{"abstract":"The Safe Drinking Water Act (SDWA), as amended in 1996, requires the Environmental Protection Agency (EPA) to make regulatory determinations every five years on at least five unregulated contaminants. A regulatory determination is a decision about whether or not to begin the process to propose and promulgate a national primary drinking water regulation (NPDWR) for an unregulated contaminant. These unregulated contaminants are chosen from the Contaminant Candidate List (CCL), which SDWA requires the agency to publish every five years. EPA published the third CCL (CCL 3) in the Federal Register on October 8, 2009. This notice presents the preliminary regulatory determinations and supporting rationale for 5 of the 116 contaminants listed on CCL 3. The agency is making preliminary determinations to regulate one contaminant (i.e., strontium) and to not regulate four contaminants (i.e., 1,3-dinitrobenzene, dimethoate, terbufos and terbufos sulfone). EPA seeks comment on these preliminary determinations.","action":"Request for public comment.","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/2014/10/20/2014-24582.html","cfr_references":[{"chapter":null,"citation_url":null,"part":141,"title":40}],"citation":"79 FR 62716","comment_url":null,"comments_close_on":"2014-12-19","correction_of":null,"corrections":[],"dates":"Comments must be received on or before December 19, 2014, 60 days after publication in the Federal Register.","disposition_notes":null,"docket_ids":["EPA-HQ-OW-2012-0155","FRL-9917-87-OW"],"dockets":[],"document_number":"2014-24582","effective_on":null,"end_page":62750,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2014/10/20/2014-24582.xml","html_url":"https://www.federalregister.gov/documents/2014/10/20/2014-24582/announcement-of-preliminary-regulatory-determinations-for-contaminants-on-the-third-drinking-water","images":{"EP20OC14.000":{"large":"https://img.federalregister.gov/EP20OC14.000/EP20OC14.000_large.png","medium":"https://img.federalregister.gov/EP20OC14.000/EP20OC14.000_medium.png","original_size":"https://img.federalregister.gov/EP20OC14.000/EP20OC14.000_original_size.png"}},"images_metadata":{"EP20OC14.000":{"large":{"identifier":"EP20OC14.000","content_type":"image/png","size":119249,"width":822,"sha":"e95ae8d3ff4fc2d74c85b0725f1c44f9","url":"https://img.federalregister.gov/EP20OC14.000/EP20OC14.000_large.png","height":663},"medium":{"identifier":"EP20OC14.000","content_type":"image/png","size":17478,"width":397,"sha":"274cf1a4a98c321304bb992227a71a3a","url":"https://img.federalregister.gov/EP20OC14.000/EP20OC14.000_medium.png","height":320},"original_size":{"identifier":"EP20OC14.000","content_type":"image/png","size":146679,"width":1498,"sha":"79fdc206ea4354cd7fcb2fc19afa0b33","url":"https://img.federalregister.gov/EP20OC14.000/EP20OC14.000_original_size.png","height":1208}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2014-24582?publication_date=2014-10-20","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2014-10-20/2014-24582/mods.xml","not_received_for_publication":null,"page_length":35,"page_views":{"count":4459,"last_updated":"2026-09-23 02:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2014-10-20/pdf/2014-24582.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2014-24582.pdf?1413550120","publication_date":"2014-10-20","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2014/10/20/2014-24582.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"supporting_documents":[{"title":"USEPA. 2015a. Drinking Water Contaminant Candidate List 4 - Draft; Notice","document_id":"EPA-HQ-OW-2012-0155-0032"},{"title":"USEPA, 2000. Methodology for Deriving Ambient Water Quality Criteria for the Protection of Human Health (2000) [EPA 822-B-00-004]","document_id":"EPA-HQ-OW-2012-0155-0031"},{"title":"USEPA, 2015c. Occurrence Data from the Second Unregulated Contaminant Monitoring Regulation (UCMR 2). Including Appendices A-C. EPA 815-R15-013. December 2015","document_id":"EPA-HQ-OW-2012-0155-0030"},{"title":"USEPA, 2015b. Regulatory Determinations 3 Support Document (Final). EPA 815-R15-014. December 2015","document_id":"EPA-HQ-OW-2012-0155-0029"},{"title":"USEPA, 2015. Responses to Public Comments on Preliminary Regulatory Determinations for Contaminants on the Third Drinking Water Contaminant Candidate List.  EPA Publication # 810-R-15-001. December 2015","document_id":"EPA-HQ-OW-2012-0155-0028"},{"title":"Preliminary Regulatory Determinations FR Notice OMB Review Redline Strikeout April 14, 2014","document_id":"EPA-HQ-OW-2012-0155-0010"},{"title":"Memo to Docket regarding OMB Changes April 2014","document_id":"EPA-HQ-OW-2012-0155-0009"},{"title":"Preliminary Regulatory Determinations 3 Strontium References","document_id":"EPA-HQ-OW-2012-0155-0008"},{"title":"Preliminary Regulatory Determinations 3 Terbufos and Terbufos Sulfone References","document_id":"EPA-HQ-OW-2012-0155-0007"},{"title":"Preliminary Regulatory Determinations 3 Dimethoate References","document_id":"EPA-HQ-OW-2012-0155-0006"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OW-2012-0155","supporting_documents_count":14,"docket_id":"EPA-HQ-OW-2012-0155","regulation_id_number":null,"title":"Announcement of Preliminary Regulatory Determinations for Contaminants on the Third Drinking Water Contaminant Candidate List","checked_regulationsdotgov_at":"2015-01-12T19:45:53Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":62716,"subtype":null,"title":"Announcement of Preliminary Regulatory Determinations for Contaminants on the Third Drinking Water Contaminant Candidate List","toc_doc":"Preliminary Regulatory Determinations for Contaminants on the Third Drinking Water Contaminant Candidate List","toc_subject":null,"topics":[],"type":"Proposed Rule","volume":79}