Gross alpha particles above the legal limit in the period starting January 2026.
Serves about 8,671 people (3,211 connections) with groundwater from its own wells.
From EPA's record for WI2680214. PurityMap is independent of Pewaukee City Water and Sewer Utility.
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17 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2026 | Gross alpha particles | 16.95 pCi/L | 15 pCi/L | Archived |
| From October 2025 | Gross alpha particles | 20.03 pCi/L | 15 pCi/L | Archived |
| From July 2025 | Gross alpha particles | 21.65 pCi/L | 15 pCi/L | Archived |
| From April 2025 | Gross alpha particles | 24.45 pCi/L | 15 pCi/L | Archived |
| From January 2025 | Gross alpha particles | 26.95 pCi/L | 15 pCi/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2024 | Gross alpha particles | 24.8 pCi/L | 15 pCi/L | Archived |
| From July 2024 | Gross alpha particles | 23.2 pCi/L | 15 pCi/L | Archived |
| From April 2024 | Gross alpha particles | 21.1 pCi/L | 15 pCi/L | Archived |
| From January 2024 | Gross alpha particles | 17.45 pCi/L | 15 pCi/L | Archived |
| From October 2023 | Gross alpha particles | 17.43 pCi/L | 15 pCi/L | Archived |
| From July 2019 | Combined radium-226/228 | 5.75325 pCi/L | 5 pCi/L | Archived |
| From April 2018 | Combined radium-226/228 | 5.61 pCi/L | 5 pCi/L | Resolved |
| From January 2018 | Combined radium-226/228 | 6.2 pCi/L | 5 pCi/L | Resolved |
| From October 2017 | Combined radium-226/228 | 6.2 pCi/L | 5 pCi/L | Resolved |
| From July 2017 | Combined radium-226/228 | 6.48 pCi/L | 5 pCi/L | Resolved |
| From April 2017 | Combined radium-226/228 | 5.94 pCi/L | 5 pCi/L | Resolved |
| From January 2017 | Combined radium-226/228 | 5.57 pCi/L | 5 pCi/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from June 2024 to December 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanesulfonic acid (PFHxS) | 69 ng/L | 10 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorooctanesulfonic acid (PFOS) | 12 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorooctanoic acid (PFOA) | 8.5 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Lithium | 11 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorobutanesulfonic acid (PFBS) | 27 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorohexanoic acid (PFHxA) | 40 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | 35 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorobutanoic acid (PFBA) | 13 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoroheptanoic acid (PFHpA) | 8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoropentanesulfonic acid (PFPeS) | 21 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoropentanoic acid (PFPeA) | 24 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-24 to 2024-12-18 | UCMR5 Analytical Results: PEWAUKEE CITY WATER AND SEWER UTILITY (WI2680214) |
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
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Follow this water →According to EPA's record, Pewaukee City Water and Sewer Utility uses groundwater from its own wells.
EPA's record shows 17 health-based violations for Pewaukee City Water and Sewer Utility in the 10 years to July 9, 2026. Gross alpha particles were above the legal limit in the period starting January 2026. EPA also lists 54 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Pewaukee City Water and Sewer Utility's latest lead and copper round, which ended in September 2023, was 2.6 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Pewaukee City Water and Sewer Utility. Its mailing address on EPA record is W240 N3065 PEWAUKEE RD, PEWAUKEE, WI 53072. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.