SEWICKLEY BORO WATER AUTH
PWS ID: PA5020050 · SEWICKLEY, Pennsylvania 15143
PFAS Detected
5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
6,800
Total Violations
214
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,183
- County
- Allegheny
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 206
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Groundwater Rule | MR | 11 | 2024 |
| Di(2-ethylhexyl) phthalate | MR | 11 | 1995 |
| Hexachlorocyclopentadiene | MR | 11 | 1995 |
| Pentachlorophenol | MR | 11 | 1995 |
| Di(2-ethylhexyl) adipate | MR | 11 | 1995 |
| Benzo(a)pyrene | MR | 11 | 1995 |
| Aldicarb sulfoxide | MR | 11 | 1995 |
| Aldicarb sulfone | MR | 11 | 1995 |
| Chlorine | MR | 7 | 2021 |
| Xylenes, Total | MR | 5 | 2014 |
| DICHLOROMETHANE | MR | 4 | 2004 |
| o-Dichlorobenzene | MR | 4 | 2004 |
| p-Dichlorobenzene | MR | 4 | 2004 |
| 1,1-Dichloroethylene | MR | 4 | 2004 |
| 1,1,1-Trichloroethane | MR | 4 | 2004 |
| Carbon tetrachloride | MR | 4 | 2004 |
| Trichloroethylene | MR | 4 | 2004 |
| 1,1,2-Trichloroethane | MR | 4 | 2004 |
| Benzene | MR | 4 | 2004 |
| Toluene | MR | 4 | 2004 |
| Styrene | MR | 4 | 2004 |
| E. COLI | MR | 4 | 2011 |
| Combined Uranium | MR | 4 | 2011 |
| Radium-226 | MR | 4 | 2011 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2019 |
| TTHM | MR | 4 | 2019 |
| Lead and Copper Rule | MR | 4 | 2019 |
| Radium-228 | MR | 4 | 2011 |
| cis-1,2-Dichloroethylene | MR | 4 | 2004 |
| 1,2-Dichloroethane | MR | 4 | 2004 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 10 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 9Cl-PF3ONS | 6/21/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 6/21/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 6/21/2023 | 0.0066 µg/L | 0.005 µg/L | Detected |
| 6:2 FTS | 6/21/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 6/21/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 6/21/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 6/21/2023 | 0.0120 µg/L | 0.003 µg/L | Detected |
| PFPeS | 6/21/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFEESA | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 6/21/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFBS | 6/21/2023 | 0.0057 µg/L | 0.003 µg/L | Detected |
| PFTA | 6/21/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| 11Cl-PF3OUdS | 6/21/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 6/21/2023 | 0.0033 µg/L | 0.003 µg/L | Detected |
| PFHpS | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTrDA | 6/21/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NMeFOSAA | 6/21/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| lithium | 6/21/2023 | <9 µg/L | 9 µg/L | Not Detected |
| NEtFOSAA | 6/21/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpA | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 6/21/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFNA | 6/21/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 6/21/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 6/21/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 6/21/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 6/21/2023 | 0.0078 µg/L | 0.003 µg/L | Detected |
| NEtFOSAA | 12/13/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 12/13/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NMeFOSAA | 12/13/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFPeS | 12/13/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| lithium | 12/13/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFHpS | 12/13/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 12/13/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 12/13/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 12/13/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 12/13/2023 | 0.0070 µg/L | 0.003 µg/L | Detected |
| PFMPA | 12/13/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 12/13/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 12/13/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 12/13/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 12/13/2023 | 0.0054 µg/L | 0.005 µg/L | Detected |
| HFPO-DA | 12/13/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpA | 12/13/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 12/13/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| ADONA | 12/13/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 12/13/2023 | 0.0045 µg/L | 0.003 µg/L | 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.