Dr. Benjamin Maki

Ben joined Stanford's Earth System Science department as a postdoctoral scholar in February 2026, after completing his Ph.D. in Environmental Toxicology, with a designated emphasis in Public Policy, at the University of California Riverside. He is currently working on a series of projects related to the sustainable management of groundwater resources in California's Central Valley, where his work is focused within the context of managed aquifer recharge (MAR). MAR is a suite of methods used to redirect excess surface water into groundwater systems and has emerged as a key strategy to bank freshwater and restore groundwater levels throughout California. More specifically, his work focuses on better understanding the potential risks to groundwater quality posed by naturally occurring geogenic contaminants during recharge efforts, where changes to native geochemical conditions during recharge can result in the inadvertent mobilization of toxic naturally occurring contaminants, such as arsenic, uranium, chromium, and manganese. Current work funded through the Stanford Sustainability Accelerator, and in partnership with the Madera Irrigation District among other community partners, aims to establish a simple, functional multi-user focused toolkit to aid in effectively and safely scaling groundwater recharge efforts throughout the state. Importantly, this work focuses on both understanding community level concerns during local groundwater recharge projects, while simultaneously establishing effective groundwater quality monitoring protocols and designing simple, scalable, and effective field-scale management solutions to protect long-term groundwater quality. When not thinking about groundwater replenishment, Ben enjoys time with friends, family, and his partner Al and dog Rupert. He spends the bulk of his free time surfing on the California coast, exploring the Bay Area by bicycle and campervan, travelling to as many new places as possible, and enjoying live music, and good food and company along the way!