Lake County approves $921K algae mitigation project at Clear Lake with LG Sonic

The Lake County Board of Supervisors convened on March 25, 2025, to discuss the approval of the LG Sonic Buoy harmful algal bloom mitigation project for Clear Lake, a critical initiative aimed at addressing the ongoing issue of harmful algae blooms in one of North America's oldest lakes.

The board unanimously approved a contract with LG Sonic for the project, which will cost $921,407.12. This funding will cover the purchase, installation, and operation of 14 algae mitigation buoys equipped with interactive control software. The project is designed to reduce the harmful impacts of blue-green algae and cyanobacteria, which have been exacerbated by rising temperatures and nutrient pollution. With 60% of Lake County's residents relying on Clear Lake for drinking water, the urgency of this project is paramount.

The implementation of the buoys will utilize ultrasonic waves to inhibit algae growth without harming aquatic life. The Lake County Water Resources Department will oversee the project, which is expected to span 24 months. Funding for the project is sourced from the Watershed Protection District and will be reimbursed through administrative accounts.

During the meeting, Supervisor Spatie expressed optimism about the project's potential impact, noting that successful outcomes could lead to further expansions in other areas affected by algal blooms. However, Supervisor Pyska raised concerns regarding navigation safety, public education, and potential vandalism of the buoys. She emphasized the need for a comprehensive plan detailing the management and maintenance of the buoys, as well as the involvement of local partners.

Vice Chair of the Board also acknowledged the importance of the project, highlighting its role in maintaining the lake's recreational appeal and water quality. Questions were raised about the potential effects of the ultrasonic technology on local wildlife, including waterfowl. An LG Sonic representative assured the board that there are no known adverse impacts on wildlife, and in fact, the enhanced water quality could benefit local bird populations.

The meeting concluded with a commitment to further refine the project's operational details and address the concerns raised by board members, ensuring a thorough approach to mitigating the harmful effects of algal blooms in Clear Lake.