“SGMA uses Department of Water Resources Bulletin 118 to define basins and sub basins and assign them numbers. The San Joaquin Valley Basin is number 5-22.
Within it are sub basins with their numbers following a decimal. Each sub basin one Groundwater Sustainability Agency or several, but DWR will only recognize one representative GSA per sub basin.
Each GSA must develop a Groundwater Sustainability Plan on its own or as a contribution to an overarching GSP as again, DWR will only deal with one GSP per sub basin. … ”
Continue reading at Cal Ag Today here: SGMA Update: List of SGMA GSAs and GSPs