Thoreau High School
PWS ID: NN3510007 · Thoreau, Navajo Nation 87323
Population Served
746
Total Violations
61
Health-Based Violations
8
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 82
- School/Daycare
- Yes
- MCL Violations
- 2
- Monitoring Violations
- 42
- Treatment Tech Violations
- 6
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 12 | 2021 |
| Lead and Copper Rule | MR | 7 | 2024 |
| Revised Total Coliform Rule | TT | 6 | 2024 |
| Nitrite | MR | 5 | 2024 |
| Public Notice | Other | 5 | 2024 |
| Gross Beta Particle Activity | MR | 4 | 2014 |
| Coliform (TCR) | MR | 4 | 2016 |
| Chlorine | MR | 4 | 2021 |
| Revised Total Coliform Rule | RPT | 3 | 2024 |
| Consumer Confidence Rule | Other | 3 | 2022 |
| Nitrate | MR | 3 | 2021 |
| Revised Total Coliform Rule | MCL | 2 | 2024 |
| TTHM | MR | 1 | 2016 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 1 | 2013 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.