S.D. Codified Laws § 49-34A-2
Service required of utilities
Every public utility shall furnish adequate, efficient, and reasonable service.
Source: SL 1970, ch 261, § 32; SDCL Supp, § 49-41-9.1; SL 1975, ch 283, § 2.
S.D. Codified Laws § 49-34A-2