Washinton State Department of HealthPolygons depict time of travel estimates for active public drinking water supplies. Source location data were obtained from the Washington State Department of Health, Office of Drinking Water.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c9af643a0c264bf4afecefe02964d154_0engState of Washington Geospatial Open Data PortalPublicWellhead Protection Areas [Washington (State)]Web servicesWashington (State)Last Modified: 2021-02-15