Los Angeles plans to spend up to $800 million to construct the world's largest groundwater treatment facility in the San Fernando Basin -- a Superfund pollution site -- in an effort to "restore groundwater pumping of drinking water from scores of San Fernando Valley wells that the [Department of Water and Power] began closing in the 1980s" because of pollution. Work on the two plants is slated to begin in five years, and they are expected to be operational in 2022. "By 2035, we plan to reduce our purchases of imported water by half," said James McDaniel, DWP senior assistant general manager.

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