S.D. Codified Laws § 10-4-9.1
Property owned by a public charity and used for charitable purposes is exempt from taxation. A public charity is any organization or society which devotes its resources to the relief of the poor, distressed, or underprivileged. A public charity shall receive a majority of its revenue from donations, public funds, membership fees, or program fees generated solely to cover operating expenses; it shall lessen a governmental burden by providing its services to people who would otherwise use governmental services; it shall offer its services to people regardless of their ability to pay for such services; it shall be nonprofit and recognized as an exempt organization under section 501(c)(3) of the United States Internal Revenue Code, as defined by § 10-1-47; and it may not have any of its assets available to any private interest.
SDCL 10-4-9.1