WALNUT VALLEY WATER DISTRICT
PWSID: CA1910234 · WALNUT, CA · Serving 100,941 people
Type: CWSOwner: LSource: SW
Settlement eligible
Settlement details
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Upgrade to ProCompliant
All PFAS compounds below EPA Maximum Contaminant Levels.
Key contaminants vs MCL
EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31
Exact contamination levels
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Upgrade to ProDetection summary
50.1 ppt
Highest single detection
2024-09-16
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 232 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| NMeFOSAA | ND | — | Below MRL | 2024-03-11 |
| HFPO-DA | ND | 10 | Below MRL | 2024-03-11 |
| NEtFOSAA | ND | — | Below MRL | 2024-03-11 |
| PFTrDA | ND | — | Below MRL | 2024-03-11 |
| PFTA | ND | — | Below MRL | 2024-03-11 |