Metropolitan Water District of Southern California to Spend One Billion Dollars on Ozone

To ensure Metropolitan Water District of Southern California’s imported water supplies continue to meet increasingly stringent state and federal regulatory regulations, the district is investing more than $1 billion to retrofit its five treatment plants to ozone water treatment. The two-year spending plan calls for $143 million for continued retrofits at the district’s Robert B. Diemer plant in Yorba Linda and the Weymouth plant, with $4 million in work remaining at the Robert A. Skinner and Henry J. Mills treatment plants in Riverside County.