County · Wisconsin
Vernon County, Wisconsin: drinking water records
This overview covers 10 ZIP codes and 14 community water systems in Vernon County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| Viroqua Waterworks WI6630263 | 4,362 | 180 | 0 | 0 | 4.4 ppb |
| Westby Waterworks WI6630267 | 2,400 | 0 | 0 | 1 | 1.5 ppb |
| Hillsboro Waterworks WI6630257 | 1,325 | 0 | 0 | 8 | 3.2 ppb |
| Stoddard Waterworks WI6630262 | 793 | 0 | 0 | 3 | 0 ppb |
| Coon Valley Waterworks WI6630252 | 765 | 0 | 0 | 1 | 0 ppb |
| Ontario Waterworks WI6630259 | 554 | 0 | 0 | 1 | 1.3 ppb |
| Readstown Waterworks WI6630261 | 395 | 0 | 0 | 2 | 1.5 ppb |
| Genoa Waterworks WI6630254 | 264 | 0 | 0 | 4 | 7.8 ppb |
| Edgewood Mobile Home Park WI6630268 | 90 | 0 | 0 | 1 | 3.4 ppb |
| La Farge Waterworks WI6630258 | 712 | 0 | 0 | 0 | 0 ppb |
| Viola Waterworks WI6630269 | 667 | 0 | 0 | 0 | 1.2 ppb |
| Chaseburg Waterworks Village of WI6630251 | 306 | 0 | 0 | 0 | 2.8 ppb |
| Marell Courts and Rentals LLC WI6630256 | 60 | 0 | 0 | 0 | 0.8 ppb |
| Pine Crest Resort 2-Upper Well WI6630442 | 51 | 0 | 0 | 0 | not reported |
ZIP reports in Vernon 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: 54624.
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.