Plant 134, the District’s surface water treatment facility, operates five water filtration trains, each equipped with 180 membrane filters. The membrane manufacturer recommends replacement every 5 to 7 years to maintain treatment efficiency and reduce maintenance needs.
Beginning in FY 2017-18, the District initiated a phased replacement of the membranes, replacing one train per year over four years. Replacement of the fifth train was deferred due to funding priorities and improved in-house repair capabilities, with those membranes ultimately replaced in FY 2023-24. In FY 2026-27, the District will restart the membrane replacement cycle, beginning with Train 1, which has now been in service for seven years. A budget of $460,000 has been allocated for this work.