County · Wisconsin
Dunn County, Wisconsin: drinking water records
This overview covers 9 ZIP codes and 13 community water systems in Dunn County. It also stands in for 2 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 |
|---|---|---|---|---|---|
| Menomonie Waterworks WI6170268 | 15,950 | 180 | 0 | 0 | 1.3 ppb |
| Boyceville Waterworks WI6170260 | 1,043 | 0 | 0 | 1 | 0 ppb |
| Knapp Waterworks WI6170267 | 486 | 0 | 0 | 1 | 6 ppb |
| Wheeler Waterworks Assoc WI6170274 | 317 | 0 | 0 | 1 | 0 ppb |
| Tainter Woods Condominiums WI6170686 | 85 | 0 | 0 | 1 | 0.6 ppb |
| Shady Oaks MHP WI6170445 | 40 | 0 | 0 | 1 | 0.7 ppb |
| Colfax Waterworks WI6170261 | 1,102 | 0 | 0 | 0 | 0 ppb |
| Elk Mound Waterworks WI6170264 | 895 | 0 | 0 | 0 | 0.9 ppb |
| Downsville Sanitary District WI6170263 | 250 | 0 | 0 | 0 | 1 ppb |
| Marell Country Estates WI6170265 | 150 | 0 | 0 | 0 | 0 ppb |
| Cedar Falls Acres MHP WI6170271 | 95 | 0 | 0 | 0 | 0 ppb |
| River Villa Mobile Home Court WI6170385 | 60 | 0 | 0 | 0 | 0.5 ppb |
| Countryside Mobile Homes WI6170276 | 50 | 0 | 0 | 0 | 0.4 ppb |
ZIP reports in Dunn 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: 54734, 54737.
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.