§ 51.21  CONNECTION OF PLUMBING FIXTURES TO PUBLIC WATER SEWER SYSTEM.
   (A)   Each building in which plumbing fixtures are installed shall connect to a public water sewer system if available.  A public sewer system is available to a premise used for human occupancy if the property line of the premise is within 200 feet of the system.  A municipality may purchase, lease with purchase option, lease, or otherwise acquire from the owners, or condemn pursuant to SDCL § 9-12-1(2), any preexisting private sewers located within the municipality.
   (B)   The provisions of this section do not apply to municipalities of the first class. Nothing in this section requires any municipality to provide any municipal service outside of its municipal boundaries.
(SDCL § 9-48-53)