Green Lake Warning - Avoid Algae Scum Accumulations
While toxic algae has been found in accumulated scums along the shores of Green Lake, the lake is not closed and remains open to most activities. Look for signs posted along the shoreline. For more information visit;
Seattle Parks and Recreation Page.
Swimmer's Itch Information
Visit Public Health -Seattle & King County
Swimmer's Itch Page to learn about swimmer's itch.
Thornton Creek Bacteria Study
Public warned to stay out of Thornton Creek due to high bacteria levels;
based on an intensive study done by the City of Seattle.
We recommend avoiding contact with water from the following creeks: John's Creek, Juanita Creek, Ravenna
Creek, Idylwood Creek, and Thornton Creek.