The Metropolitan Water District of Southern California approved a battery energy storage system at the Robert A. Skinner Water Treatment Plant.

The Oct. 13 MWD board vote amended MWD’s capital investment plan to include battery storage systems at three treatment plants and one pumping plant, authorized an agreement with Stantec Inc., for the design of the battery energy storage facilities and found the study portion of the project to be categorically exempt from California Environmental Quality Act review.