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Lake Swimming Beach Bacteria
Stay Informed – click the links below to sign up
Current Beach Closures:
All sampled beaches are open.
The following map depicts the locations of current freshwater swimming beach sampling stations in King County.
For marine beach data in King County visit the Washington State Dept. of Ecology'
BEACH monitoring page.
To view the current bacteria,
algal toxin, and temperature data, either click on the map or select from the list of beaches. Units of bacteria data are cfu/100mL.
Algal toxin units are µg/L. To view a list of historical sites monitored, visit the Archived Data
link. Current beach closures, if any, are listed right hand column of this page and will appear as red diamonds on the map. A summary of
historical closures can be found on the Historical Closures link.

Closed: High bacteria

Low bacteria

Stream

Beach not sampled for past 4 weeks