On May 16, 2024, the Board adopted amendments to keep Illinois’ wastewater pretreatment regulations “identical in substance” to the federal regulations. The amendments reflect action taken by the United States Environmental Protection Agency (USEPA) during the first half of calendar year 2023. USEPA amended a provision of the steam electric power generating point source category within the effluent limitation guidelines. Specifically, USEPA extended the date by which existing coal-fired power plants must submit a notice if they plan to participate in a subcategory of electric generating units permanently ceasing coal combustion by December 31, 2028. The Board added the extended deadline to the Illinois sewer discharge criteria rules for steam electric power generating.
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