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Federal Register / Vol. 86, No. 40 / Wednesday, March 3, 2021 / Rules and Regulations
V. Next Steps As required by SDWA, EPA will initiate the process to propose a NPDWR
for PFOA and PFOS within 24 months of the publication of this document in the Federal Register. For this rulemaking effort, in addition to using the best available science, the Agency will seek recommendations from the EPA Science Advisory Board and consider public comment on the proposed rule. Therefore, EPA
anticipates further scientific review of new science and an opportunity for additional public input prior to the promulgation of the regulatory standard for PFOA and PFOS. Additionally, the Agency will continue to collect and review additional state and other occurrence information during the development of the proposed NPDWR
for PFOA and PFOS. The Agency will not be taking any further regulatory action under SDWA for the six negative determinations at this time.

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