Public Water Systems
5,117 active public water systems in IL, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Wyanet | Wyanet, IL | 886 | 120 | - |
| Gateway MHP | Frankfort, IL | 884 | 11 | - |
| Prairie Path Water Company-Coventry Hill | McHenry, IL | 882 | 12 | - |
| Shabbona | Shabbona, IL | 881 | 83 | - |
| Piper City | Piper City, IL | 875 | 44 | - |
| Clifton Central High School | Ashkum, IL | 875 | 49 | - |
| Ridgway | Ridgway, IL | 874 | 90 | - |
| Lawrence County Correctional Center | Dieterich, IL | 870 | 20 | - |
| Paw Paw | Paw Paw, IL | 870 | 73 | - |
| Sharpsburg and Neighboring Area Water Sy | Stonington, IL | 868 | 8 | - |
| Prairie Path Water Company-Holiday Hills | McHenry, IL | 868 | 19 | - |
| Tallula | Tallula, IL | 868 | 17 | - |
| Lakewood Shores Improvement Association | Wilmington, IL | 868 | 248 | - |
| Ilur Liberty Commons MHP LLC | Crofton, IL | 865 | 2 | - |
| Wee-MA-Tuk Water District | Cuba, IL | 863 | 2 | Detected |
| Hanover | Hanover, IL | 863 | 27 | Clean |
| East Galesburg | East Galesburg, IL | 860 | 40 | - |
| Dahlgren | Dahlgren, IL | 859 | 11 | - |
| Brimfield | Brimfield, IL | 856 | 52 | - |
| Aqua Illinois-Crystal Clear Water Co. | Kankakee, IL | 855 | 418 | - |
| Prairie Path Water Company-Clarendon | St. Charles, IL | 850 | 27 | Clean |
| Dunfermline-St David Water Commission | St David, IL | 850 | 59 | - |
| St Bede Church | Waukegan, IL | 850 | 0 | - |
| Cissna Park | Cissna Park, IL | 846 | 41 | - |
| Albany | Albany, IL | 846 | 115 | - |
| Hanaford | Logan, IL | 845 | 8 | - |
| Hardin County Water District No.1 | Cave-IN-Rock, IL | 843 | 337 | - |
| Annawan | Peru, IL | 843 | 42 | - |
| IL American-Hardin | Godfrey, IL | 839 | 82 | - |
| Chandlerville | Chandlerville, IL | 838 | 148 | - |
| South Palmyra Water Commission | Palmyra, IL | 838 | 39 | - |
| Newman | Newman, IL | 836 | 135 | - |
| Alexis | Alexis, IL | 836 | 73 | - |
| Adams County Water District No 1 | Paloma, IL | 833 | 93 | - |
| Prairie Path Water Company-Cherry Hill | St. Charles, IL | 833 | 21 | - |
| Hopedale | Hopedale, IL | 830 | 11 | - |
| Yates City | Yates City, IL | 828 | 103 | - |
| IL American-Livingston | Godfrey, IL | 825 | 13 | - |
| Sheffield | Kewanee, IL | 821 | 52 | - |
| Exeter-Merritt Water Coop | Winchester, IL | 820 | 63 | - |
| West Salem | West Salem, IL | 819 | 31 | - |
| Round Prairie Water Coop | Dieterich, IL | 813 | 6 | - |
| Loami | Loami, IL | 812 | 27 | - |
| Aldi #92 | Batavia, IL | 812 | 0 | - |
| Constellation Dresden Station | Morris, IL | 811 | 13 | - |
| Glenbrook SD | Techny, IL | 809 | 27 | - |
| Blairsville Pwd | Hurst, IL | 807 | 31 | - |
| Noble | Noble, IL | 805 | 26 | - |
| Elizabeth | Elizabeth, IL | 802 | 22 | - |
| Shannon | Shannon, IL | 801 | 391 | - |