RAINBOW ENDS WATER SYSTEM
PWS ID: OR4101350 · HILLSBORO, Oregon 97123
Population Served
50
Total Violations
120
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 19
- County
- Washington
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 108
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 37 | 1996 |
| Lead and Copper Rule | MR | 3 | 1994 |
| BHC-GAMMA | MR | 2 | 2005 |
| Diquat | MR | 2 | 2005 |
| OXAMYL | MR | 2 | 2005 |
| TTHM | MR | 2 | 2009 |
| COLIPHAGE | MR | 2 | 2012 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2009 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2005 |
| Dinoseb | MR | 2 | 2005 |
| Heptachlor epoxide | MR | 2 | 2005 |
| LASSO | MR | 2 | 2005 |
| Carbofuran | MR | 2 | 2005 |
| Glyphosate | MR | 2 | 2005 |
| Toxaphene | MR | 2 | 2005 |
| Arsenic | MR | 1 | 2002 |
| Methoxychlor | MR | 1 | 2005 |
| Dalapon | MR | 1 | 2005 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2005 |
| Hexachlorocyclopentadiene | MR | 1 | 2005 |
| Atrazine | MR | 1 | 2005 |
| 2,4-D | MR | 1 | 2005 |
| HEXACHLOROBENZENE | MR | 1 | 2005 |
| Benzo(a)pyrene | MR | 1 | 2005 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2005 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2005 |
| ETHYLENE DIBROMIDE | MR | 1 | 2005 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2005 |
| cis-1,2-Dichloroethylene | MR | 1 | 2005 |
| Xylenes, Total | MR | 1 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.