 systemsYorkville1 systemsZion1 systems
03 / COUNTY REPORTS
Illinois county water-system reports
Illinois has 70 county reports meeting the publication threshold for covered systems or reported population served.
Cook113 systemsLake40 systemsDuPage32 systemsWill21 systemsKane19 systemsMadison19 systemsMcHenry13 systemsSt. Clair11 systemsLaSalle8 systemsSangamon8 systemsTazewell8 systemsWilliamson8 systemsRock Island7 systemsWinnebago7 systemsChampaign6 systemsDeKalb6 systemsFranklin6 systemsMarion6 systemsClinton5 systemsColes5 systemsJackson5 systemsMacoupin5 systemsMcLean5 systemsGrundy4 systemsHenry4 systemsMacon4 systemsMorgan4 systemsOgle4 systemsPeoria4 systemsRandolph4 systemsVermilion4 systemsWhiteside4 systemsWoodford4 systemsAdams3 systemsClark3 systemsDouglas3 systemsJefferson3 systemsKendall3 systemsKnox3 systemsLee3 systemsLivingston3 systemsMcDonough3 systemsMonroe3 systemsSaline3 systemsBond2 systemsBoone2 systemsBureau2 systemsChristian2 systemsCrawford2 systemsEffingham2 systemsFayette2 systemsFord2 systemsGreene2 systemsHamilton2 systemsHancock2 systemsJasper2 systemsJersey2 systemsKankakee2 systemsLawrence2 systemsMassac2 systemsMenard2 systemsMontgomery2 systemsMoultrie2 systemsPerry2 systemsPike2 systemsStephenson2 systemsWashington2 systemsWayne2 systemsFulton1 systemsLogan1 systems