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Welcome to the Lakes Data and Descriptions application! Use this application to search, view, and download water quality data resulting from volunteer monitoring efforts at more than 50 lakes in western King County. Choose a lake by location on the map below or by name on the list next to the map.

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If you have a question about the program, please contact the Science Section Lakes and Streams Team at, or call the Water and Land Resources Department Reception Desk at 206-477-4800
For questions about lakes in King County, please contact or call the Water and Land Resources Division front desk at 206-477-4800.