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 |
|---|---|---|---|---|
| Greenfield | Greenfield, IL | 1,480 | 258 | - |
| Mount Carroll | Mt Carroll, IL | 1,479 | 92 | - |
| North Pekin | North Pekin, IL | 1,478 | 22 | - |
| Bethany | Bethany, IL | 1,475 | 17 | - |
| Hodgkins | Hodgkins, IL | 1,472 | 18 | - |
| Garden Home SD | Garden Homes, IL | 1,472 | 44 | - |
| Green Oaks | Green Oaks, IL | 1,470 | 24 | - |
| Four Seasons MHP | Provo, IL | 1,468 | 52 | - |
| Silvis Heights Water Corp | Silvis, IL | 1,450 | 147 | - |
| Exxon Mobil Oil Refinery | Joliet, IL | 1,450 | 372 | - |
| Cat Tech Center | Chillicothe, IL | 1,442 | 461 | - |
| Oakbrook Terrace | Oakbrook Terrace, IL | 1,440 | 4 | - |
| Crystal Lawns Addition Improvement Assoc | Joliet, IL | 1,435 | 227 | Detected |
| Cerro Gordo | Cerro Gordo, IL | 1,433 | 4 | - |
| South Fulton Water District | Astoria, IL | 1,430 | 18 | - |
| Devils Kitchen Water District | Carbondale, IL | 1,428 | 52 | - |
| Durand | Durand, IL | 1,427 | 83 | - |
| Wynstone Water Company | Geneva, IL | 1,424 | 318 | - |
| York Township Water System | Darien, IL | 1,423 | 172 | - |
| Gridley | Gridley, IL | 1,411 | 21 | - |
| Pembroke Township | Hopkins Park, IL | 1,410 | 102 | - |
| Onarga | Onarga, IL | 1,409 | 33 | - |
| Grandview | Springfield, IL | 1,405 | 26 | - |
| Murrayville-Woodson Water Commission | Murrayville, IL | 1,403 | 62 | - |
| Sunset MHP | Northbrook, IL | 1,400 | 298 | - |
| North Utica | Utica, IL | 1,400 | 254 | - |
| Centralia Correctional Site | Centralia, IL | 1,397 | 6 | - |
| Colchester | Colchester, IL | 1,395 | 172 | - |
| Nilwood | Modesto, IL | 1,394 | 85 | - |
| IL American-Rosiclare | Godfrey, IL | 1,387 | 6 | - |
| Payson | Payson, IL | 1,386 | 42 | - |
| New Berlin | New Berlin, IL | 1,380 | 241 | - |
| Aqua Illinois-Philo | Kankakee, IL | 1,378 | 9 | - |
| Astoria | Astoria, IL | 1,375 | 17 | - |
| IL American-Hardin County | Godfrey, IL | 1,373 | 18 | - |
| Tower Lakes | Volo, IL | 1,372 | 208 | - |
| Hebron | Hebron, IL | 1,368 | 11 | - |
| Gardner | Gardner, IL | 1,361 | 322 | - |
| Hilltop MHP | Bloomington, IL | 1,360 | 92 | - |
| Granville | Granville, IL | 1,359 | 392 | - |
| Toluca | Toluca, IL | 1,348 | 79 | - |
| Capron | Capron, IL | 1,343 | 268 | - |
| Riverdale School District #100 | Port Byron, IL | 1,340 | 356 | - |
| Forreston | Forreston, IL | 1,338 | 9 | - |
| Bonnie Brae Forest Manor Sndst | Lockport, IL | 1,338 | 14 | - |
| Ashland | Ashland, IL | 1,333 | 127 | - |
| Rossville | Rossville, IL | 1,331 | 120 | - |
| Warren | Warren, IL | 1,323 | 25 | - |
| Harristown | Decatur, IL | 1,320 | 34 | - |
| East Moreland Wtr Service Assn | Joliet, IL | 1,320 | 154 | - |