Each governmental unit within the State of Wisconsin is required to conduct, complete and maintain an inventory of all POWTS located within their jurisdictional area. The inventory does not require site visits, POWTS identification, or an evaluation of the POWTS. Upon completion of the inventory, the governmental unit shall develop and implement a comprehensive POWTS maintenance program, which is a process that accepts and records inspections, evaluations, maintenance, and servicing reports submitted by the POWTS owner or owner’s agent. Every POWTS shall be visually inspected at least once every three years to determine whether wastewater or effluent from the POWTS is ponding on the surface of the ground.