City of Seattle ArcGIS OnlineThe polygons are intended for use by the City of Seattle as planning-level tool for a preliminary understanding of the drainage patterns in particular areas of the City. The layer is not complete and does not reflect any City determination about how specific locations should be characterized. Data source is DWW. DIRECT_DISCHARGE_PLGN_PV. Maintained by SPU USM. This layer does not display when zoomed out beyond 1:200,000. Labels are based on the attribute ID. Refreshed weekly.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/19c83ab2c1324a9e81b79f2ac298ba28_0engSeattle GeoDataPublicSPU DWW Direct Discharge Areas [Washington (State)--Seattle]Web servicesWashington (State)--SeattleWashington (State)Last Modified: 2026-01-05