On March 13, 2025, South Dakota Gov. Larry Rhoden signed into law Senate Bill 25, updating the state’s plumbing code to the 2024 Uniform Plumbing Code from the previously adopted 2015 edition. The adoption was initiated and endorsed by the state’s Plumbing Commission and has support from South Dakota’s plumbing industry. 

Senate Commerce and Energy Committee Chairman David Wheeler, acting at the request of the South Dakota Plumbing Commission, sponsored the bill and guided it through the adoption process. The bill passed following a discussion, culminating with a combined bicameral vote of 102 yeas and two nays. 

“This passage and update is a testament to the deep roots, allies, and stakeholder partnerships that IAPMO has been able to forge and sustain in South Dakota,” said Jed Scheuermann, IAPMO vice president of field services. “The work of the chair and the committee was essential, acting as a steady, reliable, and amenable hand leading all the way to the governor’s desk. This update helps South Dakotans have access to a newer code that reflects improvements in water conservation, drinking water quality, and plumbing technology.”

One of the updates from the 2015 UPC to the 2024 UPC was the addition of Appendix M, Peak Water Demand Calculator. The UPC is the result of a multiyear, IAPMO-led effort to develop a new statistically based pipe sizing method stemming from a need to address profound water safety and wasted water and energy concerns due to oversized water supply pipes in homes and buildings.

The UPC requires accredited third-party certification of drinking water treatment devices, fixtures, and components to the relevant American National Standards. The updates within the 2024 UPC are aligned with tested recommendations throughout the plumbing industry. Updates that address the evolving water landscape in South Dakota include new provisions for private well-water tanks, a new Appendix Q addressing plumbing requirements for indoor horticultural facilities, a new Appendix R providing minimum plumbing system requirements for tiny houses and a new Appendix S with provisions pertaining to onsite stormwater treatment systems.