This growing region needs more water, and it’s spending hundreds of millions to get it. A $72 million plant opened here in 2014 to turn wastewater into drinking water, and the Santa Clara Valley Water District is planning to build five more plants to purify water in the region

Water is scarce and expensive in California, and facilities like this one, the Silicon Valley Advanced Water Purification Plant, use some of the most advanced technology in the world to make sure Silicon Valley’s booming population will have water when it turns on the tap.