County · Wisconsin
Clark County, Wisconsin: drinking water records
This overview covers 14 ZIP codes and 12 community water systems in Clark County. It also stands in for 3 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 |
|---|---|---|---|---|---|
| Thorp Waterworks WI6100337 | 1,636 | 0 | 0 | 2 | 14 ppb |
| Dorchester Waterworks WI6100326 | 834 | 0 | 0 | 1 | 0 ppb |
| Clark County Rehabilitation & Living Center WI6100336 | 510 | 0 | 0 | 4 | 1.8 ppb |
| Granton Waterworks WI6100327 | 349 | 0 | 0 | 1 | 2.3 ppb |
| Neillsville Waterworks WI6100330 | 2,384 | 0 | 0 | 0 | 1.2 ppb |
| Loyal Waterworks WI6100329 | 1,308 | 0 | 0 | 0 | 0 ppb |
| Greenwood Waterworks WI6100328 | 1,079 | 0 | 0 | 0 | 0 ppb |
| Owen Waterworks WI6100334 | 936 | 0 | 0 | 0 | 1.8 ppb |
| Withee Waterworks WI6100283 | 506 | 0 | 0 | 0 | 2.3 ppb |
| Curtiss Waterworks WI6100339 | 346 | 0 | 0 | 0 | 0.6 ppb |
| Grandview Mobile Home Court WI6100332 | 42 | 0 | 0 | 0 | 5.9 ppb |
| Village Acres Mobile Home Ct LLC WI6100340 | 32 | 0 | 0 | 0 | 1.2 ppb |
ZIP reports in Clark 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: 54420, 54493, 54746.
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.