OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 01246 | ||
| PWS Name: | YOUNG LIFE | ||
| Who Was Contacted: | JOHN GASTINEAU | ||
| Contact Phone: | 541-489-3100 ext 1104 (Email address hidden) | ||
| Contact Date: | 02/26/2025 | ||
| Contacted By: | SEERUP, JOSH (DWP) | ||
| Contact Method/Location: | |||
| Assistance Type: | WATER QUALITY ALERT RESPONSE | ||
| Reasons: | Disinfection Byproducts |
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| Details: | Young Life’s February 5, 2025 TTHM sample result was 0.0983 mg/L and the LRAA was 0.072 mg/L, which is lower than the LRAA MCL of 0.08 mg/L. Because the LRAA is lower than the MCL, a tier 2 advisory is not needed. The OEL is 0.0823 mg/L, which is above the MCL of 0.08 mg/L. Because the OEL exceeds the MCL, the system must examine treatment and distribution system practices to determine factors that could contribute to byproduct formation. An OEL report with findings any byproduct reduction strategies will need to be prepared and submitted to OHA by May 26, 2025. In 2024, Young Life installed plate settlers, coagulation, and granulated activated carbon (GAC) filters to help alleviate high TOC and DBP issues. They have low demand in winter and usually need to increase flushing throughout the distribution system to keep DBPs low. In February 2025, OHA’s Drinking Water Services issued Young Life preliminary approval for a new surface water intake on the John Day River, which, when approved for use, may lead to further reductions. Update 02/26/205: The system submitted an OEL form that indicated that due to extremely high stream flows in early 2025, the surface water source had high turbidity levels that created higher chlorine demand. These conditions coincided with the time of year of lowest water demand in their system, contributing to higher water age. High turbidity (and associated TOC load), high chlorine demand, and water age are factors that can contribute to DBP formation. They have recently completed upgrades to their treatment facility by adding an inclined plate clarifier and granular activated carbon (GAC) to address previous DBP exceedances. They will continue to optimize the operation of the upgraded treatment system for these atypical feed water conditions. They have also scheduled the replacement of their GAC media for April 2025. Additionally, they will increase flushing operations to reduce water age in the system. |
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| Associated Alerts: | DBP-137 - 02/25/2025 - TTHM |
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