Western Area Power Administration, an agency of the U.S. Department of Energy, Desert Southwest Region. Background photo shows a transmission tower in a desert setting.
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The Desert Southwest Region is one of four regions of the Western Area Power Administration. DSW sells power in Arizona, southern California, and portions of the Southwest, to wholesale customers such as towns, rural electric cooperatives, public utility and irrigation districts, Federal, state, and military agencies, Native American tribes, investor-owned utilities, power marketers, and U.S. Bureau of Reclamation customers.

Desert Southwest Region service area.