County · Wisconsin
St. Croix County, Wisconsin: drinking water records
This overview covers 11 ZIP codes and 12 community water systems in St. Croix 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 |
|---|---|---|---|---|---|
| Hudson Waterworks WI6560087 | 18,558 | 420 | 1 | 1 | 6.1 ppb |
| New Richmond Waterworks WI6560126 | 10,824 | 300 | 1 | 0 | 1.5 ppb |
| Baldwin Waterworks WI6560119 | 4,440 | 120 | 0 | 0 | 1 ppb |
| Somerset Waterworks WI6560137 | 3,334 | 0 | 0 | 1 | 1.8 ppb |
| Wilson Waterworks WI6560259 | 170 | 0 | 0 | 2 | 3.5 ppb |
| New Richmond Estates WI6560131 | 95 | 0 | 0 | 1 | 1 ppb |
| Hammond Waterworks WI6560121 | 1,884 | 0 | 0 | 0 | 0 ppb |
| Roberts Waterworks WI6560134 | 1,872 | 0 | 0 | 0 | 1 ppb |
| Woodville Waterworks WI6560138 | 1,386 | 0 | 0 | 0 | 0.7 ppb |
| Glenwood City Waterworks WI6560120 | 1,102 | 0 | 0 | 0 | 0 ppb |
| Star Prairie Waterworks WI6560141 | 553 | 0 | 0 | 0 | 0.4 ppb |
| Wall Street Village WI6560886 | 191 | 0 | 0 | 0 | 0 ppb |
ZIP reports in St. Croix 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: 54007.
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.