County · Wisconsin
Fond du Lac County, Wisconsin: drinking water records
This overview covers 15 ZIP codes and 15 community water systems in Fond du Lac 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 |
|---|---|---|---|---|---|
| Fond Du Lac Waterworks WI4200469 | 44,678 | 240 | 0 | 1 | 6.1 ppb |
| Ripon Water Utility WI4200476 | 7,716 | 240 | 0 | 1 | 3.5 ppb |
| North Fond Du Lac Waterworks WI4200405 | 5,414 | 60 | 0 | 2 | 9.1 ppb |
| Fond Du Lac Tn Water Utility WI4200429 | 980 | 0 | 0 | 1 | 3.6 ppb |
| Campbellsport Waterworks WI4200461 | 1,825 | 0 | 0 | 0 | 1.1 ppb |
| Oakfield Waterworks WI4200475 | 1,058 | 0 | 0 | 0 | 0 ppb |
| Ashwood Grove Edgewater WI4200485 | 1,046 | 0 | 0 | 0 | 1.6 ppb |
| Brandon Waterworks WI4200402 | 872 | 0 | 0 | 0 | 6.9 ppb |
| St Cloud Waterworks WI4200477 | 494 | 0 | 0 | 0 | 1.9 ppb |
| Mount Calvary Waterworks WI4200474 | 478 | 0 | 0 | 0 | 0.5 ppb |
| Fairwater Waterworks WI4200463 | 365 | 0 | 0 | 0 | 1.8 ppb |
| Mary Hill Park Sanitary Dist WI4200465 | 65 | 0 | 0 | 0 | 7.9 ppb |
| Country Aire Mobile Home Park WI4200490 | 60 | 0 | 0 | 0 | 0 ppb |
| Colonial Gardens Homes WI4200484 | 48 | 0 | 0 | 0 | 0 ppb |
| Elmore Heights Trailer Court WI4200489 | 30 | 0 | 0 | 0 | 6.7 ppb |
ZIP reports in Fond du Lac 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: 54932, 54974, 54979.
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.