Southern California’s Metropolitan Water District has commissioned Xylem as part of a project at its FE Weymouth Water Treatment Plant to retrofit biologically active filtration and ozone. Xylem will supply its Leopold Type XA underdrains with IMS 200 media retainers and Leopold dual media sand and anthracite to the 75-year-old plant which treats water from the Colorado River Aqueduct and the State Project Water (SPW) California Aqueduct.