ISABEL
PWS ID: SD4600175 · ISABEL, South Dakota 57633
Population Served
145
Total Violations
299
Health-Based Violations
157
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 135
- County
- Dewey
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 110
- Treatment Tech Violations
- 148
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 146 | 1997 |
| Coliform (TCR) | MR | 18 | 2015 |
| Nitrate | MR | 9 | 2001 |
| Public Notice | Other | 9 | 2006 |
| Coliform (TCR) | MCL | 9 | 2008 |
| Vinyl chloride | MR | 3 | 1999 |
| 1,1,1-Trichloroethane | MR | 3 | 1999 |
| Tetrachloroethylene | MR | 3 | 1999 |
| 1,1,2-Trichloroethane | MR | 3 | 1999 |
| 1,1-Dichloroethylene | MR | 3 | 1999 |
| Styrene | MR | 3 | 1999 |
| p-Dichlorobenzene | MR | 3 | 1999 |
| 1,2-Dichloroethane | MR | 3 | 1999 |
| Toluene | MR | 3 | 1999 |
| Antimony, Total | MR | 3 | 2001 |
| Nickel | MR | 3 | 2001 |
| Beryllium, Total | MR | 3 | 2001 |
| cis-1,2-Dichloroethylene | MR | 3 | 1999 |
| Benzene | MR | 3 | 1999 |
| Trichloroethylene | MR | 3 | 1999 |
| Arsenic | MR | 3 | 2001 |
| Xylenes, Total | MR | 3 | 1999 |
| o-Dichlorobenzene | MR | 3 | 1999 |
| DICHLOROMETHANE | MR | 3 | 1999 |
| Thallium, Total | MR | 3 | 2001 |
| Ethylbenzene | MR | 3 | 1999 |
| Chlorine | MR | 3 | 2010 |
| trans-1,2-Dichloroethylene | MR | 3 | 1999 |
| Carbon tetrachloride | MR | 3 | 1999 |
| 1,2,4-Trichlorobenzene | MR | 3 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.