WILLIAMSTOWN BORO AUTH
PWS ID: PA7220037 · WILLIAMSTOWN, Pennsylvania 17098
Population Served
2,390
Total Violations
325
Health-Based Violations
0
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 926
- County
- Dauphin
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 286
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 40 | 2022 |
| Chlorine | MR | 27 | 2022 |
| Interim Enhanced Surface Water Treatment Rule | MR | 20 | 2014 |
| TTHM | MR | 17 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 17 | 2023 |
| Coliform (TCR) | MR | 12 | 2007 |
| CARBON, TOTAL | MR | 11 | 2025 |
| Public Notice | Other | 10 | 2007 |
| Nitrate | MR | 10 | 2007 |
| Consumer Confidence Rule | Other | 9 | 2007 |
| Arsenic | MR | 9 | 2007 |
| Styrene | MR | 7 | 2007 |
| Revised Total Coliform Rule | MON | 6 | 2023 |
| DICHLOROMETHANE | MR | 5 | 2007 |
| Barium | MR | 5 | 1993 |
| Chromium | MR | 5 | 1993 |
| Fluoride | MR | 5 | 1993 |
| Mercury | MR | 5 | 1993 |
| Selenium | MR | 5 | 1993 |
| Cadmium | MR | 5 | 1993 |
| cis-1,2-Dichloroethylene | MR | 4 | 2007 |
| Xylenes, Total | MR | 4 | 2007 |
| o-Dichlorobenzene | MR | 4 | 2007 |
| p-Dichlorobenzene | MR | 4 | 2007 |
| trans-1,2-Dichloroethylene | MR | 4 | 2007 |
| 1,1,1-Trichloroethane | MR | 4 | 2007 |
| Carbon tetrachloride | MR | 4 | 2007 |
| 1,1,2-Trichloroethane | MR | 4 | 2007 |
| Toluene | MR | 4 | 2007 |
| Ethylbenzene | MR | 4 | 2007 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.