County · South Dakota
Brown County, South Dakota: drinking water records
This overview covers 14 ZIP codes and 22 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 |
|---|---|---|---|---|---|
| Aberdeen SD4600020 | 27,989 | 120 | 1 | 7 | 3 ppb |
| Web Water Development Association SD4601089 | 20,750 | 120 | 0 | 0 | 2 ppb |
| Brown-Day-Marshall Rws SD4600882 | 5,673 | 60 | 0 | 0 | 2 ppb |
| Prairiewood Property Owners SD4602125 | 300 | 0 | 0 | 2 | 1 ppb |
| Hecla SD4600152 | 200 | 0 | 0 | 1 | 2 ppb |
| Jobee Acres SD4600019 | 108 | 0 | 0 | 2 | 2 ppb |
| Stratford SD4600408 | 57 | 0 | 0 | 1 | 1 ppb |
| Groton SD4600147 | 1,380 | 0 | 0 | 0 | 3 ppb |
| Warner SD4600418 | 485 | 0 | 0 | 0 | 1 ppb |
| Lakeside Estates SD4600022 | 460 | 0 | 0 | 0 | 1 ppb |
| Country Village Park SD4600021 | 340 | 0 | 0 | 0 | 1 ppb |
| Frederick SD4600133 | 215 | 0 | 0 | 0 | 2 ppb |
| Claremont SD4600090 | 108 | 0 | 0 | 0 | 6 ppb |
| Pleasant Valley Estates SD4600404 | 105 | 0 | 0 | 0 | 1 ppb |
| Long Lake Colony SD4602051 | 100 | 0 | 0 | 0 | 0 ppb |
| Hutterville Colony South Dakota INC SD4602026 | 90 | 0 | 0 | 0 | 1 ppb |
| Northwood First Subdivision SD4602342 | 90 | 0 | 0 | 0 | 1 ppb |
| Westport Sanitary District SD4600179 | 88 | 0 | 0 | 0 | 2 ppb |
| Rolling Meadows SD4600620 | 83 | 0 | 0 | 0 | 2 ppb |
| The Meadows SD4600023 | 80 | 0 | 0 | 0 | 1 ppb |
| Richmond Heights Homeowners Associat SD4600504 | 67 | 0 | 0 | 0 | 2 ppb |
| Green Acres Association SD4600425 | 55 | 0 | 0 | 0 | 1 ppb |
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.