Mahwah Water Department
PWSID NJ0233001 · Mahwah, New Jersey · serves 26,777 people · surface water source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOA | 12.5 ppt | 4 ppt | 7/8/2025 |
| PFOA | 11.8 ppt | 4 ppt | 4/9/2025 |
| PFOA | 10.4 ppt | 4 ppt | 1/14/2025 |
| PFOA | 8.7 ppt | 4 ppt | 10/2/2024 |
| PFOA | 8.4 ppt | 4 ppt | 10/29/2024 |
| PFOA | 8.2 ppt | 4 ppt | 10/29/2024 |
| PFOA | 8.1 ppt | 4 ppt | 4/9/2025 |
| PFOA | 7.2 ppt | 4 ppt | 5/28/2025 |
| PFHxA | 6.1 ppt | — | 7/8/2025 |
| PFPeA | 6.1 ppt | — | 7/8/2025 |
| PFBA | 6 ppt | — | 4/9/2025 |
| PFBA | 6 ppt | — | 7/8/2025 |
| PFHxA | 5.7 ppt | — | 4/9/2025 |
| PFBA | 5.6 ppt | — | 1/14/2025 |
| PFPeA | 5.6 ppt | — | 4/9/2025 |
| PFHxA | 5.5 ppt | — | 1/14/2025 |
| PFPeA | 5.4 ppt | — | 1/14/2025 |
| PFBA | 5.1 ppt | — | 10/29/2024 |
| PFBA | 5 ppt | — | 4/9/2025 |
| PFOS | 4.5 ppt | 4 ppt | 4/9/2025 |
| PFPeA | 4.4 ppt | — | 10/2/2024 |
| PFHxA | 4.4 ppt | — | 10/2/2024 |
| PFOS | 4.3 ppt | 4 ppt | 10/29/2024 |
| PFOS | 4.3 ppt | 4 ppt | 10/29/2024 |
| PFOS | 4.1 ppt | 4 ppt | 5/28/2025 |
| PFBS | 4.1 ppt | — | 7/8/2025 |
| PFPeA | 3.9 ppt | — | 10/29/2024 |
| PFHpA | 3.9 ppt | — | 7/8/2025 |
| PFPeA | 3.8 ppt | — | 10/29/2024 |
| PFHxA | 3.7 ppt | — | 10/29/2024 |
| PFPeA | 3.7 ppt | — | 4/9/2025 |
| PFHpA | 3.6 ppt | — | 1/14/2025 |
| PFBS | 3.6 ppt | — | 1/14/2025 |
| PFHpA | 3.6 ppt | — | 4/9/2025 |
| PFHxA | 3.5 ppt | — | 10/29/2024 |
| PFBS | 3.5 ppt | — | 4/9/2025 |
| PFPeA | 3.3 ppt | — | 5/28/2025 |
| PFHxA | 3.3 ppt | — | 4/9/2025 |
| PFHxA | 3 ppt | — | 5/28/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2023-01-01 | 1,2,4-Trichlorobenzene | MR | No | Resolved |
| 2023-01-01 | cis-1,2-Dichloroethylene | MR | No | Resolved |
| 2023-01-01 | Xylenes, Total | MR | No | Resolved |
| 2023-01-01 | DICHLOROMETHANE | MR | No | Resolved |
| 2023-01-01 | o-Dichlorobenzene | MR | No | Resolved |
| 2023-01-01 | p-Dichlorobenzene | MR | No | Resolved |
| 2023-01-01 | Vinyl chloride | MR | No | Resolved |
| 2023-01-01 | 1,1-Dichloroethylene | MR | No | Resolved |
| 2023-01-01 | trans-1,2-Dichloroethylene | MR | No | Resolved |
| 2023-01-01 | 1,2-Dichloroethane | MR | No | Resolved |
| 2023-01-01 | 1,1,1-Trichloroethane | MR | No | Resolved |
| 2023-01-01 | Carbon tetrachloride | MR | No | Resolved |
| 2023-01-01 | 1,2-Dichloropropane | MR | No | Resolved |
| 2023-01-01 | Trichloroethylene | MR | No | Resolved |
| 2023-01-01 | 1,1,2-Trichloroethane | MR | No | Resolved |
| 2023-01-01 | Tetrachloroethylene | MR | No | Resolved |
| 2023-01-01 | CHLOROBENZENE | MR | No | Resolved |
| 2023-01-01 | Benzene | MR | No | Resolved |
| 2023-01-01 | Toluene | MR | No | Resolved |
| 2023-01-01 | Ethylbenzene | MR | No | Resolved |
| 2023-01-01 | Styrene | MR | No | Resolved |