HENNESSEY
PWS ID: OK2003704 · HENNESSEY, Oklahoma 73742-0306
Population Served
2,058
Total Violations
277
Health-Based Violations
177
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,155
- County
- Kingfisher
- School/Daycare
- No
- MCL Violations
- 177
- Monitoring Violations
- 53
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 126 | 2003 |
| Nitrate-Nitrite | MCL | 42 | 2022 |
| Lead and Copper Rule | MR | 13 | 2022 |
| Nitrate-Nitrite | MR | 12 | 2019 |
| Coliform (TCR) | MR | 9 | 1999 |
| Coliform (TCR) | MCL | 9 | 2006 |
| Chlorine | MR | 8 | 2019 |
| Glyphosate | MR | 4 | 2008 |
| Revised Total Coliform Rule | MON | 4 | 2017 |
| E. COLI | MR | 3 | 2018 |
| Consumer Confidence Rule | Other | 2 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.