LONDONDERRY ELEM SCH
PWS ID: PA7220373 · HUMMELSTOWN, Pennsylvania 17036
Population Served
465
Total Violations
373
Health-Based Violations
15
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Dauphin
- School/Daycare
- Yes
- MCL Violations
- 15
- Monitoring Violations
- 347
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrite | MR | 33 | 2024 |
| Nitrate | MR | 26 | 2024 |
| Xylenes, Total | MR | 15 | 2001 |
| DICHLOROMETHANE | MR | 15 | 2001 |
| o-Dichlorobenzene | MR | 15 | 2001 |
| p-Dichlorobenzene | MR | 15 | 2001 |
| cis-1,2-Dichloroethylene | MR | 15 | 2001 |
| 1,2-Dichloroethane | MR | 13 | 2001 |
| 1,1,1-Trichloroethane | MR | 13 | 2001 |
| Carbon tetrachloride | MR | 13 | 2001 |
| 1,2-Dichloropropane | MR | 13 | 2001 |
| 1,1,2-Trichloroethane | MR | 13 | 2001 |
| Tetrachloroethylene | MR | 13 | 2001 |
| CHLOROBENZENE | MR | 13 | 2001 |
| Ethylbenzene | MR | 13 | 2001 |
| Styrene | MR | 13 | 2001 |
| 1,2,4-Trichlorobenzene | MR | 13 | 2001 |
| 1,1-Dichloroethylene | MR | 13 | 2001 |
| Benzene | MR | 13 | 2001 |
| Toluene | MR | 13 | 2001 |
| trans-1,2-Dichloroethylene | MR | 13 | 2001 |
| Trichloroethylene | MR | 13 | 2001 |
| Lead and Copper Rule | MR | 10 | 2016 |
| Benzene | MCL | 8 | 2003 |
| Nitrate | MCL | 7 | 2006 |
| Revised Total Coliform Rule | MON | 6 | 2025 |
| Public Notice | Other | 4 | 2006 |
| Coliform (TCR) | MR | 2 | 1997 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.