Cal. Water Code § 33101

The State and the people thereof have a primary and supreme interest in securing to the inhabitants and property owners within the Coachella Valley and adjacent land in Riverside County the greatest possible use and conservation of, and protection from, the waters naturally flowing into the valley from the surrounding mountainous watershed and the greatest possible use of other waters available to the area, thereby assuring that the greatest productivity of the largest possible area may be accomplished and safely carried on within reasonable limits of economy.