No person may discharge any wastes into any waters of the state which reduce the quality of such waters below the water quality level existing on March 27, 1973. A violation of this section is subject to § 34A-2-75 and may be abated as a public nuisance.

Source: SL 1973, ch 280 , § 8 (2); SDCL Supp, § 46-25-40; SL 1977, ch 190 , § 636; SL 1984, ch 243 , § 4; SL 1992, ch 158 , § 21.