S.D. Codified Laws § 34A-2-107

The secretary shall use the groundwater quality standards promulgated pursuant to §§ 34A-2-10 and 34A-2-11 in prioritizing the groundwater prevention and protection efforts for the state. Other factors that may be considered by the secretary include, but are not limited to, beneficial uses of water, the extent to which a groundwater source supplies or might feasibly supply public water systems or wellhead protection areas established pursuant to § 34A-3A-17, the degree of hazard to public health and welfare, the dependence of local citizens upon groundwater supplies, and the vulnerability of groundwater supplies to contamination.