Groundwater Sustainability Plan for the Spadra Basin

The Spadra Basin is a small, non‐adjudicated subbasin of the San Gabriel Valley Basin (Basin 4-013 as defined by DWR). The DWR designated the San Gabriel Valley Basin as a “very low‐priority” basin mainly because groundwater pumping rights across most of the basin have been adjudicated. SGMA does not require that a GSP be prepared for the basin, however the legislation “encourages and authorizes” basins designated as very low priority to be managed under a GSP.