Title 22 distribution system. The distribution system is connected to recycled water users throughout the South Bay. These users include parks, golf courses, schools, cemeteries, green belt areas, oil refineries and other industries. Additionally, the Mobil Boiler Feedwater Plant takes in Title 22 Water and further treats it using microfiltration followed by reverse osmosis. The product from the reverse osmosis process is fed to dimineralizers, and this high-quality water is then used in the refinery's boilers.
Some industries require that the recycled water be further treated to remove ammonia.
Ammonia occurs naturally in the supply water and must be removed to prevent corrosion of certain types of metals. West Basin's largest customers, Mobil and Chevron, have these nitrification facilities located near their refineries. To protect the South Bay's groundwater basin against seawater intrusion, a series of injection wells producing a hydraulic barrier of freshwater are located along the coast. Through a 12-mile long series of more than 100 wells, freshwater is injected into the groundwater basin. For 40 years, the barrier has been injected with imported surface water.