Alum Treatment Update – LESJWA Explains Algae Bloom In East Bay Coves

Per Lake Elsinore and San Jacinto Watersheds Authority (LESJWA), the most recent algae bloom in some of the East Bay coves of Canyon Lake highlights the importance of alum treatments to help improve the overall water quality of Canyon Lake…

Algae forms when nutrients in the lake water, including phosphorous and nitrogen, are subjected to conditions such as high temperatures, low oxygen levels in the water and very little water movement.

Alum, a naturally-occurring mineral that is safe for humans and marine life, bind with phosphorous and become part of the lake sediment. Since phosphorous is a critical element needed for algae to bloom, it is expected that the alum will help reduce algae production.

“We’ve seen a dramatic drop in the amount of phosphorus in Canyon Lake during these last two alum applications, but the majority of work is ahead of us.” said Lake Elsinore and San Jacinto Watersheds Authority administrator Mark Norton.” We are confident we will see less and less of these algae blooms in the Main Body as well as the East Bay in the future as the alum treatments are completed.”

Three more alum treatments are scheduled for September 2014, February 2015, and September 2015. The project is being funded by a State grant and by the Lake Elsinore and Canyon Lake Total Maximum Daily Load (TMDL) Task Force composed of cities, the County of Riverside, agriculture and dairy coalitions and other organizations in the San Jacinto River Watershed.

Implementation of the alum project is being coordinated among the City of Canyon Lake, Elsinore Valley Municipal Water District, LESJWA, the TMDL Task Force, and the Canyon Lake Property Owners Association.

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