Groundwater basin (IMAGE) University of California - Santa Cruz Caption California’s Sustainable Groundwater Management Act (SGMA) requires more than 100 groundwater basins around the state to bring their aquifers into balance by 2040. Credit Photo courtesy of Andrew Fisher Usage Restrictions n/a License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.