Twin Arrows NTUA
PWS ID: NN0400822 · Ft Defiance, Navajo Nation 86504
Population Served
25
Total Violations
90
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Native American
- Connections
- 1
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 79
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Diquat | MR | 15 | 2015 |
| Endothall | MR | 15 | 2015 |
| Glyphosate | MR | 15 | 2015 |
| 2,3,7,8-TCDD | MR | 15 | 2015 |
| Xylenes, Total | MR | 10 | 2020 |
| TTHM | MR | 3 | 2015 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2015 |
| Revised Total Coliform Rule | Other | 2 | 2016 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | 2013 |
| Coliform (TCR) | MR | 1 | 2013 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.