This polygon shapefile represents groundwater basins located in Tehama County, California. Tehama County Public Works. (2019). Groundwater Basins, Tehama County, California, 2019. Tehama County Public Works. Available at: http://purl.stanford.edu/dn528ch3848 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.