OHA Drinking Water Services Water Advisory Details |
|
| PWS ID: | OR41 01172 |
| PWS Name: | WESTERN HILLS MH ESTATES |
| Advisory Type: | Boil Water |
| Reason: | Treatment Failure, Disinfection |
| Area Affected: | System-wide |
| Affected Populations: | All |
| Begin Date: | Oct 23, 2025 |
| Date Lifted: | Open |
| Contacted By: | LE, TAN KHOA (COLUMBIA COUNTY) |
| Who Was Contacted: | Curtis Olsen |
| Contact Phone: | 503-537-8334 |
| Details: | They have issues with the chlorine injection feed system at Western Hills MHP and the free chlorine residual fell below the 4-log requirement of 0.4 mg/L. The chemical dosing system has since been repaired and they are waiting for EP-As chlorine residual to consistently meet their minimum. Once the threshold is recovered, they will take a special coliform test in distribution to confirm there are no contaminants. |