ONIDA
PWS ID: SD4600233 · ONIDA, South Dakota 57564
Population Served
658
Total Violations
139
Health-Based Violations
42
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 410
- County
- Sully
- School/Daycare
- No
- MCL Violations
- 42
- Monitoring Violations
- 66
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 45 | 2003 |
| Coliform (TCR) | MCL | 33 | 1997 |
| Coliform (TCR) | Other | 13 | 1998 |
| Lead and Copper Rule | MR | 9 | 2000 |
| Combined Radium (-226 and -228) | MCL | 8 | 1997 |
| Combined Radium (-226 and -228) | MR | 5 | 1996 |
| Gross Alpha, Excl. Radon and U | MR | 5 | 1996 |
| Consumer Confidence Rule | Other | 4 | 2002 |
| Lead and Copper Rule | Other | 2 | 2001 |
| Asbestos | MR | 2 | 1993 |
| Public Notice | Other | 1 | 2004 |
| Fluoride | MCL | 1 | 1980 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.