California has a large and growing gap between the amount of water available and the amount that people use. This gap can be illustrated by the large and ongoing shortfall in the state’s two primary water sources: the Sacramento-San Joaquin River Delta and California’s groundwater basins, which are collectively overtapped at the rate of about six to seven million acre-feet per year.

But California can fill this gap. This Fact Sheet, produced in collaboration with the Natural Resources Defense Council, outlines four simple solutions with the potential to generate 11–14 million acre-feet of water in new supplies and demand reductions. This is enough water to restore a thriving Delta and replenish depleted aquifers with millions of acre-feet to spare to support population and economic growth.

Issue Brief: The Untapped Potential of California’s Water Supply: Efficiency, Reuse, and Stormwater

Issue Brief: Urban Water Conservation and Efficiency Potential in California

Issue Brief: Stormwater Capture Potential in Urban and Suburban California

Issue Brief: Water Reuse Potential in California