Water report · not indexed
What is in the water at 53188
2 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
PEWAUKEE CITY WATER AND SEWER UTILITY
PWSID WI2680214 · WI · serves 8,671 people · service area inferred by a model, not supplied by the state
PFAS and lithium
11 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 45 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 11 µg/L | 4 | 6/24/2024 |
| PFHxS | 0.069 µg/L | 6 | 6/24/2024 |
| PFHxA | 0.04 µg/L | 5 | 6/24/2024 |
| 6:2 FTS | 0.035 µg/L | 4 | 6/24/2024 |
| PFBS | 0.027 µg/L | 4 | 6/24/2024 |
| PFPeA | 0.024 µg/L | 6 | 6/24/2024 |
| PFPeS | 0.021 µg/L | 4 | 6/24/2024 |
| PFBA | 0.013 µg/L | 2 | 6/24/2024 |
| PFOS | 0.012 µg/L | 4 | 6/24/2024 |
| PFOA | 0.0085 µg/L | 3 | 6/24/2024 |
| PFHpA | 0.008 µg/L | 3 | 6/24/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
11 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- MCL · contaminant code 4010 · began 2019-07-01
- MCL · contaminant code 4000 · began 2023-10-01
- MCL · contaminant code 4000 · began 2024-01-01
- MCL · contaminant code 4000 · began 2024-04-01
- MCL · contaminant code 4000 · began 2024-07-01
- MCL · contaminant code 4000 · began 2024-10-01
- MCL · contaminant code 4000 · began 2025-01-01
- MCL · contaminant code 4000 · began 2025-04-01
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
WAUKESHA WATER UTILITY
PWSID WI2680238 · WI · serves 70,718 people
PFAS and lithium
Sampled, nothing detected. Tested for 30 compounds under UCMR 5 with none found at or above its reporting limit. A reporting limit is the lowest concentration the method can measure, so this means “below that” rather than “zero”.
Health-based violations
23 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- MCL · contaminant code 4030 · began 2016-01-01
- MCL · contaminant code 4030 · began 2016-01-01
- MCL · contaminant code 4030 · began 2016-04-01
- MCL · contaminant code 4030 · began 2016-04-01
- MCL · contaminant code 4030 · began 2016-07-01
- MCL · contaminant code 4030 · began 2016-10-01
- MCL · contaminant code 4030 · began 2017-01-01
- MCL · contaminant code 4030 · began 2017-04-01
Hardness
Too few readings to state a hardness. 4 station(s), 4 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your water.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01 · 1 of 2 service areas here are modelled.