The South Pasadena City Council will receive a report detailing the costs of complying with the state mandate in 2017 and 2018. The compliance effort led to several months of discolored water in some South Pasadena households last year as the City switched from a mostly groundwater supply to a purchased water supply.
The project concluded last month with the installation of a $2.7-million water treatment system at Wilson Reservoir that will comply with the state requirements for 1,2,3-Trichloropropane (1,2,3-TCP) and has eliminated the discolored water issues.
The discolored water resulted from a changeover from groundwater supplies to purchased water, which was treated with a different type of purification system. In some homes with older, galvanized pipes, the purchased water caused a reaction that resulted in rusty or yellow discoloration. The discolored water was safe to use, but was inconvenient for residents who had to flush their pipes regularly.