Baca-Haystack NTUA
PWS ID: NN3500254 · Ft Defiance, Navajo Nation 86504
Population Served
376
Total Violations
145
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 110
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 124
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 12 | 2012 |
| Barium | MR | 5 | 2008 |
| Mercury | MR | 5 | 2008 |
| Endothall | MR | 4 | 2008 |
| 2,3,7,8-TCDD | MR | 4 | 2008 |
| ETHYLENE DIBROMIDE | MR | 4 | 2008 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 4 | 2008 |
| Diquat | MR | 4 | 2008 |
| Glyphosate | MR | 4 | 2008 |
| Total Polychlorinated Biphenyls (PCB) | MR | 4 | 2008 |
| Fluoride | MR | 3 | 2011 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 3 | 2013 |
| CYANIDE | MR | 3 | 2008 |
| Selenium | MR | 2 | 2005 |
| Antimony, Total | MR | 2 | 2005 |
| Thallium, Total | MR | 2 | 2005 |
| Revised Total Coliform Rule | Other | 2 | 2016 |
| Beryllium, Total | MR | 2 | 2005 |
| Arsenic | MR | 2 | 2005 |
| Chromium | MR | 2 | 2005 |
| Cadmium | MR | 2 | 2005 |
| Nitrite | MR | 1 | 2010 |
| Methoxychlor | MR | 1 | 2004 |
| Toxaphene | MR | 1 | 2004 |
| Dalapon | MR | 1 | 2004 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2004 |
| OXAMYL | MR | 1 | 2004 |
| Simazine | MR | 1 | 2004 |
| Picloram | MR | 1 | 2004 |
| Dinoseb | MR | 1 | 2004 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.