{"abstract":"The Environmental Protection Agency (EPA) is announcing its withdrawal of the 2011 determination to regulate perchlorate in accordance with the Safe Drinking Water Act, (SDWA). On February 11, 2011, the EPA published a Federal Register document in which the Agency determined that perchlorate met the SDWA's criteria for regulating a contaminant. On June 26, 2019, the EPA published a proposed national primary drinking water regulation (NPDWR) for perchlorate and requested public comments on multiple alternative actions, including the alternative of withdrawing the 2011 regulatory determination for perchlorate. The EPA received approximately 1,500 comments on the proposed rulemaking. The EPA has considered these public comments and based on the best available information the Agency is withdrawing the 2011 regulatory determination and is making a final determination not to regulate perchlorate. The EPA has determined that perchlorate does not occur \"with a frequency and at levels of public health concern\" within the meaning of the SDWA. In addition, in the judgment of the EPA Administrator, regulation of perchlorate does not present a \"meaningful opportunity for health risk reduction for persons served by public water systems.\" Accordingly, the EPA is withdrawing its 2011 determination and is making a final determination not to regulate perchlorate, and therefore will not issue a NPDWR for perchlorate at this time.","action":"Final action.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2020/07/21/2020-13462.html","cfr_references":[{"chapter":null,"citation_url":null,"part":141,"title":40},{"chapter":null,"citation_url":null,"part":142,"title":40}],"citation":"85 FR 43990","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"For purposes of judicial review, the regulatory determination in this document is issued as of July 21, 2020.","disposition_notes":null,"docket_ids":["EPA-HQ-OW-2018-0780, EPA-HQ-OW-2008-0692, EPA-HQ-OW-2009-0297","FRL-10011-21-OW"],"dockets":[],"document_number":"2020-13462","effective_on":null,"end_page":44002,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2020/07/21/2020-13462.xml","html_url":"https://www.federalregister.gov/documents/2020/07/21/2020-13462/drinking-water-final-action-on-perchlorate","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2020-13462?publication_date=2020-07-21","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2020-07-21/2020-13462/mods.xml","not_received_for_publication":null,"page_length":13,"page_views":{"count":5169,"last_updated":"2026-04-04 14:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2020-07-21/pdf/2020-13462.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2020-13462.pdf?1595249114","publication_date":"2020-07-21","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2020/07/21/2020-13462.txt","regulation_id_number_info":{"2040-AF28":{"issue":"202004","html_url":"https://www.federalregister.gov/regulations/2040-AF28/drinking-water-final-action-on-perchlorate","title":"Drinking Water: Final Action on Perchlorate","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202004&RIN=2040-AF28&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["2040-AF28"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"The National Academy of Sciences (NAS) Perchlorate Review: Adverse Effects?","document_id":"EPA-HQ-OW-2009-0297-0685"},{"title":"Iodide Deficiency","document_id":"EPA-HQ-OW-2009-0297-0684"},{"title":"Comment Response Document for the Final Regulatory Determination on Perchlorate (Categorized Public Comments) [EPA 815-R-10-005]","document_id":"EPA-HQ-OW-2009-0297-0681"},{"title":"Drinking Water: Perchlorate Supplemental Request for Comments","document_id":"EPA-HQ-OW-2009-0297-0680"},{"title":"Thyroid Hormone Synthesis and Storage in the Thyroid Gland of Human Neonates","document_id":"EPA-HQ-OW-2009-0297-0678"},{"title":"PBPK Model for Radioactive Iodide and Perchlorate Kinetics and Perchlorate-Induced Inhibition of Iodide Uptake in Humans","document_id":"EPA-HQ-OW-2009-0297-0677"},{"title":"Perchlorate and Radioiodide Kinetics Across Life Stages in the Human: Using PBPK Models to Predict Dosimetry and Thyroid Inhibition and Sensitive Subpopulations Based on Developmental Stage","document_id":"EPA-HQ-OW-2009-0297-0676"},{"title":"Comment-Response Summary Report: Peer Review of Drinking Water Health Advisory For Perchlorate","document_id":"EPA-HQ-OW-2009-0297-0032"},{"title":"Interim Drinking Water Health Advisory For Perchlorate [EPA 822-R-08-025]","document_id":"EPA-HQ-OW-2009-0297-0031"},{"title":"Guidance for Risk Characterization","document_id":"EPA-HQ-OW-2009-0297-0028"}],"comments_count":0,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OW-2009-0297","supporting_documents_count":47,"docket_id":"EPA-HQ-OW-2009-0297","document_id":"EPA-HQ-OW-2009-0297-0690","regulation_id_number":null,"title":"Drinking Water: Perchlorate Supplemental Request for Comments\r\n","checked_regulationsdotgov_at":"2020-07-23T09:00:07Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":43990,"subtype":null,"title":"Drinking Water: Final Action on Perchlorate","toc_doc":"Perchlorate","toc_subject":"Drinking Water:\n","topics":["Administrative practice and procedure","Chemicals","Environmental protection","Indians-lands","Intergovernmental relations","Radiation protection","Reporting and recordkeeping requirements","Water supply"],"type":"Rule","volume":85}