On June 17, 2021, the Board adopted amendments to Illinois’ wastewater pretreatment rules. The amendments keep these rules “identical in substance” to those of the United States Environmental Protection Agency (USEPA). The Board’s rulemaking responded to amendments adopted by USEPA during the second half of 2020, as detailed below. In addition, the Board included a few non-substantive corrections to base text that were not derived from USEPA actions.
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