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As announced in the February 2019 EPA per- and polyfluoroalkyl substances (PFAS) Action Plan, EPA is taking steps to address PFAS in the environment and to protect public health. After study of available data regarding wastewater discharges from facilities that manufacture PFAS, the EPA is considering revising wastewater discharge standards, called Effluent Limitations Guidelines and Standards (ELGs), that apply to these facilities. As a preliminary step in the Agency's consideration, the EPA published an advanced notice of proposed rulemaking (ANPRM) to solicit on a voluntary basis additional data and information regarding manufacturers of PFAS and the presence of PFAS in discharges from this industrial category. Also, the EPA solicited on a voluntary basis information regarding PFAS formulators, which are facilities that produce a variety of PFAS products and materials from PFAS feedstocks. PFAS manufacturers and formulators are currently regulated under the Organic Chemicals, Plastics and Synthetic Fibers (OCPSF) ELGs found at 40 CFR Part 414. The OCPSF ELGs, last revised in 1993, currently do not contain discharge standards for PFAS. The EPA will use any data and information obtained via public comment on the ANPRM to inform next steps for this category.