Navajo Mountain Community Boarding School BIA
PWS ID: NN4933011 · Tonalea, Navajo Nation 86044
Population Served
163
Total Violations
88
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 17
- School/Daycare
- Yes
- MCL Violations
- 6
- Monitoring Violations
- 50
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MR | 16 | 2020 |
| TTHM | MR | 16 | 2020 |
| Lead and Copper Rule | MR | 8 | 2017 |
| TTHM | MCL | 6 | 2018 |
| Coliform (TCR) | MR | 4 | 2015 |
| Revised Total Coliform Rule | RPT | 4 | 2023 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 3 | 2013 |
| Revised Total Coliform Rule | MON | 3 | 2024 |
| Public Notice | Other | 3 | 2018 |
| Revised Total Coliform Rule | Other | 3 | 2016 |
| Consumer Confidence Rule | Other | 2 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.