Pinehill Community and School
PWS ID: NN3500250 · Tonalea, Navajo Nation 86044
Population Served
1,007
Total Violations
726
Health-Based Violations
20
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 267
- School/Daycare
- Yes
- MCL Violations
- 20
- Monitoring Violations
- 608
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 139 | 2012 |
| Nitrate | MR | 34 | 2024 |
| Revised Total Coliform Rule | MON | 25 | 2025 |
| Consumer Confidence Rule | Other | 21 | 2024 |
| Revised Total Coliform Rule | RPT | 17 | 2025 |
| Nitrite | MR | 14 | 2024 |
| Public Notice | Other | 13 | 2025 |
| Di(2-ethylhexyl) phthalate | MCL | 12 | 2014 |
| Barium | MR | 9 | 2011 |
| Selenium | MR | 9 | 2011 |
| Antimony, Total | MR | 9 | 2011 |
| Beryllium, Total | MR | 9 | 2011 |
| Thallium, Total | MR | 9 | 2011 |
| 2,3,7,8-TCDD | MR | 9 | 2008 |
| Fluoride | MR | 8 | 2011 |
| Total Polychlorinated Biphenyls (PCB) | MR | 7 | 2011 |
| Aldicarb sulfoxide | MR | 6 | 2005 |
| Aldicarb sulfone | MR | 6 | 2005 |
| Aldicarb | MR | 6 | 2005 |
| 1,2,4-Trichlorobenzene | MR | 6 | 2005 |
| cis-1,2-Dichloroethylene | MR | 6 | 2005 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 6 | 2005 |
| ETHYLENE DIBROMIDE | MR | 6 | 2005 |
| Chlordane | MR | 6 | 2005 |
| DICHLOROMETHANE | MR | 6 | 2005 |
| o-Dichlorobenzene | MR | 6 | 2005 |
| p-Dichlorobenzene | MR | 6 | 2005 |
| 1,1-Dichloroethylene | MR | 6 | 2005 |
| trans-1,2-Dichloroethylene | MR | 6 | 2005 |
| 1,2-Dichloroethane | MR | 6 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.