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The Third Avenue entrance to the King County Courthouse is temporarily closed. Please use the Fourth Avenue entrance.

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King County watershed map

Click on the map below to find information about specific watersheds, rivers and streams including news, reports, data, activities, grants, and stewardship organizations. For info spanning multiple watersheds, see King County's watershed information page.

King County Watersheds Map - Click your Watershed

White River Watershed Green River Watershed Snoqualmie - Skykomish River Watershed Sammamish Watershed Cedar River - Lake Washington Watershed Central Puget Sound Watershed Vashon-Maury Island Environmental Information

A watershed in King County is the land area draining to a nearby river or lake, or directly into Puget Sound.

City of Seattle watersheds

Seattle urban watersheds 
Urban creek watersheds not only are home to fish and wildlife, but help to filter stormwater before it enters lakes, the Duwamish River and Puget Sound.

Seattle watersheds (drinking water)
Information about Seattle's Tolt River and Cedar River watersheds, where Seattle and much of King County gets its drinking water.

City of Bellevue

Storm and surface water
City of Bellevue introduces its "stream team", provides information about lakes, streams and wetlands, provides help to prevent floods and water pollution, provides floodplain information and offers volunteer opportunities.