update provisions related to certain large-use customers of utilities.

SB 128 requires data centers (defined as facilities managing electronic data) to notify local water providers about projected water use and implement closed-loop cooling systems that limit net water withdrawal. It prohibits these facilities from exceeding water usage limits after residential and essential public services are allocated, and mandates reduced use during declared water shortages. Data centers must submit quarterly public reports detailing water usage and compliance. The bill directly affects large data center operators in South Dakota, focusing on sustainable water management for this growing sector.