The Western States Federal Agency Support Team (WestFAST) is a collaboration between 11 Federal agencies with water management responsibilities in the West. WestFAST was established to support the Western States Water Council (WSWC), and the Western Governors Association in coordinating Federal efforts regarding water resources.

The Declaration of Cooperation states: "We hereby declare that we as WestFAST partners will collaborate with the Western States Water Council to guide the development of an appropriate action plan for this partnership."