SDCL § 46-6-27: Plugging, sealing, or capping abandoned wells required--Rules.

If the owner of an existing well drills a replacement well and if the owner has no plan to use the existing well, the existing well is considered abandoned. The well owner shall plug the abandoned well within thirty days after the new well is ready for use. Any well that is being used or is not considered abandoned shall be sealed or capped at the surface. The Water Management Board shall promulgate rules pursuant to chapter 1-26 providing for plugging, capping, or sealing of wells to protect the health and safety of the public and to prevent contamination of groundwater by surface waters.