WENHAM WATER DEPT.
PWS ID: MA3320000 · WENHAM, Massachusetts 01984
PFAS Detected
5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
3,942
Total Violations
23
Health-Based Violations
14
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,249
- County
- Essex
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 6
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 12 | 2011 |
| Lead and Copper Rule | MR | 4 | 2015 |
| Coliform (TCR) | MR | 2 | 2009 |
| Lead and Copper Rule | TT | 2 | 1994 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 10 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFOA | 5/14/2024 | 0.0072 µg/L | 0.004 µg/L | Detected |
| 6:2 FTS | 5/14/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 5/14/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 5/14/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 5/14/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHxA | 5/14/2024 | 0.0067 µg/L | 0.003 µg/L | Detected |
| 4:2 FTS | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 5/14/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFOS | 5/14/2024 | 0.0064 µg/L | 0.004 µg/L | Detected |
| PFNA | 5/14/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 5/14/2024 | 0.0039 µg/L | 0.003 µg/L | Detected |
| lithium | 5/14/2024 | <9 µg/L | 9 µg/L | Not Detected |
| PFDoA | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 5/14/2024 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 5/14/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 5/14/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFTA | 5/14/2024 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| 8:2 FTS | 5/14/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFPeS | 5/14/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 5/14/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 5/14/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 5/14/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 5/14/2024 | 0.0068 µg/L | 0.003 µg/L | Detected |
| PFTrDA | 5/14/2024 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFDA | 11/6/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 11/6/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 11/6/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOS | 11/6/2024 | 0.0056 µg/L | 0.004 µg/L | Detected |
| HFPO-DA | 11/6/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 11/6/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 11/6/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 11/6/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 11/6/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFDoA | 11/6/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 11/6/2024 | 0.0052 µg/L | 0.004 µg/L | Detected |
| PFNA | 11/6/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 11/6/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 11/6/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 11/6/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 11/6/2024 | 0.0034 µg/L | 0.003 µg/L | Detected |
| 4:2 FTS | 11/6/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 11/6/2024 | 0.0052 µg/L | 0.003 µg/L | Detected |
| PFTA | 11/6/2024 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| 8:2 FTS | 11/6/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.