The large trunk line sanitary sewers in the City of Westlake Village are owned and operated by Las Virgenes Municipal Water District, which also owns and operates the sewer treatment plant known as the Tapia Water Reclamation Facility.
The sewer mains that reach from the trunk lines into the neighborhoods and business districts are owned by the City and maintained by the Consolidated Sewer Maintenance District of LA County.
The property laterals that leave the mains in the streets and connect to individual houses and businesses are owned and maintained by the property owner, including the entire length of pipe to the connection point at the City sewer.