Chinle High School
PWS ID: NN0403062 · Chinle, Navajo Nation 86503
Population Served
975
Total Violations
250
Health-Based Violations
8
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 8
- School/Daycare
- Yes
- MCL Violations
- 8
- Monitoring Violations
- 190
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 79 | 2016 |
| Revised Total Coliform Rule | MON | 22 | 2025 |
| Nitrate | MR | 21 | 2024 |
| Nitrite | MR | 20 | 2024 |
| Revised Total Coliform Rule | RPT | 18 | 2025 |
| Consumer Confidence Rule | Other | 13 | 2011 |
| Coliform (TCR) | MCL | 5 | 2010 |
| Total Haloacetic Acids (HAA5) | MR | 5 | 2011 |
| TTHM | MR | 5 | 2011 |
| Antimony, Total | MCL | 3 | 1999 |
| Barium | MR | 3 | 2011 |
| Chromium | MR | 3 | 2011 |
| Mercury | MR | 3 | 2011 |
| Selenium | MR | 3 | 2011 |
| Thallium, Total | MR | 3 | 2011 |
| Lead and Copper Rule | MR | 3 | 2008 |
| Revised Total Coliform Rule | Other | 3 | 2016 |
| Public Notice | Other | 3 | 2023 |
| CYANIDE | MR | 3 | 2011 |
| Beryllium, Total | MR | 3 | 2011 |
| Cadmium | MR | 3 | 2011 |
| Arsenic | MR | 3 | 2011 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2008 |
| Antimony, Total | MR | 3 | 2011 |
| E. COLI | MR | 2 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.