Rough Rock Community High School BIA
PWS ID: NN0435212 · Chinle, Navajo Nation 86503
Population Served
350
Total Violations
134
Health-Based Violations
32
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Federal
- Connections
- 27
- School/Daycare
- Yes
- MCL Violations
- 30
- Monitoring Violations
- 59
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 30 | 2023 |
| Arsenic | MR | 11 | 2025 |
| Coliform (TCR) | MR | 8 | 2012 |
| Public Notice | Other | 8 | 2023 |
| Revised Total Coliform Rule | RPT | 5 | 2025 |
| 2,3,7,8-TCDD | MR | 4 | 2008 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 4 | 2013 |
| Fluoride | MR | 4 | 2008 |
| Revised Total Coliform Rule | Other | 4 | 2016 |
| Lead and Copper Rule | MR | 2 | 2008 |
| Revised Total Coliform Rule | TT | 2 | 2016 |
| Nitrate | MR | 1 | 2024 |
| cis-1,2-Dichloroethylene | MR | 1 | 2004 |
| Xylenes, Total | MR | 1 | 2004 |
| DICHLOROMETHANE | MR | 1 | 2004 |
| o-Dichlorobenzene | MR | 1 | 2004 |
| p-Dichlorobenzene | MR | 1 | 2004 |
| 1,1,1-Trichloroethane | MR | 1 | 2004 |
| Carbon tetrachloride | MR | 1 | 2004 |
| Trichloroethylene | MR | 1 | 2004 |
| Tetrachloroethylene | MR | 1 | 2004 |
| Benzene | MR | 1 | 2004 |
| Ethylbenzene | MR | 1 | 2004 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2010 |
| Revised Total Coliform Rule | MON | 1 | 2020 |
| 1,2-Dichloropropane | MR | 1 | 2004 |
| CHLOROBENZENE | MR | 1 | 2004 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2004 |
| trans-1,2-Dichloroethylene | MR | 1 | 2004 |
| Styrene | MR | 1 | 2004 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.