WILLIAMSTOWN WATER DEPT
PWS ID: WV3305412 · WILLIAMSTOWN, West Virginia 26187
PFAS Detected
7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
3,469
Total Violations
95
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,567
- County
- Wood
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 74
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| LASSO | MR | 6 | 2014 |
| Groundwater Rule | TT | 5 | 2020 |
| Coliform (TCR) | MCL | 4 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 4 | 2008 |
| Picloram | MR | 4 | 2008 |
| Carbofuran | MR | 4 | 2008 |
| Atrazine | MR | 4 | 2008 |
| Heptachlor | MR | 4 | 2008 |
| Heptachlor epoxide | MR | 4 | 2008 |
| 2,4-D | MR | 4 | 2008 |
| Coliform (TCR) | MR | 4 | 2013 |
| Public Notice | Other | 4 | 2014 |
| Consumer Confidence Rule | Other | 4 | 2024 |
| Lead and Copper Rule | MR | 4 | 2024 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2008 |
| Hexachlorocyclopentadiene | MR | 4 | 2008 |
| Simazine | MR | 4 | 2008 |
| Total Polychlorinated Biphenyls (PCB) | MR | 4 | 2008 |
| BHC-GAMMA | MR | 4 | 2008 |
| Benzo(a)pyrene | MR | 4 | 2008 |
| OXAMYL | MR | 4 | 2008 |
| Chlordane | MR | 4 | 2008 |
| Groundwater Rule | Other | 2 | 2020 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 12 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFOA | 5/16/2023 | 0.0202 µg/L | 0.004 µg/L | Detected |
| 6:2 FTS | 5/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 5/16/2023 | 0.0060 µg/L | 0.005 µg/L | Detected |
| HFPO-DA | 5/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 5/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 5/16/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 5/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 5/16/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 5/16/2023 | 0.0091 µg/L | 0.003 µg/L | Detected |
| 4:2 FTS | 5/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 5/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NEtFOSAA | 5/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOS | 5/16/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 5/16/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 5/16/2023 | 0.0313 µg/L | 0.003 µg/L | Detected |
| PFHpA | 5/16/2023 | 0.0030 µg/L | 0.003 µg/L | Detected |
| PFBS | 5/16/2023 | 0.0094 µg/L | 0.003 µg/L | Detected |
| NMeFOSAA | 5/16/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 5/16/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| lithium | 5/16/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFDoA | 5/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 5/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 5/16/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 5/16/2023 | 0.0035 µg/L | 0.003 µg/L | Detected |
| PFMBA | 5/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 5/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 5/16/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 5/16/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 5/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 5/16/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| 9Cl-PF3ONS | 11/14/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 11/14/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 11/14/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 11/14/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 11/14/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 11Cl-PF3OUdS | 11/14/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFEESA | 11/14/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 11/14/2023 | 0.0320 µg/L | 0.004 µg/L | Detected |
| PFMBA | 11/14/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 11/14/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 11/14/2023 | 0.0052 µg/L | 0.003 µg/L | Detected |
| NFDHA | 11/14/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFDA | 11/14/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 11/14/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOS | 11/14/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 11/14/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 11/14/2023 | 0.0087 µg/L | 0.003 µg/L | Detected |
| PFHpA | 11/14/2023 | 0.0039 µg/L | 0.003 µg/L | Detected |
| PFBS | 11/14/2023 | 0.0074 µg/L | 0.003 µg/L | Detected |
| PFDoA | 11/14/2023 | <0.003 µg/L | 0.003 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.