Todahaidekani NTUA
PWS ID: NN4903071 · Ft Defiance, Navajo Nation 86504
Population Served
301
Total Violations
140
Health-Based Violations
31
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 88
- School/Daycare
- No
- MCL Violations
- 31
- Monitoring Violations
- 82
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 31 | 2020 |
| Public Notice | Other | 8 | 2020 |
| Coliform (TCR) | MR | 6 | 2012 |
| Arsenic | MR | 3 | 2022 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 3 | 2013 |
| Glyphosate | MR | 2 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 2005 |
| Revised Total Coliform Rule | Other | 2 | 2016 |
| Endothall | MR | 2 | 2008 |
| 2,3,7,8-TCDD | MR | 2 | 2008 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2008 |
| Diquat | MR | 2 | 2008 |
| Fluoride | MR | 1 | 2008 |
| Nitrite | MR | 1 | 2010 |
| Selenium | MR | 1 | 2008 |
| Antimony, Total | MR | 1 | 2008 |
| Beryllium, Total | MR | 1 | 2008 |
| Endrin | MR | 1 | 2008 |
| Dalapon | MR | 1 | 2008 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2008 |
| Simazine | MR | 1 | 2008 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2008 |
| Picloram | MR | 1 | 2008 |
| Hexachlorocyclopentadiene | MR | 1 | 2008 |
| Atrazine | MR | 1 | 2008 |
| LASSO | MR | 1 | 2008 |
| Heptachlor epoxide | MR | 1 | 2008 |
| 2,4-D | MR | 1 | 2008 |
| HEXACHLOROBENZENE | MR | 1 | 2008 |
| Pentachlorophenol | MR | 1 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.