S.D. Codified Laws § 9-44-7
In the case of water and sewer improvements undertaken pursuant to chapters 9-47 and 9-48, the municipality may agree to establish, impose, and collect just and equitable charges for services furnished by such improvement or improvements, and to pledge and appropriate all or any portion of the net revenues derived from such charges to the improvement fund for payment of municipal improvement bonds and interest. The municipality may further agree to establish and maintain such rates as shall at all times be at least sufficient to produce net revenue which, together with collections of assessments and taxes, will be adequate to pay the principal of and interest on each and all of the bonds as such principal and interest become due. In connection with such service charges, the governing body shall have all of the rights and powers which it would have with respect to like matters under chapter 9-40.
SDCL 9-44-7