Pretreatment & Source Control
Non-Reclaimable Wastewater
The Agency operates the Non-Reclaimable Wastewater System (NRWS) which provides the disposal mean for discharges of high-salt-content industrial wastewater. This wastewater is not suitable to be treated at the Agency’s treatment plants. The NRWS transports non-reclaimable, salt-laden, industrial strength wastewater out of the Agency’s service area, to other treatment facilities in Los Angeles and Orange counties, and eventual discharge to the Pacific Ocean.
The NRWS was conceived early in the Agency’s history. In 1966, voters approved a $16 million general obligation bond issue to finance the purchase of hydraulic/treatment capacity and the construction of two major NRWS trunk lines.
The North NRWS consists of three trunk lines: north, central and south trunk lines, which collect industrial wastewater discharges and convey the combined discharge to the County Sanitation Districts of Los Angeles County's sewer system. The South NRWS is to serve industries in the south service area of the Agency and the combined discharge is conveyed to the sewer system of the Orange County Sanitation District.
As of June 30, 2006, there are 42 companies having discharge pipeline connection to the NRWS. These companies include many well-known industries such as California Steel Industries, Inc.; Coca-Cola Company; Temple-Inland, Inc.; Mission Linen and Uniform Service; James Hardie Building Products, Inc.; Frito Lay, Inc.; Cintas Corp.; and Sunkist Growers, Inc. In addition, there are about 12 companies that transport their wastewater to the NRWS discharge stations.