Community Water System (CWS) · WI6180230
Groundwater · serves an estimated 70,587 people · across Eau Claire Waterworks
No numeric score yet
sampled 2024
f-eau claire waterworks-pfoa
src-ucmr5-2024 · released 2026-01-15
The original published file, referenced from the source record.
Not detected in the 2024 UCMR5 round.
Why it matters. Studies associate PFOA exposure with effects on the immune system, cholesterol, liver, and developmental outcomes, and with certain cancers. Because it accumulates, the EPA has set the enforceable limit near the lowest reliably measurable level.
Understand Perfluorooctanoic acid (PFOA) →| Substance | Result | Reference | Sampled | Status | Evidence |
|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | 2024 | Not detected | View evidence |
| Perfluorooctane sulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | 2024 | Not detected | View evidence |
| Perfluorohexane sulfonic acid (PFHxS) | 11 ng/L | 10.0 ng/L federal MCL (2024) | 2024 | Above guideline | View evidence |
| Lead (90th percentile) | 4 µg/L | 15 µg/L federal action level | 2022-2022 | Below limit | View evidence |
A federal limit (an MCL or action level) is an enforceable legal cap. A health goal (an MCLG or health benchmark) is a non-enforceable target, often stricter, sometimes zero. A system meeting the legal limit is a compliance fact; it is not a guarantee of no health concern. PurityMap publishes no overall compliance verdict for a system; read each finding against its own reference below.
EAU CLAIRE WATERWORKS (PWS ID WI6180230) is a public water system serving 70,587 people in Eau Claire Waterworks, Wisconsin.
EAU CLAIRE WATERWORKS is on record as drawing from groundwater. The source shapes which contaminants matter most for this system.
PurityMap's record for EAU CLAIRE WATERWORKS shows 1 finding measured above a benchmark and 3 within benchmark, from 4 evidence records. Every finding links to its source; a substance that was never monitored is shown as pending, not as a pass.
PurityMap does not issue a safety verdict. It publishes EAU CLAIRE WATERWORKS's measured results against each contaminant's benchmark so you can read them in context. Safety depends on the specific finding, your plumbing, and how the water reaches your tap.
The latest published record for EAU CLAIRE WATERWORKS is dated 2026-09-16. Utilities report on regulatory cycles, so results reflect the monitoring period rather than a live reading.