Research team introduces innovative technologies to control canal algae growth in Ocean Shores

The Town Hall Meeting held on February 6, 2025, in Ocean Shores, WA, focused on addressing water quality issues and exploring innovative solutions for managing algae growth in local waterways. The meeting featured discussions led by Herrera Environmental Consultants, who presented various strategies and technologies aimed at improving the health of the region's aquatic ecosystems.

A significant point raised during the meeting was the misconception regarding the sources of phosphorus in the waterways. It was emphasized that sediments are not the primary source of phosphorus, which predominantly comes from groundwater. The removal of sediments, while potentially beneficial, could inadvertently create conditions that allow more phosphorus to enter the system, complicating efforts to manage algae blooms.

The consultants introduced several experimental and emerging technologies that could help control algae growth. These included sonication, which uses high-frequency ultrasound to disrupt algae movement; ozone treatment, which damages cyanobacteria cells and oxidizes toxins; and micro and nanobubbles, which introduce oxygen into the water and disturb competitive algae. Other methods discussed were the use of straw or barley straw to inhibit algae growth through decay and the application of dyes to reduce light availability for algae.

The effectiveness of these methods varies, and the consultants noted that no single solution would be a "silver bullet" for the complex issues facing the waterways. Instead, they proposed the establishment of management units to tailor strategies to the unique conditions of different canal and lake areas. This approach would allow for targeted experimentation with various technologies, enabling the community to assess their effectiveness in real-world conditions.

The meeting concluded with an invitation for community input, highlighting the importance of collaboration in developing a comprehensive strategy to enhance water quality and manage algae growth in Ocean Shores. The proposed management units aim to create a more personalized and effective approach to addressing the specific needs of each waterway, fostering a healthier aquatic environment for the future.