The Sacramento-San Joaquin Delta has been called the heart of California's water system, one of the largest sources of water for the world's 8th largest economy.
It's also home to half a million people. And the Delta is the largest estuary on the west coast. But its ecosystem is in trouble and fish are dying.
Now, as the state grapples with a severe water shortage and as lawmakers, conservationists, farmers, fisherman, policy experts and others debate the Bay Delta Conservation Plan, we offer this 30-minute audio journey.
Environment reporter Amy Quinton traveled from Oroville to San Diego and throughout the Delta region to bring you the sounds and stories of the Delta, to illustrate how it both connects and divides Californians.