Fond Du Lac Waterworks, WI Water Quality
Fond Du Lac Waterworks: EPA violation history, explained
Fond Du Lac Waterworks had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 44,678 people get their water from it, across 16,049 connections.
Ranked against every other system in this dataset
113 total violations and 23 health-based ones put Fond Du Lac Waterworks at the 94th percentile nationally for violation burden, rank 768 of 12,903.
How Fond Du Lac Waterworks compares within WI
Among the 259 WI systems in this dataset, the average is 5.4 health-based violations - Fond Du Lac Waterworks's 23 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for Fond Du Lac Waterworks is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
Fond Du Lac Waterworks's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Lead & copper - flagged from: Lead and Copper Rule Revisions
- Radionuclides - flagged from: Combined Radium (-226 and -228); Gross Alpha, Excl. Radon and U
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
Everything on this page is Fond Du Lac Waterworks's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 23 health-based violations on file for Fond Du Lac Waterworks - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.