Jefferson Twp W U Lk Hop
PWSID NJ1414011 · Lake Hopatcong, New Jersey · serves 8,500 people · groundwater source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 9.8 ppt | 4 ppt | 8/12/2025 |
| PFOS | 8.6 ppt | 4 ppt | 2/11/2025 |
| PFOA | 8.3 ppt | 4 ppt | 8/12/2025 |
| PFPeA | 7.6 ppt | — | 8/12/2025 |
| PFOA | 7.5 ppt | 4 ppt | 2/11/2025 |
| PFPeA | 7.1 ppt | — | 2/11/2025 |
| PFBS | 7 ppt | — | 8/12/2025 |
| PFOA | 6.4 ppt | 4 ppt | 8/12/2025 |
| PFBS | 6.2 ppt | — | 2/11/2025 |
| PFOA | 5.6 ppt | 4 ppt | 2/11/2025 |
| PFPeA | 4.5 ppt | — | 8/12/2025 |
| PFHxA | 4.3 ppt | — | 8/12/2025 |
| PFBS | 4.2 ppt | — | 8/12/2025 |
| PFPeA | 4.1 ppt | — | 2/11/2025 |
| PFHxA | 3.9 ppt | — | 2/11/2025 |
| PFHxA | 3.6 ppt | — | 8/12/2025 |
| PFBS | 3.4 ppt | — | 2/11/2025 |
| PFHxA | 3.2 ppt | — | 2/11/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-10-11 | Revised Total Coliform Rule | RPT | No | Resolved |
| 2025-09-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2025-07-11 | Revised Total Coliform Rule | RPT | No | Resolved |
| 2025-06-21 | Public Notice | Other | No | Resolved |
| 2025-06-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2025-01-01 | Lead and Copper Rule | TT | Yes | Archived |
| 2025-01-01 | Lead and Copper Rule | MR | No | Archived |
| 2024-12-10 | Revised Total Coliform Rule | RPT | No | Resolved |
| 2024-09-19 | Revised Total Coliform Rule | TT | Yes | Resolved |
| 2024-07-17 | E. COLI | MR | No | Resolved |
| 2024-07-01 | Lead and Copper Rule | MR | No | Archived |
| 2024-07-01 | Lead and Copper Rule | TT | Yes | Archived |
| 2024-06-19 | E. COLI | MR | No | Resolved |
| 2024-06-19 | E. COLI | MR | No | Resolved |
| 2024-05-10 | Public Notice | Other | No | Resolved |
| 2024-03-31 | Lead and Copper Rule | MR | No | Resolved |
| 2024-01-11 | Revised Total Coliform Rule | RPT | No | Resolved |
| 2024-01-01 | Lead and Copper Rule | TT | Yes | Archived |
| 2024-01-01 | Lead and Copper Rule | MR | No | Archived |
| 2023-12-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2023-10-18 | E. COLI | MR | No | Resolved |
| 2023-10-11 | Revised Total Coliform Rule | RPT | No | Resolved |
| 2023-10-06 | Public Notice | Other | No | Resolved |
| 2023-10-01 | Chlorine | MR | No | Resolved |
| 2023-09-29 | Lead and Copper Rule | MR | No | Resolved |
| 2023-09-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2023-07-01 | Consumer Confidence Rule | Other | No | Resolved |
| 2023-07-01 | Lead and Copper Rule | TT | Yes | Archived |
| 2023-07-01 | Lead and Copper Rule | MR | No | Resolved |
| 2023-06-18 | Public Notice | Other | No | Resolved |
| 2023-04-01 | Lead and Copper Rule | MR | No | Resolved |
| 2023-04-01 | Chlorine | MR | No | Resolved |
| 2023-01-06 | Public Notice | Other | No | Resolved |
| 2023-01-01 | Chlorine | MR | No | Resolved |
| 2023-01-01 | Chlorine | MR | No | Archived |
| 2023-01-01 | Chlorine | MR | No | Archived |
| 2023-01-01 | Lead and Copper Rule | TT | Yes | Archived |
| 2023-01-01 | Lead and Copper Rule | MR | No | Resolved |
| 2022-10-01 | Chlorine | MR | No | Resolved |
| 2022-10-01 | Chlorine | MR | No | Resolved |
| 2022-10-01 | Chlorine | MR | No | Resolved |
| 2022-09-29 | Lead and Copper Rule | MR | No | Resolved |
| 2022-07-01 | Lead and Copper Rule | MR | No | Resolved |
| 2022-07-01 | Lead and Copper Rule | TT | Yes | Archived |
| 2022-01-01 | Lead and Copper Rule | TT | Yes | Archived |