The following map depicts the locations of current swimming beach sampling stations in King County. 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 dots on the map. A summary of
historical closures can be found on the Historical Closures link.
Visit Public Health -Seattle & King County
Swimmer's Itch Page to learn about swimmer's itch.
Public warned to stay out of Thornton Creek due to high bacteria levels;
based on an intensive study done by the City of Seattle.