Downingtown Water Authority
PWSID PA1150026 · Downingtown, Pennsylvania · serves 9,900 people · surface water source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOA | 4.2 ppt | 4 ppt | 7/8/2024 |
| PFBS | 3.8 ppt | — | 4/24/2024 |
| PFBS | 3.7 ppt | — | 7/8/2024 |
| PFBS | 3.4 ppt | — | 1/22/2024 |
| PFPeA | 3.4 ppt | — | 7/8/2024 |
| PFHxA | 3.1 ppt | — | 7/8/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-09-01 | Interim Enhanced Surface Water Treatment Rule | MR | No | Archived |
| 2025-07-01 | TTHM | MR | No | Archived |
| 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 | 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 |
| 2022-04-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |