Water report · not indexed
What is in the water at 54474
2 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
SCHOFIELD WATERWORKS
PWSID WI7370162 · WI
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 16 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBS | 0.011 µg/L | 4 | 5/17/2023 |
| PFPeA | 0.0098 µg/L | 2 | 5/17/2023 |
| PFHxA | 0.0078 µg/L | 2 | 5/17/2023 |
| PFHxS | 0.0062 µg/L | 4 | 5/17/2023 |
| PFBA | 0.0053 µg/L | 2 | 5/17/2023 |
| PFOA | 0.0047 µg/L | 2 | 5/17/2023 |
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
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
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.
WESTON MUNICIPAL UTILITIES
PWSID WI7370163 · WI · serves 16,000 people · service area inferred by a model, not supplied by the state
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 29 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFBS | 0.022 µg/L | 8 | 8/26/2025 |
| PFOS | 0.013 µg/L | 4 | 8/26/2025 |
| PFOA | 0.0059 µg/L | 4 | 8/26/2025 |
| PFHxS | 0.0058 µg/L | 9 | 8/26/2025 |
| PFBA | 0.0054 µg/L | 1 | 8/26/2025 |
| 6:2 FTS | 0.0052 µg/L | 1 | 2/13/2025 |
| PFPeA | 0.0045 µg/L | 1 | 8/26/2025 |
| PFHxA | 0.0036 µg/L | 1 | 8/26/2025 |
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
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
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.
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.