Wisconsin · population 67,242
Lead pipes in Oshkosh, WI
6,718 lead or galvanized lines to replace
Most of Oshkosh (population 67,242) gets its water from Oshkosh Waterworks. That system reported 6,471 lead and 247 galvanized-requiring-replacement service lines out of 22,505, with 5,067 more of unknown material.
30% of Oshkosh 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 29%
- Galvanized (replace) 1.1%
- Unknown 23%
- Non-lead 48%
Latest lead test for Oshkosh Waterworks (Jan 2025–Jun 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 Oshkosh Waterworks.
Water systems serving Oshkosh
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Oshkosh WaterworksMain system | 6,471 | 247 | 5,067 | 30% |
| Algoma TN Sanitary Dist 1Also serves parts of the city | 0 | 0 | 0 | 0% |
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 Oshkosh
The counts above cover the whole water system. To see whether your line is lead, look up your address on Oshkosh 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
- Neenah3,318 lead + galv. lines
- Fox Crossingno lead reported
- Menasha12 unknown
- North Fond du Lac166 lead + galv. lines
- Harrisonno lead reported
- Sherwoodno lead reported
- Greenvilleno lead reported
- Fond du Lac3,172 lead + galv. lines
Check another water system
Questions
Does Oshkosh, WI have lead pipes?
Yes. Oshkosh Waterworks, which serves Oshkosh, reported 6,471 lead and 247 galvanized-requiring-replacement service lines, plus 5,067 of unknown material.
Who supplies water to Oshkosh?
EPA's service area maps place most of Oshkosh in Oshkosh Waterworks's service area (PWSID WI4710457). Algoma TN Sanitary Dist 1 also serves parts of the city or nearby areas.
How do I check whether my Oshkosh home has a lead service line?
Search your address on Oshkosh 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 Oshkosh 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 Oshkosh Waterworks whether your street is scheduled and whether it covers the private side.