Washington 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. Data is updated Monday mornings. Check the "Data updated:" date in the Details section. Metadata dates are not automatically updated.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/17d734f3ee714b4c848f71c9cdf3dbd3_0engState of Washington Geospatial Open Data PortalPublicWellhead Protection Areas (1 year) [Washington (State)]Web servicesWashington (State)Last Modified: 2023-10-16