OACOMA
PWS ID: SD4600229 · OACOMA, South Dakota 57365
Population Served
386
Total Violations
48
Health-Based Violations
37
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 190
- County
- Lyman
- School/Daycare
- No
- MCL Violations
- 31
- Monitoring Violations
- 6
- Treatment Tech Violations
- 6
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 23 | 2013 |
| Total Haloacetic Acids (HAA5) | MCL | 8 | 2012 |
| CARBON, TOTAL | TT | 6 | 2012 |
| Coliform (TCR) | MR | 2 | 1996 |
| Nitrate | MR | 2 | 1993 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.