EnvironmentStormwater Capture: California's Untapped SupplyJune 23, 2015 | Amy QuintonWhen it rains in California, millions of gallons of water run down city streets, into storm drains and out to the Pacific Ocean. Some cities are capturing it by soaking it up like a sponge. It may be California's next big untapped water supply. Listen /Update RequiredTo play audio, update browser or Flash plugin.