1. Paso Robles Groundwater Subbasins, San Luis Obispo County, California, 2013 Datasets Public content 2013. Fugro West, Inc.|Cleath and Associates. This polygon shapefile represents Paso Robles groundwater subbasins data in San Luis Obispo County for 2013. This file was obtained 12/17/2013 by U... San Luis Obispo County (Calif.).