Toadlena Boarding School BIA
PWS ID: NN3532011 · Newcomb, Navajo Nation 87455-9857
Population Served
200
Total Violations
153
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 30
- School/Daycare
- Yes
- MCL Violations
- 0
- Monitoring Violations
- 137
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 8 | 2015 |
| 2,3,7,8-TCDD | MR | 6 | 2008 |
| Fluoride | MR | 4 | 2008 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2022 |
| Revised Total Coliform Rule | RPT | 3 | 2025 |
| Revised Total Coliform Rule | Other | 3 | 2016 |
| TTHM | MR | 3 | 2022 |
| Nitrate | MR | 2 | 2024 |
| Nitrite | MR | 2 | 2024 |
| Endrin | MR | 2 | 2004 |
| Toxaphene | MR | 2 | 2004 |
| Dalapon | MR | 2 | 2004 |
| Diquat | MR | 2 | 2004 |
| Glyphosate | MR | 2 | 2004 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2004 |
| OXAMYL | MR | 2 | 2004 |
| Picloram | MR | 2 | 2004 |
| Hexachlorocyclopentadiene | MR | 2 | 2004 |
| Aldicarb sulfoxide | MR | 2 | 2004 |
| Aldicarb sulfone | MR | 2 | 2004 |
| Carbofuran | MR | 2 | 2004 |
| Atrazine | MR | 2 | 2004 |
| Heptachlor | MR | 2 | 2004 |
| Heptachlor epoxide | MR | 2 | 2004 |
| 2,4-D | MR | 2 | 2004 |
| Benzo(a)pyrene | MR | 2 | 2004 |
| cis-1,2-Dichloroethylene | MR | 2 | 2004 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2004 |
| Xylenes, Total | MR | 2 | 2004 |
| DICHLOROMETHANE | MR | 2 | 2004 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.