water treatment

WATER TREATMENT PLANT SERVING EAST COUNTY AND SAN DIEGO DISTRICTS CITED FOR ERROR

Overall water quality not compromised, but customers are being notified

By Miriam Raftery

Photo:  When completed in 2008, the Twin Oaks Valley Water Treatment Plant was the largest submerged membrane water treatment plant in the world and the first treatment plant built by the San Diego County Water Authority.

July 10, 2019 (San Diego) -- A malfunction at the Twin Oaks Valley Water Treatment Plant resulted in a citation from the state Division of Drinking Water due to a two-day failure of one of its systems that kills harmful organisms. The plant provides water to water districts across San Diego County including East County, but the County Water Authority assures that water in regional pipelines continued to be safe for all uses due to additional treatment processes.