From toilet to tap: Getting a taste for drinking recycled waste water

Story highlightsU.S. and beyond increasingly looking to reusing sewage water for drinkingHalf the world population will face water scarcity by 2030Reused water is completely healthy, but psychological barriers remainSingapore produces large amounts of high-quality recycled waterA third successive year of California's worst drought in a century has the Golden State's reservoirs at record lows. Agriculture has been affected, hitting the local economy, while some small communities risk running out of water.

But business is booming in California's Orange County Water District (OCWD), through a pioneering wastewater treatment facility that recycles used water -- or sewage -- and returns it