The snowpack in California’s Tuolumne River Basin in the Sierra Nevada is currently larger than the previous four years combined, according to new NASA data. The 2017 California snowpack is near the largest on record, NASA’s data showed. Airborne Snow Observatory (ASO) mapping showed the Tuolumne Basin’s snowpack is twice as large as last year’s and 21 times the volume of 2015, which was the lowest on record.The combined April 1 snow-water equivalent from 2013-2016 adds up to only 92 percent of this year’s April 1 measurement, NASA added.

With their deadline less than three months away, local governments in many critical California groundwater basins still haven’t settled on a local entity to implement the state’s new pumping regulations, a key water official says. Counties, cities and water districts in many areas have submitted “a hodgepodge of overlapping claims” to be their region’s groundwater sustainability agency, said Pat Minturn, who is on the Northern California Water Association’s groundwater committee that’s working with state officials on solutions.

With California’s surface drought over, the state can prioritize investing in groundwater recharge and floodplain restoration to help fight one of its biggest lingering problems: groundwater overdraft. As it does so, the relatively unknown Cosumnes River watershed has emerged as a model. Roughly half of the groundwater basins in California’s Central Valley are critically overdrafted, including the San Joaquin Valley basin to the south of the Cosumnes.