California’s local agencies advance groundwater sustainability
On March 12, 2026, the Department of Water Resources (DWR) released the final version of California’s Groundwater: Bulletin 118 – Update 2025, the State’s official and most comprehensive report of groundwater monitoring, conditions and management statewide. The report builds upon the previous update in 2020 and contains critical information about the state’s underground reservoir supplies from 2020 to 2024. This period was marked by record-setting dry and wet weather events, as well as increasing ambient temperatures.
“Groundwater plays a critical role in our state’s water supply and today’s report shows what we’ve already known; our changing climate and warmer temperatures will continue to increase demand on groundwater supplies as our hydrology changes and tests our water systems,” said Paul Gosselin, DWR Deputy Director of Sustainable Water Management. “It’s more important than ever that state and local agencies continue to work together to achieve the goals we set for California in order to protect this precious resource and the people who rely on it.”
