S.D. Codified Laws § 34A-6-87
It is unlawful to willfully dispose of solid waste in a manner inconsistent with the provisions of this chapter. Illegal disposal of solid waste in a quantity less than ten pounds shall constitute littering as provided in chapter 34A-7. Any person illegally disposing of solid waste in a quantity of ten pounds or more, but less than two thousand pounds or who unintentionally disposes of solid waste in excess of two thousand pounds in a manner inconsistent with this chapter is guilty of illegal dumping in the second degree. Any person who knowingly and intentionally disposes of solid waste in a manner inconsistent with the provisions of this chapter in a quantity in excess of two thousand pounds is guilty of illegal dumping in the first degree. Illegal dumping in the first degree is a Class 6 felony. Illegal dumping in the second degree is a Class 1 misdemeanor.
SDCL 34A-6-87