Casamero Lake-Smith Lake NTUA
PWS ID: NN3500256 · Ft Defiance, Navajo Nation 86504
Population Served
906
Total Violations
202
Health-Based Violations
5
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 265
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 174
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Diquat | MR | 15 | 2014 |
| Endothall | MR | 15 | 2014 |
| Glyphosate | MR | 15 | 2014 |
| 2,3,7,8-TCDD | MR | 15 | 2014 |
| Coliform (TCR) | MR | 8 | 2014 |
| Coliform (TCR) | MCL | 5 | 2014 |
| Nitrate | MR | 3 | 2010 |
| Endrin | MR | 2 | 2012 |
| Methoxychlor | MR | 2 | 2012 |
| Toxaphene | MR | 2 | 2012 |
| Dalapon | MR | 2 | 2012 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2012 |
| OXAMYL | MR | 2 | 2012 |
| Simazine | MR | 2 | 2012 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2012 |
| Dinoseb | MR | 2 | 2012 |
| Carbofuran | MR | 2 | 2012 |
| LASSO | MR | 2 | 2012 |
| Heptachlor | MR | 2 | 2012 |
| Heptachlor epoxide | MR | 2 | 2012 |
| 2,4-D | MR | 2 | 2012 |
| Benzo(a)pyrene | MR | 2 | 2012 |
| Pentachlorophenol | MR | 2 | 2012 |
| 1,2,4-Trichlorobenzene | MR | 2 | 2012 |
| cis-1,2-Dichloroethylene | MR | 2 | 2012 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2012 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 2 | 2012 |
| DICHLOROMETHANE | MR | 2 | 2012 |
| o-Dichlorobenzene | MR | 2 | 2012 |
| p-Dichlorobenzene | MR | 2 | 2012 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.