On September 8, 2021, the U.S. Environmental Protection Agency (EPA or the Agency) released Preliminary Effluent Program Plan 15 (Preliminary Plan 15), which outlines the Agency’s 2020 annual review of effluent guidelines and pretreatment standards (ELG), identifies new or existing industrial categories for ELG rulemaking, and provides an update on the Agency plan to improve its annual review and biennial planning process. (more…)