COPPER OAKS I
PWS ID: SD4602136 · NEW UNDERWOOD, South Dakota 57761
Population Served
64
Total Violations
52
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 23
- County
- Pennington
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 48
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 4 | 2023 |
| Revised Total Coliform Rule | MON | 3 | 2023 |
| cis-1,2-Dichloroethylene | MR | 2 | 1998 |
| Ethylbenzene | MR | 2 | 1998 |
| 1,2,4-Trichlorobenzene | MR | 2 | 1998 |
| Xylenes, Total | MR | 2 | 1998 |
| Carbon tetrachloride | MR | 2 | 1998 |
| o-Dichlorobenzene | MR | 2 | 1998 |
| trans-1,2-Dichloroethylene | MR | 2 | 1998 |
| 1,2-Dichloropropane | MR | 2 | 1998 |
| p-Dichlorobenzene | MR | 2 | 1998 |
| 1,2-Dichloroethane | MR | 2 | 1998 |
| Toluene | MR | 2 | 1998 |
| CHLOROBENZENE | MR | 2 | 1998 |
| Styrene | MR | 2 | 1998 |
| Tetrachloroethylene | MR | 2 | 1998 |
| Vinyl chloride | MR | 2 | 1998 |
| 1,1,2-Trichloroethane | MR | 2 | 1998 |
| Trichloroethylene | MR | 2 | 1998 |
| 1,1-Dichloroethylene | MR | 2 | 1998 |
| Benzene | MR | 2 | 1998 |
| Chlorine | MR | 2 | 2024 |
| 1,1,1-Trichloroethane | MR | 2 | 1998 |
| DICHLOROMETHANE | MR | 2 | 1998 |
| Coliform (TCR) | MR | 1 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.