OAKS WATER USERS ASSOCIATION
PWS ID: SD4602135 · NEW UNDERWOOD, South Dakota 57761
Population Served
180
Total Violations
166
Health-Based Violations
8
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 73
- County
- Pennington
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 157
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 8 | 2001 |
| Coliform (TCR) | MCL | 6 | 1999 |
| Lead and Copper Rule | MR | 4 | 1994 |
| LASSO | MR | 3 | 1993 |
| Atrazine | MR | 3 | 1993 |
| Di(2-ethylhexyl) adipate | MR | 3 | 1993 |
| Endrin | MR | 3 | 1993 |
| BHC-GAMMA | MR | 3 | 1993 |
| Chlordane | MR | 3 | 1993 |
| Toxaphene | MR | 3 | 1993 |
| Simazine | MR | 3 | 1993 |
| Aldicarb | MR | 3 | 1993 |
| Aldicarb sulfone | MR | 3 | 1993 |
| Aldicarb sulfoxide | MR | 3 | 1993 |
| OXAMYL | MR | 3 | 1993 |
| Dinoseb | MR | 3 | 1993 |
| 2,4,5-TP | MR | 3 | 1993 |
| 2,4-D | MR | 3 | 1993 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 1993 |
| ETHYLENE DIBROMIDE | MR | 3 | 1993 |
| Glyphosate | MR | 3 | 1993 |
| Diquat | MR | 3 | 1993 |
| Nitrate | MR | 3 | 1994 |
| Heptachlor | MR | 3 | 1993 |
| Picloram | MR | 3 | 1993 |
| Heptachlor epoxide | MR | 3 | 1993 |
| Benzo(a)pyrene | MR | 3 | 1993 |
| HEXACHLOROBENZENE | MR | 3 | 1993 |
| Carbofuran | MR | 3 | 1993 |
| Endothall | MR | 3 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.