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UC Davis proposes hypolimnetic oxygenation pilot for Clear Lake to curb internal phosphorus loading

Lake County Board of Supervisors · January 15, 2026
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

UC Davis researchers outlined a three-year pilot to inject oxygen into Clear Lake bottom waters to reduce internal phosphorus release, targeting the Oaks Arm as a demonstration to lower risks of harmful algal blooms; board members pressed on permitting, costs and how a pilot would be sustained after grant funding ends.

Researchers from UC Davis told the Board that internal loading from lakebed sediments drives roughly 70% of the phosphorus that fuels summer algal blooms in Clear Lake. To reduce that source, the team proposed a hypolimnetic oxygenation system (HOS) pilot in the Oaks Arm for up to three years aimed at keeping bottom waters oxygenated to…

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