A multi-barrier treatment process uses advanced technology to replicate the natural water cycle, only faster. This is being done at the Silicon Valley Advanced Water Purification Center (SVAWPC). The water purification process includes microfiltration, reverse osmosis, and ultraviolet light disinfection. An additional final Advanced Oxidation UV step would be added to the purified water if it were to be used for more than traditional recycled water uses such and to be used to augment drinking water supply, which is regulated by the Division of Drinking Water under the State Water Resources Control Board.