Governor Jerry Brown's unprecedented action of declaring mandatory water restrictions is intended to achieve a 25 percent reduction in urban water use. But with extended dry weather expected to be part of California's future, that likely won't be enough to keep California's water supply secure.
One idea that always gets floated when the water gets low is desalination, that is taking sea water, removing the salt from it and making it safe for drinking. It sounds appealing, but many worry about the steep cost and environmental impact.
Daniel Potter has been reporting about this for KQED public radio in San Francisco and he joined the show to talk more about it.