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Pewaukee, WI Tap Water Quality 2026

Water quality report for Pewaukee, WI — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Pewaukee's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Pewaukee Village Waterworks PWSID: WI2680229 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS was sampled but not enough times for a compliance determination.

B

Pewaukee earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: not detected
PFAS sampled, too few results to judge
42 violations since 2015, 23 health-based
No violations currently open
Pewaukee's lead level vs. all Wisconsin community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Wisconsin utilities
Population Served
4484
~3024 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
42 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.55 PCI/L 5 pCi/L 2026 Archived
Public Notice OTHER — — 2025 Unaddressed
Public Notice OTHER — — 2025 Unaddressed
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.46 PCI/L 5 pCi/L 2025 Archived
Public Notice OTHER — — 2025 Unaddressed
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.76 PCI/L 5 pCi/L 2025 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 16.27 PCI/L 15 pCi/L 2025 Archived
Combined Radium (-226 and -228) MCL EXCEEDANCE 8.28 PCI/L 5 pCi/L 2025 Archived
Public Notice OTHER — — 2025 Unaddressed
Public Notice OTHER — — 2025 Unaddressed
Public Notice OTHER — — 2025 Unaddressed
Public Notice OTHER — — 2025 Unaddressed
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 17.75 PCI/L 15 pCi/L 2025 Archived
Combined Radium (-226 and -228) MCL EXCEEDANCE 8.02 PCI/L 5 pCi/L 2025 Archived
Combined Radium (-226 and -228) MCL EXCEEDANCE 8.32 PCI/L 5 pCi/L 2024 Archived
Public Notice OTHER — — 2024 Unaddressed
Public Notice OTHER — — 2024 Resolved
Public Notice OTHER — — 2024 Unaddressed
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 18.3 PCI/L 15 pCi/L 2024 Archived
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.35 PCI/L 5 pCi/L 2024 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 16.87 PCI/L 15 pCi/L 2024 Archived
Public Notice OTHER — — 2024 Unaddressed
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 15.67 PCI/L 15 pCi/L 2024 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 18 PCI/L 15 pCi/L 2023 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 17.2033 PCI/L 15 pCi/L 2023 Archived
Public Notice OTHER — — 2023 Unaddressed
Public Notice OTHER — — 2023 Unaddressed
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 18.8783 PCI/L 15 pCi/L 2023 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 19.3783 PCI/L 15 pCi/L 2023 Archived
Public Notice OTHER — — 2022 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 20.25 PCI/L 15 pCi/L 2022 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 19.33 PCI/L 15 pCi/L 2022 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 18.28 PCI/L 15 pCi/L 2022 Archived
Public Notice OTHER — — 2022 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 17.58 PCI/L 15 pCi/L 2022 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 15.9 PCI/L 15 pCi/L 2021 Archived
Public Notice OTHER — — 2021 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 16.75 PCI/L 15 pCi/L 2021 Archived
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2020 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2019 Resolved
Radium-226 MONITORING AND REPORTING — — 2019 Resolved
Radium-228 MONITORING AND REPORTING — — 2019 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

42 violations are on record since 2015, of which 23 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Pewaukee Village Waterworks
PWSID WI2680229
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 4,484
Service connections 3,024
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Pewaukee tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Pewaukee water have PFAS? ▼
It was sampled, but no sampling point had enough results for a compliance determination.
Who supplies water to Pewaukee? ▼
Pewaukee Village Waterworks (PWSID WI2680229), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-03-17. No significant deficiencies were recorded.

What Should Pewaukee Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Wisconsin

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