S.D. Codified Laws § 34A-2-45
Inspection powers with respect to pollution sources
The secretary shall, at reasonable times, have access to any point source, including an industrial user of a publicly owned treatment works, and copy any records, inspect any monitoring equipment or method required under § 34A-2-44 , to sample any effluents being discharged into the waters of the state, or to ensure compliance with the provisions of this chapter.
Source: SL 1973, ch 280, § 6 (9); SDCL Supp, § 46-25-61; SL 1988, ch 285, § 14.