HOLLIS
PWS ID: OK2002901 · HOLLIS, Oklahoma 73550
Population Served
2,264
Total Violations
1,004
Health-Based Violations
886
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 957
- County
- Harmon
- School/Daycare
- No
- MCL Violations
- 886
- Monitoring Violations
- 44
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate-Nitrite | MCL | 545 | 2024 |
| Nitrate | MCL | 323 | 2003 |
| Nitrate-Nitrite | MR | 22 | 2010 |
| Coliform (TCR) | MCL | 18 | 2011 |
| Coliform (TCR) | MR | 8 | 2004 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2022 |
| TTHM | MR | 4 | 2022 |
| Lead and Copper Rule | MR | 3 | 2024 |
| Chlorine | MR | 3 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.