On February 17, 2022, the Board proposed—for public comment—an amendment to Illinois’ wastewater pretreatment rules. The amendment will keep these rules “identical in substance” to those of the United States Environmental Protection Agency (USEPA). The Board’s rulemaking responds to a single USEPA action taken during the first half of 2021. On May 19, 2021, USEPA updated the methods for analyzing contaminants in wastewater, including for wastewater pretreatment. USEPA’s analytical methods are incorporated by reference in the Illinois wastewater pretreatment rules, and simply updating that incorporation by reference will complete Board rulemaking on USEPA’s action.
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