Leupp-Birdsprings-Tolani Lake NTUA
PWS ID: NN0403033 · Ft Defiance, Navajo Nation 86504
Population Served
2,100
Total Violations
57
Health-Based Violations
8
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 614
- School/Daycare
- No
- MCL Violations
- 7
- Monitoring Violations
- 38
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 8 | 2012 |
| TTHM | MR | 4 | 2020 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2020 |
| Diquat | MR | 3 | 2008 |
| Endothall | MR | 3 | 2008 |
| 2,3,7,8-TCDD | MR | 3 | 2008 |
| Coliform (TCR) | MCL | 3 | 2008 |
| Mercury | MR | 3 | 2008 |
| Glyphosate | MR | 3 | 2008 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2008 |
| Thallium, Total | MCL | 2 | 2010 |
| Antimony, Total | MCL | 2 | 2010 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | 2013 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 2004 |
| Revised Total Coliform Rule | TT | 1 | 2017 |
| Revised Total Coliform Rule | Other | 1 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.