West Basin Municipal Water District, Los Angeles, California (www.westbasin.org)
West Basin treats water from the City of Los Angeles’ Hyperion Wastewater Treatment Plant and is the only wastewater recycling facility in the world that produces five different qualities of supply (referred to as “designer waters”) for specific purposes. Those waters include irrigation water, cooling tower water, high-pressure boiler feed water, low-pressure boiler feed water and seawater intrusion and groundwater augmentation water. A total of 80 per cent of the water ends up in the groundwater augmentation water, which is the source of drinking water. The seawater intrusion barrier water protects approximately 200 million dollars worth of local groundwater from seawater contamination. West Basin has approximately 100 miles of purple pipe and 300 sites that use recycled water fit for their specific purpose. West Basin has produced more 150 billion gallons of water to date. The plant originally opened in 1995 and has been expanded four times. Ten per cent of the plant’s power comes from solar panels on the facility’s reservoirs.