Sanostee-Tocito NTUA
PWS ID: NN3503059 · Ft Defiance, Navajo Nation 86504
Population Served
1,953
Total Violations
99
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 571
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 91
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 13 | 2012 |
| Fluoride | MR | 5 | 2011 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 3 | 2013 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2020 |
| TTHM | MR | 3 | 2020 |
| Arsenic | MR | 1 | 2008 |
| Barium | MR | 1 | 2008 |
| Chromium | MR | 1 | 2008 |
| Selenium | MR | 1 | 2008 |
| Thallium, Total | MR | 1 | 2008 |
| Endrin | MR | 1 | 2008 |
| BHC-GAMMA | MR | 1 | 2008 |
| Methoxychlor | MR | 1 | 2008 |
| Diquat | MR | 1 | 2008 |
| Glyphosate | MR | 1 | 2008 |
| Picloram | MR | 1 | 2008 |
| Dinoseb | MR | 1 | 2008 |
| Carbofuran | MR | 1 | 2008 |
| LASSO | MR | 1 | 2008 |
| 2,3,7,8-TCDD | MR | 1 | 2008 |
| Heptachlor | MR | 1 | 2008 |
| 2,4,5-TP | MR | 1 | 2008 |
| Benzo(a)pyrene | MR | 1 | 2008 |
| Pentachlorophenol | MR | 1 | 2008 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2008 |
| cis-1,2-Dichloroethylene | MR | 1 | 2008 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2008 |
| ETHYLENE DIBROMIDE | MR | 1 | 2008 |
| Chlordane | MR | 1 | 2008 |
| Vinyl chloride | MR | 1 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.