Wisconsin · population 44,469
Lead pipes in Fond du Lac, WI
3,172 lead or galvanized lines to replace
Most of Fond du Lac (population 44,469) gets its water from Fond Du Lac Waterworks. That system reported 3,116 lead and 56 galvanized-requiring-replacement service lines out of 16,049, with 377 more of unknown material.
20% of Fond Du Lac Waterworks's service lines are lead or galvanized requiring replacement, higher than the Wisconsin average (11%) and higher than the national average (3.1%).
- Lead 19%
- Galvanized (replace) 0.3%
- Unknown 2.3%
- Non-lead 78%
Latest lead test for Fond Du Lac Waterworks (Jul 2025–Dec 2025): 6.1 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Fond Du Lac Waterworks.
Water systems serving Fond du Lac
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Fond Du Lac WaterworksMain system | 3,116 | 56 | 377 | 20% |
| Ashwood Grove EdgewaterAlso serves parts of the city | 0 | 0 | 0 | 0% |
| Mary Hill Park Sanitary DistAlso serves parts of the city | 0 | 0 | 13 | 0% |
| North Fond Du Lac WaterworksServes nearby areas | 131 | 35 | 598 | 10% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in Fond du Lac
The counts above cover the whole water system. To see whether your line is lead, look up your address on Fond Du Lac Waterworks's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- North Fond du Lac166 lead + galv. lines
- Waupun388 lead + galv. lines
- Oshkosh6,718 lead + galv. lines
- New Holsteinno lead reported
- Kielno lead reported
- Plymouth809 lead + galv. lines
- Neenah3,318 lead + galv. lines
- West Bend703 lead + galv. lines
Check another water system
Questions
Does Fond du Lac, WI have lead pipes?
Yes. Fond Du Lac Waterworks, which serves Fond du Lac, reported 3,116 lead and 56 galvanized-requiring-replacement service lines, plus 377 of unknown material.
Who supplies water to Fond du Lac?
EPA's service area maps place most of Fond du Lac in Fond Du Lac Waterworks's service area (PWSID WI4200469). Ashwood Grove Edgewater, Mary Hill Park Sanitary Dist, North Fond Du Lac Waterworks also serve parts of the city or nearby areas.
How do I check whether my Fond du Lac home has a lead service line?
Search your address on Fond Du Lac Waterworks's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in Fond du Lac be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Fond Du Lac Waterworks whether your street is scheduled and whether it covers the private side.