Mittenrock NTUA
PWS ID: NN3503057 · Ft Defiance, Navajo Nation 86504
Population Served
352
Total Violations
95
Health-Based Violations
12
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 103
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 69
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 11 | 2017 |
| Arsenic | MR | 7 | 2014 |
| Fluoride | MR | 4 | 2011 |
| Coliform (TCR) | MR | 3 | 2012 |
| Public Notice | Other | 3 | 2017 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 3 | 2013 |
| Endrin | MR | 1 | 2008 |
| Dalapon | MR | 1 | 2008 |
| OXAMYL | MR | 1 | 2008 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2008 |
| Dinoseb | MR | 1 | 2008 |
| Carbofuran | MR | 1 | 2008 |
| Atrazine | MR | 1 | 2008 |
| 2,3,7,8-TCDD | MR | 1 | 2008 |
| Heptachlor epoxide | MR | 1 | 2008 |
| 2,4-D | MR | 1 | 2008 |
| 2,4,5-TP | MR | 1 | 2008 |
| HEXACHLOROBENZENE | MR | 1 | 2008 |
| cis-1,2-Dichloroethylene | MR | 1 | 2008 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2008 |
| ETHYLENE DIBROMIDE | MR | 1 | 2008 |
| Xylenes, Total | MR | 1 | 2008 |
| DICHLOROMETHANE | MR | 1 | 2008 |
| Vinyl chloride | MR | 1 | 2008 |
| 1,1-Dichloroethylene | MR | 1 | 2008 |
| 1,2-Dichloroethane | MR | 1 | 2008 |
| 1,1,1-Trichloroethane | MR | 1 | 2008 |
| Trichloroethylene | MR | 1 | 2008 |
| 1,1,2-Trichloroethane | MR | 1 | 2008 |
| Tetrachloroethylene | MR | 1 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.