Policy Brief Policy Brief: Drought and Groundwater Sustainability in California’s Farming Regions By Spencer Cole, Ellen Hanak, Alvar Escriva-Bou, Josué Medellín-Azuara Jun 24, 2024 As the Sustainable Groundwater Management Act approaches its tenth anniversary, it’s clear that California is making progress towards implementation—but the 2020–22 drought shows that much work still lies ahead.