CHART SUBDIVISION
PWS ID: OR4101415 · HERMISTON, Oregon 97838
Population Served
125
Total Violations
302
Health-Based Violations
14
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 33
- County
- Umatilla
- School/Daycare
- No
- MCL Violations
- 14
- Monitoring Violations
- 282
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 97 | 2016 |
| Lead and Copper Rule | MR | 13 | 2011 |
| Coliform (TCR) | MCL | 11 | 2009 |
| Nitrate | MR | 10 | 2011 |
| Carbon tetrachloride | MR | 3 | 2005 |
| cis-1,2-Dichloroethylene | MR | 3 | 2005 |
| DICHLOROMETHANE | MR | 3 | 2005 |
| CHLOROBENZENE | MR | 3 | 2005 |
| o-Dichlorobenzene | MR | 3 | 2005 |
| Trichloroethylene | MR | 3 | 2005 |
| 2,4-D | MR | 3 | 2005 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2005 |
| LASSO | MR | 3 | 2005 |
| BHC-GAMMA | MR | 3 | 2005 |
| Carbofuran | MR | 3 | 2005 |
| Chlordane | MR | 3 | 2005 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 3 | 2005 |
| Dinoseb | MR | 3 | 2005 |
| Diquat | MR | 3 | 2005 |
| Endothall | MR | 3 | 2005 |
| ETHYLENE DIBROMIDE | MR | 3 | 2005 |
| Glyphosate | MR | 3 | 2005 |
| HEXACHLOROBENZENE | MR | 3 | 2005 |
| Hexachlorocyclopentadiene | MR | 3 | 2005 |
| Methoxychlor | MR | 3 | 2005 |
| Pentachlorophenol | MR | 3 | 2005 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2005 |
| Picloram | MR | 3 | 2005 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2005 |
| Simazine | MR | 3 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.