(1) Is privately owned and is operated under the collective management and control of the owners;
(2) Was in the business of providing water supply and sewerage collection and disposal prior to July 1, 1978;
(3) Has continuously owned a sanitary sewerage system since July 1, 1978, permitted by the Environmental Protection Division of the Department of Natural Resources; and
(4) On May 1, 2000, owns and operates one or more sewerage collection treatment and disposal systems serving 1,000 or more customers