King CountyFor more information about this layer please see the GIS Data Catalog . This data depicts the areas of sewer service for Local Sewer Providers in King County and the KC-WTD Service Area. This data was created for planning and project purposes for King County Wastewater Treatment Division. The data is based upon the best available information including service area boundaries, conveyance pipe locations and Sewer Comprehensive Plans put out by the local providers. This data can/will differentiate from the corporate boundaries for each of the local providers. This data is in no way the final authority, but simply the best available information. If specific questions regarding service areas & local providers arise, the local provider would be the entitly to contact.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c03ea3481bb74540a26b132f265ad49a_0engKing County GIS Open DataPublicSewer Service Areas [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2025-11-14