County · Illinois
Sangamon County, Illinois: drinking water records
This overview covers 26 ZIP codes and 33 community water systems in Sangamon County. It also stands in for 1 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Springfield IL1671200 | 117,444 | 120 | 1 | 0 | 0 ppb |
| Chatham IL1670300 | 16,423 | 60 | 0 | 0 | 0 ppb |
| Curran-Gardner Township Pwd IL1675350 | 6,651 | 60 | 0 | 0 | 0 ppb |
| Williamsville IL1671300 | 6,198 | 120 | 0 | 0 | 0 ppb |
| Auburn IL1670050 | 4,574 | 120 | 0 | 0 | 2.7 ppb |
| Riverton IL1670950 | 4,279 | 60 | 0 | 0 | 2 ppb |
| Rochester IL1671000 | 3,856 | 120 | 0 | 0 | 5.6 ppb |
| New Berlin IL1670800 | 1,380 | 0 | 0 | 1 | 0 ppb |
| Illiopolis IL1670550 | 1,037 | 0 | 0 | 4 | 4.2 ppb |
| Ej Water-Sangchris IL1670230 | 1,025 | 0 | 0 | 4 | 0 ppb |
| Pawnee IL1670850 | 2,700 | 0 | 0 | 0 | 4.6 ppb |
| Dawson IL1670400 | 2,375 | 0 | 0 | 0 | 0 ppb |
| Jerome IL1670600 | 1,600 | 0 | 0 | 0 | 0 ppb |
| Pleasant Plains IL1670900 | 1,508 | 0 | 0 | 0 | 5.4 ppb |
| Grandview IL1670500 | 1,405 | 0 | 0 | 0 | 0 ppb |
| Mechanicsburg-Buffalo Water Commission IL1675150 | 1,170 | 0 | 0 | 0 | 0 ppb |
| Divernon IL1670450 | 1,100 | 0 | 0 | 0 | 0 ppb |
| Grand Valley Village MHP IL1670070 | 912 | 0 | 0 | 0 | 0 ppb |
| Round Prairie Water Coop IL1670090 | 813 | 0 | 0 | 0 | 1.5 ppb |
| Loami IL1670700 | 812 | 0 | 0 | 0 | 1.5 ppb |
| Sugar Crk Pwd IL1675300 | 754 | 0 | 0 | 0 | 0 ppb |
| Thayer IL1671250 | 721 | 0 | 0 | 0 | 0 ppb |
| Oakwood Estates IL1670060 | 420 | 0 | 0 | 0 | 0 ppb |
| Cottonwood Cove MHP IL1670200 | 358 | 0 | 0 | 0 | 0 ppb |
| Forrest Park MHP IL1670225 | 352 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Sangamon County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 62515.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.