The State and the people thereof have a primary and supreme interest in securing to the inhabitants, property owners and water users within the City of Costa Mesa, the Newport Heights Irrigation District, the Fairview County Water District, and the Newport Mesa County Water District, the greatest possible efficient use and conservation of waters, both local and imported, that may be accomplished economically. Investigation has shown that the water supply problem of the Costa Mesa area and of Orange County is peculiar to that area and it is hereby declared that a general law cannot be made applicable thereto. It is hereby declared necessary for the proper reorganization of water supply, storage, conservation and use that this part be adopted to provide the means of eliminating expensive and wasteful duplication of water systems and securing a greater economy and efficiency of administration.