Twin Arrows Navajo Casino Internal
PWS ID: NN0400821 · Church Rock, Navajo Nation 87311
Population Served
25
Total Violations
93
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
- 80
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 21 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 18 | 2021 |
| TTHM | MR | 18 | 2021 |
| Coliform (TCR) | MR | 14 | 2015 |
| Revised Total Coliform Rule | RPT | 10 | 2023 |
| Lead and Copper Rule | MR | 6 | 2015 |
| Chlorine | MR | 3 | 2021 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.