OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 00665 | ||
| PWS Name: | TUALATIN VALLEY WATER DISTRICT | ||
| Who Was Contacted: | Tara Vanderwey | ||
| Contact Phone: | (Email address hidden) | ||
| Contact Date: | 10/28/2025 | ||
| Contacted By: | ALFAFARA, NICOLE (DWP) | ||
| Contact Method/Location: | |||
| Assistance Type: | WATER QUALITY ALERT RESPONSE | ||
| Reasons: | Coliform |
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| Details: | System reported a routine coliform sample collected on 10/28/2025 came back positive for total coliform (absent E. coli). The sample site is located in the 650 pressure zone, near NW Laidlaw Road and NW Saltzman Road. Chlorine residual at this site was 0.75 ppm. Three repeats were collected but no triggered source sample from the Grabhorn well is required since it was not running at the time. Results of repeat samples are expected on 10/29/2025. 10/29/2025 Update: Repeat samples came back TC-/EC-. No further action needed. |
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| Associated Alerts: | TCR-4796 - 10/28/2025 - COLIFORM (TCR) |
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