County · Illinois
Brown County, Illinois: drinking water records
This overview covers 3 ZIP codes and 5 community water systems in Brown County. It also stands in for 0 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 |
|---|---|---|---|---|---|
| Mount Sterling IL0090100 | 3,271 | 0 | 0 | 0 | 0 ppb |
| Versailles IL0090200 | 478 | 0 | 0 | 0 | 7.8 ppb |
| Ripley IL0090150 | 250 | 0 | 0 | 0 | 0 ppb |
| Mound Station IL0090050 | 122 | 0 | 0 | 0 | 0 ppb |
| Western Il Correctional Center IL0090010 | 1,600 | 0 | 0 | 0 | not reported |
ZIP reports in Brown County
No ZIP report in this county is published yet.
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.