CALVIN
PWS ID: OK2003201 · CALVIN, Oklahoma 74531
Population Served
300
Total Violations
230
Health-Based Violations
17
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 138
- County
- Hughes
- School/Daycare
- No
- MCL Violations
- 17
- Monitoring Violations
- 144
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 59 | 2015 |
| Consumer Confidence Rule | Other | 33 | 2025 |
| Coliform (TCR) | MCL | 12 | 2015 |
| Nitrate-Nitrite | MR | 9 | 2020 |
| Nitrate | MR | 6 | 2003 |
| Lead and Copper Rule | MR | 6 | 2010 |
| Tetrachloroethylene | MCL | 5 | 1996 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2007 |
| Gross Alpha, Excl. Radon and U | MR | 4 | 2021 |
| Combined Uranium | MR | 4 | 2021 |
| Combined Radium (-226 and -228) | MR | 4 | 2021 |
| TTHM | MR | 4 | 2007 |
| Gross Beta Particle Activity | MR | 4 | 2021 |
| 1,2,4-Trichlorobenzene | MR | 2 | 2002 |
| cis-1,2-Dichloroethylene | MR | 2 | 2002 |
| DICHLOROMETHANE | MR | 2 | 2002 |
| o-Dichlorobenzene | MR | 2 | 2002 |
| p-Dichlorobenzene | MR | 2 | 2002 |
| 1,1-Dichloroethylene | MR | 2 | 2002 |
| trans-1,2-Dichloroethylene | MR | 2 | 2002 |
| 1,1,1-Trichloroethane | MR | 2 | 2002 |
| 1,2-Dichloropropane | MR | 2 | 2002 |
| 1,1,2-Trichloroethane | MR | 2 | 2002 |
| Tetrachloroethylene | MR | 2 | 2002 |
| CHLOROBENZENE | MR | 2 | 2002 |
| Toluene | MR | 2 | 2002 |
| Ethylbenzene | MR | 2 | 2002 |
| Carbon tetrachloride | MR | 2 | 2002 |
| Trichloroethylene | MR | 2 | 2002 |
| Xylenes, Total | MR | 2 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.