California is looking to boost water supply and considering new regulations to recycling wastewater straight to your tap. Some refer to it as toilet to tap, however experts in the field say this phrase is anything but accurate. … CBS 8 visited San Diego’s Pure Water project. It’s in phase one of construction and will supply nearly half of the city’s drinking water by the end of 2035. The water goes through a rigorous recycling process. Our crews got to see it all happen at the Pure Water demonstration site. “Five different treatment steps,” said Dough Campbell, the deputy director of Pure Water operations. Campbell said water is treated at a wastewater plant before it ever arrives to Pure Water. Then the water goes through a five step process of ozone, biologically active carbon filters, membrane filters, reverse osmosis and ultraviolet lighting.