Due to treatment for golden algae, Canyon Lake is closed through Sunday, November 9. This proactive measure is being taken to help reduce the growing presence of golden algae and support the overall health of the lake ecosystem.
The treatment will occur in both the main lake and East Bay and is expected to take four to five days to complete.
During this time, only Marine Patrol and application boats will be permitted on the water. The north ski area will remain open, as it does not require treatment.
The Canyon Lake POA and EVMWD are partnering to conduct the chelated copper algaecide treatment. This work coincides with the lake’s natural seasonal turnover, a process that can temporarily change water color, clarity, or odor as cooler surface water mixes with deeper layers.
The treatment will occur in two applications, approximately two weeks apart, and will be applied at a concentration that is safe for boats, people, fish, and other aquatic life. Swimming, boating, and all water contact will be temporarily restricted for up to 72 hours during and following each treatment as a precaution and to ensure unobstructed application procedures.
This application is expected to improve current water quality conditions and reduce the risk of future fish mortality. While this treatment is intended to reduce the algae, golden algae can reappear when environmental factors such as temperature and rainfall become favorable.
