NORTH HILL WATER CORPORATION
PWS ID: OR4100374 · HERMISTON, Oregon 97838
Population Served
100
Total Violations
231
Health-Based Violations
35
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 29
- County
- Umatilla
- School/Daycare
- No
- MCL Violations
- 32
- Monitoring Violations
- 179
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 39 | 2010 |
| Coliform (TCR) | MCL | 32 | 2010 |
| Consumer Confidence Rule | Other | 12 | 2025 |
| Nitrate | MR | 12 | 2022 |
| Revised Total Coliform Rule | MON | 6 | 2022 |
| Public Notice | Other | 5 | 2024 |
| E. COLI | MR | 4 | 2024 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 2014 |
| Revised Total Coliform Rule | TT | 3 | 2024 |
| Endrin | MR | 2 | 2005 |
| BHC-GAMMA | MR | 2 | 2005 |
| Diquat | MR | 2 | 2005 |
| Endothall | MR | 2 | 2005 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2005 |
| Simazine | MR | 2 | 2005 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2005 |
| Dinoseb | MR | 2 | 2005 |
| Atrazine | MR | 2 | 2005 |
| LASSO | MR | 2 | 2005 |
| Heptachlor | MR | 2 | 2005 |
| 2,4-D | MR | 2 | 2005 |
| 2,4,5-TP | MR | 2 | 2005 |
| HEXACHLOROBENZENE | MR | 2 | 2005 |
| Pentachlorophenol | MR | 2 | 2005 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2005 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 2 | 2005 |
| Chlordane | MR | 2 | 2005 |
| Methoxychlor | MR | 2 | 2005 |
| Glyphosate | MR | 2 | 2005 |
| Picloram | MR | 2 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.