Leupp Contract Boarding School BIA
PWS ID: NN0433009 · Winslow, Navajo Nation 86035
Population Served
250
Total Violations
90
Health-Based Violations
19
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 10
- School/Daycare
- Yes
- MCL Violations
- 19
- Monitoring Violations
- 48
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 8 | 2008 |
| Combined Radium (-226 and -228) | MCL | 6 | 2012 |
| 2,3,7,8-TCDD | MR | 5 | 2008 |
| Revised Total Coliform Rule | RPT | 4 | 2024 |
| Consumer Confidence Rule | Other | 4 | 2006 |
| Coliform (TCR) | MR | 3 | 2013 |
| Nitrate | MR | 3 | 2024 |
| Benzo(a)pyrene | MCL | 3 | 2010 |
| Nitrite | MR | 3 | 2024 |
| Gross Alpha, Excl. Radon and U | MCL | 2 | 2010 |
| BHC-GAMMA | MR | 1 | 2005 |
| Toxaphene | MR | 1 | 2005 |
| Diquat | MR | 1 | 2005 |
| Endothall | MR | 1 | 2005 |
| Glyphosate | MR | 1 | 2005 |
| OXAMYL | MR | 1 | 2005 |
| Simazine | MR | 1 | 2005 |
| Picloram | MR | 1 | 2005 |
| Dinoseb | MR | 1 | 2005 |
| Hexachlorocyclopentadiene | MR | 1 | 2005 |
| Aldicarb sulfoxide | MR | 1 | 2005 |
| Carbofuran | MR | 1 | 2005 |
| Heptachlor | MR | 1 | 2005 |
| 2,4-D | MR | 1 | 2005 |
| Pentachlorophenol | MR | 1 | 2005 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2005 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2005 |
| Lead and Copper Rule | MR | 1 | 2004 |
| Benzo(a)pyrene | MR | 1 | 2005 |
| Methoxychlor | MR | 1 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.