OAK KNOLL EST MHP
PWS ID: PA7220001 · LEMOYNE, Pennsylvania 17043
Population Served
350
Total Violations
491
Health-Based Violations
21
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 102
- County
- Dauphin
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 438
- Treatment Tech Violations
- 20
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 46 | 2023 |
| Groundwater Rule | MR | 39 | 2024 |
| Chlorine | MR | 23 | 2017 |
| Groundwater Rule | TT | 20 | 2019 |
| Public Notice | Other | 20 | 2019 |
| Coliform (TCR) | MR | 17 | 2012 |
| 1,1-Dichloroethylene | MR | 14 | 2003 |
| 1,2-Dichloroethane | MR | 14 | 2003 |
| Carbon tetrachloride | MR | 14 | 2003 |
| Trichloroethylene | MR | 14 | 2003 |
| p-Dichlorobenzene | MR | 14 | 2003 |
| 1,1,1-Trichloroethane | MR | 14 | 2003 |
| Benzene | MR | 14 | 2003 |
| 1,2,4-Trichlorobenzene | MR | 12 | 2003 |
| DICHLOROMETHANE | MR | 12 | 2003 |
| 1,1,2-Trichloroethane | MR | 12 | 2003 |
| CHLOROBENZENE | MR | 12 | 2003 |
| Toluene | MR | 12 | 2003 |
| Xylenes, Total | MR | 12 | 2003 |
| 1,2-Dichloropropane | MR | 12 | 2003 |
| o-Dichlorobenzene | MR | 12 | 2003 |
| Tetrachloroethylene | MR | 12 | 2003 |
| Styrene | MR | 12 | 2003 |
| trans-1,2-Dichloroethylene | MR | 12 | 2003 |
| Ethylbenzene | MR | 12 | 2003 |
| cis-1,2-Dichloroethylene | MR | 12 | 2003 |
| Atrazine | MR | 8 | 2003 |
| Nitrite | MR | 8 | 2023 |
| Lead and Copper Rule | MR | 4 | 1994 |
| Diquat | MR | 4 | 2015 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.