BLACK MOUNTAIN WATER DISTRICT
PWS ID: OR4100370 · HERMISTON, Oregon 97838
Population Served
43
Total Violations
198
Health-Based Violations
29
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 88
- County
- Morrow
- School/Daycare
- No
- MCL Violations
- 29
- Monitoring Violations
- 162
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 32 | 2015 |
| Coliform (TCR) | MCL | 29 | 2015 |
| Nitrate | MR | 15 | 2008 |
| Public Notice | Other | 4 | 2017 |
| E. COLI | MR | 4 | 2017 |
| COLIPHAGE | MR | 3 | 2021 |
| Barium | MR | 2 | 2017 |
| Chromium | MR | 2 | 2017 |
| Fluoride | MR | 2 | 2017 |
| Nickel | MR | 2 | 2017 |
| Antimony, Total | MR | 2 | 2017 |
| Beryllium, Total | MR | 2 | 2017 |
| Selenium | MR | 2 | 2017 |
| Glyphosate | MR | 2 | 2017 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2017 |
| 2,4-D | MR | 2 | 2017 |
| Xylenes, Total | MR | 2 | 2017 |
| DICHLOROMETHANE | MR | 2 | 2017 |
| o-Dichlorobenzene | MR | 2 | 2017 |
| Vinyl chloride | MR | 2 | 2017 |
| trans-1,2-Dichloroethylene | MR | 2 | 2017 |
| 1,2-Dichloroethane | MR | 2 | 2017 |
| 1,1,1-Trichloroethane | MR | 2 | 2017 |
| 1,2-Dichloropropane | MR | 2 | 2017 |
| Trichloroethylene | MR | 2 | 2017 |
| 1,1,2-Trichloroethane | MR | 2 | 2017 |
| Tetrachloroethylene | MR | 2 | 2017 |
| Toluene | MR | 2 | 2017 |
| Styrene | MR | 2 | 2017 |
| Arsenic | MR | 2 | 2017 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.