This article is intended to aid the state and county in the execution of its duties by providing an appropriate and independent instrumentality of the state and of the county with full and adequate powers to fulfill its functions. It is the further legislative intent that the DeKalb County Water Authority develop a master plan of operation for the water authority in consultation with all existing water authorities in and adjoining DeKalb County and any county or local governments for the purpose of determining the method by which public water services, garbage disposal, and sewer service can be provided to the citizens of the county or area served by the authority.