Pure Water San Diego is an advanced water purification program that will provide nearly half of San Diego’s water supply locally by the end of 2035. Beyond these direct benefits to the region’s local water supply, Pure Water ensures the City of San Diego is in compliance with federal regulations and the Clean Water Act. Once complete, Pure Water will significantly reduce treated discharges from the Point Loma Wastewater Treatment Plant into the Pacific Ocean. For additional information please visit the City of San Diego’s website .