Sewage - As enacted, prohibits a municipal sewer system or utility district that has operated a sewerage system outside of the corporate boundaries of the city or town for 25 years or more from ceasing operation of the sewerage system outside the corporate boundaries so long as the sewerage system maintains sufficient capacity; requires a utility system that provides wastewater service to provide a connection to the owner of real property for wastewater service when the utility system meets certain requirements. - Amends TCA Title 7, Chapter 35; Title 7, Chapter 82 and Title 68, Chapter 221.

HB 543 prevents cities, towns, and utility districts from ending wastewater service outside their official boundaries if they've provided that service for 25 years or more, as long as the system maintains sufficient capacity. The bill requires a Tennessee advisory commission study to confirm capacity levels before any discontinuation can occur. It also mandates that utility systems must connect property owners to wastewater service when specific requirements are met. This law directly affects communities and property owners relying on long-standing sewer infrastructure beyond municipal limits.