Lake Washington information
King County, Washington
Quick facts on Lake Washington's status
Lake Washington story
Overview describing Lake Washington, its problems with phosphorus pollution and factors impacting the water quality of Lake Washington.
Greening your shoreline
A tool for lakeshore property owners on Lake Washington and Lake Sammamish to improve shorelines for people and salmon.
Water quality data
Swimming beach bacteria and algal toxin levels, and water temperature
Contains a map depicting the locations of current swimming beach sampling stations in King County. To view the current bacteria and temperature data, either click on the map or select from the list of beaches. It also contains links to archived data.
Real-time combined sewer overflow status
Look up the status of sewer overflows along Lake Washington and other locations in the Seattle area.
Lake Washington monitoring
Overview of the lake including water quality graphs and data, and general metrics and statistics characterizing Lake Washington.
Tributary stream water quality data
Parks, trails and recreation
Boating regulations fact sheet
Boating restrictions, equipment requirements, safety, aquatic weed, and other related information. (Washington State marine laws also affect King County boaters.)
Burke Gilman Trail
A paved, off-road facility over its entire length with the exception of an on-road segment in Ballard.Runs more than 18 miles from Shilshole Bay in the City of Seattle to the City of Bothell where it intersects the Sammamish River Trail.
Drainage basin information
Cedar River-Lake Washington watershed
Cedar River - Lake Washington watershed map
Drainage map displaying streams, lakes, drainage divides, major roads and cities in the area that drains to Lake Washington and out the Hiram M. Chittenden Locks, except for the Sammamish Watershed area. The map is in Acrobat format. File size is 445 Kb.
Sammamish watershed
Salmon and salmon recovery
Salmon in the greater Lake Washington watershed
Fish distribution and Salmon Watcher Site maps.
Salmon restoration in the greater Lake Washington watershed
Salmon plans, volunteer and funding opportunities, news and other information.
Salmon Watcher Program
Salmonid species information and illustrations of fish that you may see in your stream.
Studies/reports
Lake Washington Existing Conditions Report: A report on Lake Washington water quality
Water quality trends and conditions in Lake Washington from 1990 to 2001. Summarizes lake conditions and how Lake Washington has responded to human activities that have changed the watershed.
Sediment Quality Evaluation in Lake Sammamish, Lake Union, and Lake Washingon, Washington State
The Sediment Quality Triad (SQT) approach to sediment quality evaluation was used to characterize and assess the extent of altered benthic invertebrate assemblages, sediment contamination and toxicity.
Years 2004-2005 Annual Report for the City of Mercer Island: Water Quality Monitoring in Five Drainage Basins: 6, 10, 26, 32, and 42
Presents the results of WLRD's efforts for 2004-2005 and provides a comparison to results from 2003.
Major Lakes Continuous Temperature Study: Interim Progress Report
Aquatic ecosystem responses to changing climate in the three major lakes routinely monitored by King County.
Highway 520 Bridge Storm Water Runoff Study
Part of a comprehensive evaluation of current and future water quality conditions in Lake Washington to support informed decision-making.
Lake Washington Shoreline Master Programs - by jurisdiction
For questions about Lake Washington, please contact Sally Abella, senior engineer, Lake Stewardship Program.
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