Citing a toxic blue-green algae bloom, the city this afternoon closed Green Lake to “wading, swimming and “wet-water boating” activities like sailboarding.
Parks officials issued a special caution to dog owners not to even let dogs drink from the lake, citing the presence of a cyanobacterial toxin in amounts far exceeding the Washington Department of Health’s draft recreational guidelines.
“Rather than risk the health of any park user, we’re closing the lake to some activities until we have confirmation that the water is safe,” said Christopher Williams, acting parks superintendent. “The level of toxicity leads us to err on the side of caution to limit the risk of anyone ingesting the water.”
The lake is open to fishing and boating – activities in which users are unlikely to ingest the water. The closure will be in effect until the algae bloom has completed its life cycle. This could be weeks or months, depending on the fall weather and how it affects the algae in the lake.