COLUMBIA HILLS HOA
PWS ID: OR4106118 · CLACKAMAS, Oregon 97015
Population Served
84
Total Violations
344
Health-Based Violations
13
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 47
- County
- Columbia
- School/Daycare
- No
- MCL Violations
- 13
- Monitoring Violations
- 322
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 14 | 2011 |
| COLIPHAGE | MR | 14 | 2024 |
| Coliform (TCR) | MCL | 13 | 2014 |
| Coliform (TCR) | MR | 11 | 2015 |
| Lead and Copper Rule | MR | 8 | 2024 |
| E. COLI | MR | 5 | 2014 |
| Combined Radium (-226 and -228) | MR | 5 | 2024 |
| Gross Alpha, Excl. Radon and U | MR | 5 | 2024 |
| Combined Uranium | MR | 5 | 2024 |
| Arsenic | MR | 4 | 2008 |
| Nitrite | MR | 4 | 2008 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2008 |
| cis-1,2-Dichloroethylene | MR | 4 | 2008 |
| Xylenes, Total | MR | 4 | 2008 |
| DICHLOROMETHANE | MR | 4 | 2008 |
| o-Dichlorobenzene | MR | 4 | 2008 |
| p-Dichlorobenzene | MR | 4 | 2008 |
| Vinyl chloride | MR | 4 | 2008 |
| 1,1-Dichloroethylene | MR | 4 | 2008 |
| trans-1,2-Dichloroethylene | MR | 4 | 2008 |
| 1,2-Dichloroethane | MR | 4 | 2008 |
| 1,1,1-Trichloroethane | MR | 4 | 2008 |
| Carbon tetrachloride | MR | 4 | 2008 |
| 1,2-Dichloropropane | MR | 4 | 2008 |
| Trichloroethylene | MR | 4 | 2008 |
| 1,1,2-Trichloroethane | MR | 4 | 2008 |
| Tetrachloroethylene | MR | 4 | 2008 |
| CHLOROBENZENE | MR | 4 | 2008 |
| Benzene | MR | 4 | 2008 |
| Toluene | MR | 4 | 2008 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.