County · Wisconsin
Iowa County, Wisconsin: drinking water records
This overview covers 11 ZIP codes and 15 community water systems in Iowa 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 |
|---|---|---|---|---|---|
| Dodgeville Waterworks WI1250079 | 4,583 | 240 | 0 | 0 | 1.4 ppb |
| Mineral Point Waterworks WI1250084 | 2,487 | 0 | 0 | 3 | 37 ppb |
| Barneveld Waterworks WI1250075 | 1,258 | 0 | 0 | 3 | 1.9 ppb |
| Arena Waterworks WI1250073 | 877 | 60 | 0 | 0 | 1.1 ppb |
| Ridgeway Waterworks WI1250087 | 690 | 0 | 0 | 2 | 3.5 ppb |
| Avoca Waterworks WI1250074 | 545 | 0 | 0 | 2 | 0 ppb |
| House on the Rock Resort WI1250318 | 470 | 0 | 0 | 1 | 9.3 ppb |
| Cobb Waterworks WI1250076 | 458 | 0 | 0 | 1 | 0 ppb |
| Rewey Waterworks WI1250086 | 290 | 0 | 0 | 1 | 0 ppb |
| Hollandale Waterworks WI1250081 | 283 | 0 | 0 | 1 | 0 ppb |
| Highland Waterworks WI1250080 | 842 | 0 | 0 | 0 | 0 ppb |
| Linden Waterworks WI1250082 | 547 | 0 | 0 | 0 | 4.3 ppb |
| Edmund Tn of Linden San Dist 1 WI1250238 | 110 | 0 | 0 | 0 | 0 ppb |
| Bit O Green LLC MHP WI1250207 | 49 | 0 | 0 | 0 | 1.9 ppb |
| Zweifels Country View WI1250272 | 40 | 0 | 0 | 0 | 0.7 ppb |
ZIP reports in Iowa 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.