Water report · not indexed
What is in the water at 95639
One public water system serves this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
SCWA - LAGUNA/VINEYARD
PWSID CA3410029 · CA · serves 184,896 people
PFAS and lithium
7 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 48 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFOS | 0.024 µg/L | 7 | 8/20/2024 |
| PFOA | 0.014 µg/L | 10 | 8/20/2024 |
| PFPeA | 0.0096 µg/L | 10 | 8/20/2024 |
| PFHxA | 0.0084 µg/L | 9 | 8/19/2024 |
| PFHxS | 0.0068 µg/L | 5 | 8/19/2024 |
| PFHpA | 0.0063 µg/L | 5 | 8/19/2024 |
| PFBS | 0.0048 µg/L | 2 | 8/19/2024 |
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
1 open health-based violation(s) recorded in SDWIS and not yet returned to compliance.
- TT · contaminant code 5200 · began 2024-10-17
Hardness
Median hardness 122 mg/L as CaCO₃, measured at 10 stations serving this system across 12 results, 2017-08-15 to 2022-11-29. Measured in the water source and distribution area, not at a tap, and not in your home.
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.