SOUTH HILLS WATER SYSTEM
PWS ID: OR4100306 · HILLSBORO, Oregon 97123
Population Served
250
Total Violations
17
Health-Based Violations
1
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 105
- County
- Washington
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 15
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 4 | 1999 |
| TTHM | MR | 4 | 2016 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2016 |
| Coliform (TCR) | MCL | 1 | 1991 |
| Arsenic | MR | 1 | 2005 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.