Wisconsin · population 2,961
Lead pipes in Williams Bay, WI
7 lead or galvanized lines to replace
Most of Williams Bay (population 2,961) gets its water from Williams Bay Waterworks. That system reported 4 lead and 3 galvanized-requiring-replacement service lines out of 1,933, with 1,112 more of unknown material.
0.4% of Williams Bay Waterworks's service lines are lead or galvanized requiring replacement, lower than the Wisconsin average (11%) and lower than the national average (3.1%).
- Lead 0.2%
- Galvanized (replace) 0.2%
- Unknown 58%
- Non-lead 42%
Latest lead test for Williams Bay Waterworks (Jan 2026–Jun 2026): 45 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists 7 Lead and Copper Rule violations since 2015, 1 health-based, 2 still open for Williams Bay Waterworks.
Water systems serving Williams Bay
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Williams Bay WaterworksMain system | 4 | 3 | 1,112 | 0.4% |
| Inspiration Ministries & Meadows AptsServes nearby areas | 0 | 0 | 8 | 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 Williams Bay
The counts above cover the whole water system. To see whether your line is lead, look up your address on Williams Bay 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
- Fontana-on-Geneva Lake1,085 unknown
- Walworth441 lead + galv. lines
- Delavan626 lead + galv. lines
- Lake Geneva424 lead + galv. lines
- Bloomfieldno lead reported
- Genoa199 lead + galv. lines
- Burlington498 lead + galv. lines
- Twin Lakes122 unknown
Check another water system
Questions
Does Williams Bay, WI have lead pipes?
Yes. Williams Bay Waterworks, which serves Williams Bay, reported 4 lead and 3 galvanized-requiring-replacement service lines, plus 1,112 of unknown material.
Who supplies water to Williams Bay?
EPA's service area maps place most of Williams Bay in Williams Bay Waterworks's service area (PWSID WI2650060). Inspiration Ministries & Meadows Apts also serves parts of the city or nearby areas.
How do I check whether my Williams Bay home has a lead service line?
Search your address on Williams Bay 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 Williams Bay 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 Williams Bay Waterworks whether your street is scheduled and whether it covers the private side.