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District reports slight rise in PFOA but levels remain below California limit; Well #5 back online, Well #6 offline

Lake Arrowhead Community Services District Executive Committee ยท July 1, 2026
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Summary

General Manager Catherine Cerri reported a slight rise in PFOA that pushed the quarterly average above 7 ppt but still below California's 10 ppt limit; Well #5 returned to service after bacterial treatment and Well #6 was offline due to equipment failure following Edison outages.

At the Aug. 18 Executive Committee meeting, General Manager Catherine Cerri provided an operations update that included water-quality monitoring and well status. She said quarterly PFOA levels rose slightly, bringing the quarterly average above 7 parts-per-trillion, and noted that this figure remains below the California limit of 10 ppt.

Cerri also reported operational changes at district wells: Well #5 has returned to service after treatment for bacterial activity; Well #6 remained offline because of equipment failure tied to recent Edison power outages. The committee received the update for inclusion in the board packet; no emergency actions were taken during the executive committee meeting.