Oregon Department of Environmental Quality, Water Quality Division.This polygon layer contains a spatial representation of a geographic area that is designated as a Groundwater Management Area for the Southern Willamette Valley in Oregon.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/a4e8f5a3195c475cb00b6a341dcdad3b_0engOregon GEOHubPublicGroundwater Management Area So Willamette Valley [Oregon]Web servicesOregonLast Modified: 2023-06-28