HIDDEN VALLEY WATER ASSOCIATION INC
PWS ID: SD4600269 · RAPID CITY, South Dakota 57702
Population Served
27
Total Violations
64
Health-Based Violations
18
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 15
- County
- Pennington
- School/Daycare
- No
- MCL Violations
- 14
- Monitoring Violations
- 40
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 14 | 1999 |
| Chlorine | MR | 8 | 2021 |
| Coliform (TCR) | MR | 6 | 2015 |
| Revised Total Coliform Rule | MON | 5 | 2024 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 4 | 2017 |
| E. COLI | MR | 3 | 2015 |
| Arsenic | MR | 2 | 1988 |
| Barium | MR | 2 | 1988 |
| Chromium | MR | 2 | 1988 |
| Fluoride | MR | 2 | 1988 |
| Mercury | MR | 2 | 1988 |
| Nitrate | MR | 2 | 1988 |
| Selenium | MR | 2 | 1988 |
| Cadmium | MR | 2 | 1988 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.