TONKAWA
PWS ID: OK2003603 · TONKAWA, Oklahoma 74653
Population Served
3,299
Total Violations
115
Health-Based Violations
17
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,255
- County
- Kay
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 88
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| E. COLI | MR | 18 | 2025 |
| Coliform (TCR) | MR | 16 | 2013 |
| Coliform (TCR) | MCL | 15 | 2011 |
| Lead and Copper Rule | MR | 8 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 4 | 2001 |
| Gross Beta Particle Activity | MR | 4 | 2001 |
| Picloram | MR | 4 | 2005 |
| Consumer Confidence Rule | Other | 4 | 2014 |
| TTHM | MR | 4 | 2022 |
| Combined Radium (-226 and -228) | MR | 4 | 2001 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2022 |
| LASSO | MR | 3 | 2005 |
| BHC-GAMMA | MR | 3 | 2005 |
| Atrazine | MR | 3 | 2005 |
| Glyphosate | MR | 3 | 2005 |
| 2,4-D | MR | 3 | 2005 |
| Carbofuran | MR | 3 | 2005 |
| Nitrate | MR | 2 | 2001 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| Nitrite | MR | 2 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.