Dennehotso Boarding School BIA
PWS ID: NN0433004 · Dennehotso, Navajo Nation 86535
Population Served
300
Total Violations
101
Health-Based Violations
1
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 32
- School/Daycare
- Yes
- MCL Violations
- 1
- Monitoring Violations
- 77
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| 2,3,7,8-TCDD | MR | 5 | 2008 |
| Coliform (TCR) | MR | 5 | 2013 |
| Consumer Confidence Rule | Other | 5 | 2024 |
| Revised Total Coliform Rule | RPT | 4 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2010 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 3 | 2013 |
| Revised Total Coliform Rule | Other | 3 | 2016 |
| E. COLI | MR | 2 | 2016 |
| Arsenic | MCL | 1 | 2010 |
| Endrin | MR | 1 | 2004 |
| Dalapon | MR | 1 | 2004 |
| Endothall | MR | 1 | 2004 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2004 |
| Picloram | MR | 1 | 2004 |
| Hexachlorocyclopentadiene | MR | 1 | 2004 |
| Aldicarb sulfone | MR | 1 | 2004 |
| Aldicarb | MR | 1 | 2004 |
| 2,4-D | MR | 1 | 2004 |
| 2,4,5-TP | MR | 1 | 2004 |
| HEXACHLOROBENZENE | MR | 1 | 2004 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2004 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2004 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2004 |
| ETHYLENE DIBROMIDE | MR | 1 | 2004 |
| Xylenes, Total | MR | 1 | 2004 |
| Chlordane | MR | 1 | 2004 |
| DICHLOROMETHANE | MR | 1 | 2004 |
| o-Dichlorobenzene | MR | 1 | 2004 |
| p-Dichlorobenzene | MR | 1 | 2004 |
| Vinyl chloride | MR | 1 | 2004 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.