S.C. Code Ann. § 6-11-140

The board of commissioners of any such electric light, water supply, fire protection and sewerage district shall establish and maintain just and equitable rates, rentals or charges for the use of and the service rendered by such works, to be paid by the owner of each and every lot, parcel of real estate or building that is connected with and uses such works by or through any part of the electric light system, water supply system, fire protection system and sewerage system or that in any way is served by such works and may change or adjust such rates or charges from time to time.