Milwaukee County tap water
0 of 14 water systems serving Milwaukee County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 18 community water systems list this county as served; 14 serve 3,300+ people with full PFAS testing.
- 1 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Milwaukee Waterworks | Surface water | 626,000 | No | 0 |
| West Allis Waterworks | Purchased surface water | 63,240 | No | 0 |
| Wauwatosa Waterworks | Purchased surface water | 49,064 | No | 0 |
| North Shore Water Commission | Surface water | 35,598 | No | 0 |
| Oak Creek Waterworks | Surface water | 32,104 | No | 1 |
| Franklin Water Utility | Purchased surface water | 22,500 | No | 0 |
| South Milwaukee Waterworks | Surface water | 21,340 | No | 0 |
| Cudahy Waterworks | Surface water | 18,659 | No | 0 |
| Greendale Waterworks | Purchased surface water | 14,393 | No | 0 |
| Whitefish Bay Waterworks | Purchased surface water | 14,272 | No | 0 |
| Shorewood Waterworks | Purchased surface water | 13,535 | No | 0 |
| Glendale Waterworks | Purchased surface water | 12,883 | No | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.