Groundwater quality in the approximately 620-square-mile (1,600-square-kilometer) San Francisco Bay study unit was investigated as part of the Priority Basin Project of the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The study unit is lo
Parsons, Mary C. mparsons@usgs.gov,Kulongoski, Justin T.,Belitz, Kenneth kbelitz@usgs.gov. Status and understanding of groundwater quality in the San Francisco Bay groundwater basins, 2007???California GAMA Priority Basin Project. 2013-01-01.