HERMOSA-OLD SYSTEM
PWS ID: SD4600154 · HERMOSA, South Dakota 57744
Population Served
420
Total Violations
37
Health-Based Violations
2
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 277
- County
- Custer
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 24
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 10 | 2006 |
| Coliform (TCR) | MR | 4 | 1995 |
| Combined Radium (-226 and -228) | MR | 3 | 2021 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 2021 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 2 | 2010 |
| Combined Uranium | MR | 2 | 2021 |
| Revised Total Coliform Rule | MON | 2 | 2025 |
| Consumer Confidence Rule | Other | 2 | 2004 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.