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Lakes experiencing toxic algae blooms are listed below and have been posted with WARNING signs. The WA State toxin testing program is closed for the winter, WARNING signs are posted when scum is present.
Updated 4/1/2021
BLACKMANS LAKE - intermittent blue-green algae blooms with green scum near the shoreline. Previous sample results show that Microcystin, a liver toxin, were detected at 22 ppb. This is above the WA state Recreational limits of 8 ppb. If you would like to sign up for alerts, please visit the City of Snohomish website and sign up for NewsFlash updates.
LAKE HOWARD - heavy blue-green algae bloom along the shoreline near the boat launch. Previous algae samples contained species known to produce liver toxins and neurotoxins.
LOST LAKE - intermittent blue-green algae bloom at the south end of the lake. Previous algae samples contained species known to produce liver toxins.
Please follow the guidelines on the WARNING sign when recreating.
