D & E WATER COMPANY
PWS ID: SD4600392 · BLACK HAWK, South Dakota 57718
Population Served
100
Total Violations
87
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 40
- County
- Lawrence
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 67
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 23 | 2006 |
| Lead and Copper Rule | MR | 10 | 2000 |
| Coliform (TCR) | MR | 8 | 1997 |
| Coliform (TCR) | MCL | 5 | 2010 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 4 | 2006 |
| Arsenic | MR | 2 | 1991 |
| Fluoride | MR | 2 | 1991 |
| Mercury | MR | 2 | 1991 |
| Antimony, Total | MR | 2 | 1991 |
| Beryllium, Total | MR | 2 | 1991 |
| Nickel | MR | 2 | 1991 |
| Thallium, Total | MR | 2 | 1991 |
| Selenium | MR | 2 | 1991 |
| Consumer Confidence Rule | Other | 2 | 2001 |
| Cadmium | MR | 2 | 1991 |
| Barium | MR | 2 | 1991 |
| Nitrate | MR | 2 | 1993 |
| Chromium | MR | 2 | 1991 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Lead and Copper Rule | Other | 1 | 2001 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
| Coliform (TCR) | Other | 1 | 1997 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.