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Island Lake Closed Due to High E. coli

11 Jun

Summary

Island Lake in Kitsap County is under an advisory to avoid all contact.
Recent testing found E. coli levels at 1,992 MPN/100 mL, far exceeding the limit.
No illnesses have been reported, but the advisory will remain until bacteria levels decrease.

Island Lake in Kitsap County is currently unsafe for contact due to elevated E. coli bacteria levels. The Kitsap Public Health District issued an advisory on June 9, 2026, recommending that all residents avoid the water. Testing performed on that date detected E. coli at a geometric mean value of 1,992 MPN/100 mL, which is substantially higher than the advisory limit of 100 MPN/100 mL.

Public health officials are actively monitoring the situation and plan to lift the advisory once bacteria levels decrease to safer standards. Although no health issues have been reported from exposure to the lake water, the health district specifically warns against using the swimming area located at the Kitsap County park on the lake's north end. Residents can stay informed about local lake advisories through the Kitsap Public Health District website.

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