As California labored under a severe drought for more than five years, industry and media debated the pros and cons of desalination coming to the rescue of the drought-stricken state. About a dozen or so desalination plants have been planned or proposed up and down the Golden State’s coast, with the 50 million gallon (189m liter) per day Carlsbad desalination plant opened in December 2015 and Santa Barbara’s smaller desalination facility set to open this spring.