HERMOSA WATER USERS ASSOCIATION
PWS ID: SD4602180 · HERMOSA, South Dakota 57744
Population Served
108
Total Violations
102
Health-Based Violations
18
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 49
- County
- Custer
- School/Daycare
- No
- MCL Violations
- 16
- Monitoring Violations
- 74
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 20 | 2013 |
| Coliform (TCR) | MCL | 9 | 2005 |
| Lead and Copper Rule | MR | 9 | 2021 |
| Coliform (TCR) | Other | 8 | 2000 |
| Combined Radium (-226 and -228) | MCL | 4 | 2001 |
| Revised Total Coliform Rule | MCL | 3 | 2017 |
| Revised Total Coliform Rule | MON | 3 | 2019 |
| cis-1,2-Dichloroethylene | MR | 2 | 1999 |
| Vinyl chloride | MR | 2 | 1999 |
| 1,1,1-Trichloroethane | MR | 2 | 1999 |
| Ethylbenzene | MR | 2 | 1999 |
| DICHLOROMETHANE | MR | 2 | 1999 |
| 1,2,4-Trichlorobenzene | MR | 2 | 1999 |
| 1,1,2-Trichloroethane | MR | 2 | 1999 |
| Xylenes, Total | MR | 2 | 1999 |
| 1,1-Dichloroethylene | MR | 2 | 1999 |
| Carbon tetrachloride | MR | 2 | 1999 |
| Styrene | MR | 2 | 1999 |
| 1,2-Dichloropropane | MR | 2 | 1999 |
| Benzene | MR | 2 | 1999 |
| p-Dichlorobenzene | MR | 2 | 1999 |
| Toluene | MR | 2 | 1999 |
| Tetrachloroethylene | MR | 2 | 1999 |
| o-Dichlorobenzene | MR | 2 | 1999 |
| CHLOROBENZENE | MR | 2 | 1999 |
| Trichloroethylene | MR | 2 | 1999 |
| 1,2-Dichloroethane | MR | 2 | 1999 |
| trans-1,2-Dichloroethylene | MR | 2 | 1999 |
| Revised Total Coliform Rule | TT | 2 | 2019 |
| Public Notice | Other | 1 | 2001 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.