King CountyFor more information about this layer please see the GIS Data Catalog . All of the conveyance involved in treatment of wastewater for King County Wastewater Treatment DivisionArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c48c1d65b67b495ca7c962b61b9c47fb_0engKing County GIS Open DataPublicWastewater Conveyance of King County [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2026-01-03