King CountyFor more information about this layer please see the GIS Data Catalog . Locations of groundwater sources organized into 3 categories (as defined by the attribute SRC_TYPE) providing all known sources whether domestic or public water systems (PWS). PWS are either Group A with 15 or more connections or Group B with 2 to 14 connections, as recorded by the WA Department of Health.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/6122084e949e452d8e313c83d3246178_0engKing County GIS Open DataPublicGroundwater Sources [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2026-01-03