SPECIAL REPORT: This is the first of two stories about Sustainable Groundwater Management Act’s (SGMA) impact reported from the San Joaquin Valley. October 21, 2024 – By Caleb Hampton – The value of farmland in parts of the San Joaquin Valley, California’s agricultural heartland, has fallen rapidly this year as commodity prices lag and implementation of the state’s Sustainable Groundwater Management Act casts a shadow on the future of farming in the region.