Island County GISThis layer shows water system areas and boundaries in Island County as of 2007. The source for each feature is listed in the attribute table. Updates to this layer started in 2017 using Planning and Health Dept data. Various issues of data quality have arose with the delay in updates to this layer. This should be used strictly as a reference.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/1ae0aa7fb81c4e048b71b6647da18fee_0engIsland County Open Data PortalPublicWaterSystems [Washington (State)--Island County]Web servicesWashington (State)--Island CountyWashington (State)Last Modified: 2026-01-08