Water will remain the single most decisive factor shaping the San Joaquin region’s economy, landscape, and communities through 2040 and beyond. The combination of the Sustainable Groundwater Management Act’s 2040 deadline, more variable weather patterns, continued population and economic growth, and aging infrastructure creates both serious risks and genuine openings for innovation. How the region manages this resource over the next fifteen years will largely determine whether it can sustain productive agriculture, support growing cities, and maintain the quality of life that residents expect.
The challenge is no longer only about finding more supply. It is about using existing supplies more effectively, storing water when it is abundant, reducing demand where possible, and building institutions flexible enough to handle both drought and flood years.
The 2040 Horizon: SGMA in Practice
The Sustainable Groundwater Management Act, passed in 2014, requires critically overdrafted basins to reach sustainability by 2040. For many basins in the San Joaquin Valley, this means bringing long-term pumping into balance with recharge. Groundwater Sustainability Agencies have developed plans and are now in the implementation phase. Some districts have already begun requiring fallowing, crop shifts, or significant investments in recharge infrastructure.
Early progress is visible in expanded recharge during wet years, better measurement of groundwater levels, and greater coordination among local agencies. Yet the hardest work still lies ahead. In average or dry years, the gap between historical pumping and sustainable yield remains substantial in several basins. The choices made in the next decade—about which lands stay in production, how much new recharge capacity is built, and how costs and benefits are shared—will shape the region’s agricultural footprint and economic base for a generation.