$name - King County

Lake Wilderness Beach O717SB

For algal toxin data please visit the State Toxic Algae web page and follow the “Find Lake” menu.

Please select a site and a year

The last year this beach was monitored is 2022. Please select a year from the drop down menu.

Table Legend

Cell Color	Fecal Coliform Value	Concern Level
	Individual day <= 200 CFU/100 ml	Low Concern - safe for swimming
	Individual day > 200 & <= 1000 CFU/100 ml	Moderate Concern – still safe for swimming
	Individual day > 1000 CFU/100 ml or geometric mean > 200 CFU/100 ml	High Concern – flagged for resample. For more information see Beach Closure Protocol – Fecal coliform bacteria

NOTE: Beach closure and reopening decisions are made by Public Health – Seattle & King County. Decisions are based on these results plus additional information about beach conditions, and may not always match the concern levels shown here.

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NOTE: Lake Wilderness is monitored through a contract with the City of Maple Valley and may have a different sampling frequency. ALGAL TOXIN samples are only collected during bloom events and submitted through the Washington State Toxic Algae Program. For more information visit the Washington State Toxic Algae Program database website.
Washington State Toxic Algae Program database