California’s historic drought has forced local communities to find new water supplies. But where? Some coastal cities are looking to the ocean, contemplating desalination projects that once were dismissed as too energy-intensive and expensive. Meanwhile, Orange County has looked to the toilet—turning sewage into drinking water in a process called toilet to tap—and other counties, Los Angeles among them, are preparing to follow suit. What are the risks of turning salty or dirty water into potable water? What other ways exist to recycle water in the U.S. and around the world? And, can we ever reuse enough water to supply the needs of big, dry cities like Los Angeles? 

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