SD SB128

Data centers operating as large-use customers must implement closed-loop cooling technology, comply with water consumption limits set by the Water Management Board, and submit quarterly water usage reports that will be made public

Large-use customers are defined as customers established after July 1, 2026 with contracted electric demand of 2,000 kilowatts or more

Public utilities must establish separate tariffs for large-use customers that allocate incremental costs proportionally and prohibit shifting costs or rate increases to other customers

Large-use customers may negotiate contracted rates with utilities, subject to Public Utilities Commission approval, provided the contract includes minimum payment obligations and does not subsidize costs through other ratepayers

During energy shortages or when peak demand exceeds supply, large-use customers must curtail electric usage until residential and essential public service demands are met