WENHAM WATER DEPT.
PWSID: MA3320000 · WENHAM, MA · Serving 3,942 people
Type: CWSOwner: LSource: GW
Exceeds MCL
One or more PFAS compounds exceed EPA Maximum Contaminant Levels. Corrective action required by 2031.
Key contaminants vs MCL
PFOA7.2 ppt(MCL: 4 ppt)
PFOS6.4 ppt(MCL: 4 ppt)
EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31
Detection summary
5
PFAS compounds detected
7.2 ppt
Highest single detection
2024-05-14
Latest sample date
complete
Data completeness
All PFAS detection results
Source: EPA UCMR5 (UCMR5)
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|---|---|---|---|
| NEtFOSAA | ND | — | Below MRL | 2024-11-06 |
| 6:2 FTS | ND | — | Below MRL | 2024-05-14 |
| PFBA | ND | — | Below MRL | 2024-05-14 |
| HFPO-DA | ND | 10 | Below MRL | 2024-05-14 |
| ADONA | ND | — | Below MRL | 2024-05-14 |
| 11Cl-PF3OUdS | ND | — | Below MRL | 2024-05-14 |
| PFTA | ND | — | Below MRL | 2024-11-06 |
| 8:2 FTS | ND | — | Below MRL | 2024-11-06 |
| PFMPA | ND | — | Below MRL | 2024-11-06 |
| NMeFOSAA | ND | — | Below MRL | 2024-11-06 |
| PFTrDA | ND | — | Below MRL | 2024-11-06 |
| lithium | ND | — | Below MRL | 2024-11-06 |
| PFHpS | ND | — | Below MRL | 2024-11-06 |
| PFPeS | ND | — | Below MRL | 2024-11-06 |
| NFDHA | ND | — | Below MRL | 2024-11-06 |
| PFEESA | ND | — | Below MRL | 2024-11-06 |
| 4:2 FTS | ND | — | Below MRL | 2024-05-14 |
| PFDA | ND | — | Below MRL | 2024-05-14 |
| 9Cl-PF3ONS | ND | — | Below MRL | 2024-05-14 |
| PFNA | ND | 10 | Below MRL | 2024-05-14 |
| PFHxS | ND | 10 | Below MRL | 2024-05-14 |
| PFHpA | ND | — | Below MRL | 2024-05-14 |
| lithium | ND | — | Below MRL | 2024-05-14 |
| PFDoA | ND | — | Below MRL | 2024-05-14 |
| PFHpS | ND | — | Below MRL | 2024-05-14 |
| NMeFOSAA | ND | — | Below MRL | 2024-05-14 |
| NEtFOSAA | ND | — | Below MRL | 2024-05-14 |
| PFUnA | ND | — | Below MRL | 2024-05-14 |
| PFTA | ND | — | Below MRL | 2024-05-14 |
| 8:2 FTS | ND | — | Below MRL | 2024-05-14 |
| PFPeS | ND | — | Below MRL | 2024-05-14 |
| NFDHA | ND | — | Below MRL | 2024-05-14 |
| PFEESA | ND | — | Below MRL | 2024-05-14 |
| PFMBA | ND | — | Below MRL | 2024-05-14 |
| PFMPA | ND | — | Below MRL | 2024-05-14 |
| PFTrDA | ND | — | Below MRL | 2024-05-14 |
| PFDA | ND | — | Below MRL | 2024-11-06 |
| 6:2 FTS | ND | — | Below MRL | 2024-11-06 |
| PFBA | ND | — | Below MRL | 2024-11-06 |
| HFPO-DA | ND | 10 | Below MRL | 2024-11-06 |
| ADONA | ND | — | Below MRL | 2024-11-06 |
| 9Cl-PF3ONS | ND | — | Below MRL | 2024-11-06 |
| 11Cl-PF3OUdS | ND | — | Below MRL | 2024-11-06 |
| PFUnA | ND | — | Below MRL | 2024-11-06 |
| PFDoA | ND | — | Below MRL | 2024-11-06 |
| PFNA | ND | 10 | Below MRL | 2024-11-06 |
| PFHxS | ND | 10 | Below MRL | 2024-11-06 |
| PFHpA | ND | — | Below MRL | 2024-11-06 |
| PFMBA | ND | — | Below MRL | 2024-11-06 |
| 4:2 FTS | ND | — | Below MRL | 2024-11-06 |
| PFOA | 7.2 | 4 | Exceeds | 2024-05-14 |
| PFPeA | 6.8 | — | 2024-05-14 | |
| PFHxA | 6.7 | — | 2024-05-14 | |
| PFOS | 6.4 | 4 | Exceeds | 2024-05-14 |
| PFOS | 5.6 | 4 | Exceeds | 2024-11-06 |
| PFHxA | 5.2 | — | 2024-11-06 | |
| PFOA | 5.2 | 4 | Exceeds | 2024-11-06 |
| PFPeA | 4.9 | — | 2024-11-06 | |
| PFBS | 3.9 | — | 2024-05-14 | |
| PFBS | 3.4 | — | 2024-11-06 |