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The Metropolitan Water District of Southern California
Exchanges & Water Banking
Metropolitan works with its member agencies and other agencies across Southern California to maximize the region's groundwater storage and increase flexibility in how water resources are managed.  Management tools include water exchanges, transfers and conjunctive use programs for local groundwater basins.  This is important for water supply reliability as the region is able to increase groundwater storage during wet periods by storing imported surface water to better prepare for California's inevitable dry periods.  Metropolitan currently has nine groundwater storage projects within its service area, providing over 200,000 acre-feet of storage capacity.