This page provides watershed-related information that spans the
county or multiple watersheds within it. To find information about
a specific watershed, use King County's
watershed
index map to find it.
 Resources
Introduction to Watersheds
A general overview of watersheds, what they are and why they are valuable.
King County Basin Stewards
Basin stewards are watershed experts who help citizens by solving watershed related problems and providing answers to their questions. Basin stewards respond to inquiries, coordinate help among diverse public agencies, facilitate watershed improvement projects, provide assistance to monitoring programs, and provide public education.
 Environmental Indicators for Rivers and Streams 
Learn about the condition of King County’s rivers and streams, key factors influencing their condition, King County actions, and how you can help.
King County
Extension Watershed Stewardship Program (external link)
Learn how to become a steward with this university-based program
designed to help communities become engaged in valuing and protecting
our environment through education and research.
Streams
Monitoring Data
Keeping watch for pollution in King County streams.
Critical Areas Package - CAO Resources
Critical Areas Ordinance Fact Sheet: Aquatic Areas (Adobe Acrobat PDF)
Watershed Stewardship Directory
Search for community and non-profit groups, government agencies, and businesses involved in restoring and protecting the water and land resources of King County.
Watersheds: H2Ope for the Future
Local film tells the stories of King County's watersheds-the interconnectedness we share with all living things in a watershed-and why it is important to protect our fragile water resources.
 King County Water Features Map
This color map includes cities as of April, 2000, lakes, rivers, streams, watersheds and sub-basins. Map size will fit 11" x 17" with landscape orientation, or may be plotted at a 300% enlargement to fit 36" x 48" (E size). File format is Adobe Acrobat version 3. File size is 802 Kb. For more maps, see Natural Resources Reference Maps.
Natural
Resource Lands
Look up individual properties protected by King County as open space for their ecological and working resource values. The natural lands site also provides rules on public use and plans describing how properties will be managed.
Projects and Programs
Water Reuse
Learn about reclaimed water, which reduces dependence on fresh water
sources and is useful for irrigation, hvac systems and industrial
processes.
Shoreline
Master Program
Learn about King County's program to protect shorelines, promote
public access, and establish priorities for shoreline uses for the
county's large lakes, rivers and Puget Sound.
Normative Flow Studies
Find out about this Water and Land Resources project that's designed to enhance our knowledge of how river and stream flows affect salmon survival and ecosystem health, for use in managing stormwater, flood hazards and water reuse.
Watershed (WRIA) Planning for Salmon Habitat
Learn about the plans and accomplishments these regional partnerships have acheived in salmon habitat conservation and restoration, promoting the local survival of threatened salmon species.
Stormwater Facilities, Projects and Studies - Interactive Map
Note: this link will open a new browser window
Zoom in to view the full set of GIS layers including the regional, commercial and residential stormwater facilities, neighborhood drainage projects, stormwater studies, and aerial imagery among other things. Viewing information about individual map features may take some practice: choose the "active" (or queryable) map layer from the layers list, select the  tool, and click on one of that layer's features to display associated data.
Hydrography - Interactive Map
Note: this link will open a new browser window
Zoom in to view and query GIS datasets including lakes and streams in King County, drainage areas, King County wetlands inventory, National wetlands inventory, and display aerial photos and USGS topographic map images.
Groundwater Management
Learn what Water and Land Resources has accomplished and plans to accomplish to protect groundwater resources in King County.
Environmental Laboratory
Collects samples from rivers, lakes, marine waters, biosolids application sites, industries and wastewater treatment plants, and analyzes samples in one of several labs including trace metals, organics, conventionals, microbiology and aquatic toxicology labs.
Flood Hazard
Reduction Services
A summary of the roles and responsibilities of King County's Flood
Hazard Reduction Services section, including river facility maintenance,
managing emergency flood response, elevating or relocating of flood-prone
structures, acquiring flood prone lands; flood hazard mapping and
technical assistance to cities and individual landowners, and flood
hazard education. Also, see Flooding
Topics.
Stream Bug Monitoring
 We count on bugs to measure stream health. The bug page provides info about benthic macroinvertebrates including caddis, mayflies, stoneflies, and other aquatic creatures, and how these bugs are used to measure pollution levels, nutrients, and other factors of ecosystem health in King County streams.
Related Topics
Salmon and Trout Topics
Lake Topics
Stormwater Topics
» Look up an individual watershed
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