County · Michigan
Monroe County, Michigan: drinking water records
This overview covers 17 ZIP codes and 10 community water systems in Monroe 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 |
|---|---|---|---|---|---|
| Monroe MI0004450 | 49,467 | 120 | 0 | 1 | 2 ppb |
| Monroe South County MI0004455 | 33,816 | 120 | 0 | 0 | 1 ppb |
| Frenchtown Township MI0002500 | 21,609 | 120 | 1 | 0 | 1.9 ppb |
| Berlin Township MI0000635 | 9,900 | 120 | 0 | 0 | 0 ppb |
| Ash Township MI0000245 | 5,959 | 120 | 0 | 0 | 7.6 ppb |
| Dundee MI0001880 | 5,400 | 120 | 1 | 0 | 0 ppb |
| Sun Outdoors Sarasota FL6581741 | 3,800 | 60 | 0 | 0 | 0 ppb |
| South Rockwood MI0006130 | 1,587 | 0 | 0 | 0 | 0 ppb |
| Petersburg MI0005290 | 1,115 | 0 | 0 | 0 | 0 ppb |
| Whiteford Township MI0007063 | 303 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Monroe 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.