The Groundwater Accounting Platform is an open-source tool that helps California water managers, landowners, and water users track water budgets and usage more easily in near real-time. Originally developed in 2018 by Rosedale Rio Bravo Water Storage District and Environmental Defense Fund (EDF), the California Water Data Consortium and EDF are partnering to expand the Platform to new regions, and to provide additional features and functionalities to help more groundwater agencies and landowners track water use allocations under California's Sustainable Groundwater Management Act.