Local officials are doubling down on efforts to protect Lake Sonoma from a tiny invasive mollusk with a massive destructive potential. At this week’s Sonoma County Board of Supervisors meeting, the board unanimously approved a plan to extend the Lake Sonoma Mussel Infestation Prevention Program, aiming to keep quagga and zebra mussels out of the reservoir. The board’s official resolution ratifies and approves Sonoma Water’s application for a state grant to fund two more years of mussel-prevention measures at Lake Sonoma. In plain terms, the county is trying to secure about $400,000 in state funding to continue boat inspections, public outreach, and early-detection monitoring on the lake through 2027.