County · South Dakota
Marshall County, South Dakota: drinking water records
This overview covers 6 ZIP codes and 9 community water systems in Marshall 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 |
|---|---|---|---|---|---|
| Web Water Development Association SD4601089 | 20,750 | 120 | 0 | 0 | 2 ppb |
| Brown-Day-Marshall Rws SD4600882 | 5,673 | 60 | 0 | 0 | 2 ppb |
| Eden SD4600113 | 94 | 0 | 0 | 1 | 2 ppb |
| Britton SD4600388 | 1,215 | 0 | 0 | 0 | 2 ppb |
| Veblen SD4600341 | 317 | 0 | 0 | 0 | 1 ppb |
| Langford SD4600189 | 283 | 0 | 0 | 0 | 2 ppb |
| Sunset Colony SD4602025 | 140 | 0 | 0 | 0 | 1 ppb |
| Lake City SD4600186 | 45 | 0 | 0 | 0 | 1 ppb |
| Amherst Water Company SD4600030 | 40 | 0 | 0 | 0 | 2 ppb |
ZIP reports in Marshall 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.