{"abstract":"The 1996 amendments to the Safe Drinking Water Act (SDWA) require that the United States Environmental Protection Agency (EPA or the agency) establish criteria for a program to monitor unregulated contaminants and publish a list of up to 30 contaminants to be monitored every five years. This final rule meets the SDWA requirement by publishing the third Unregulated Contaminant Monitoring Regulation (i.e., UCMR 3), listing the unregulated contaminants to be monitored and addressing the requirements for such monitoring. This final rule describes analytical methods to monitor for 28 chemical contaminants and describes the monitoring for two viruses. UCMR 3 provides EPA and other interested parties with scientifically valid data on the occurrence of these contaminants in drinking water, permitting the assessment of the number of people potentially being exposed and the levels of that exposure. These data are one of the primary sources of occurrence and exposure information the agency uses to develop regulatory decisions for these contaminants. In addition, as part of an Expedited Methods Update, this rule finalizes amendatory language for a drinking water inorganic analysis table (\"Inorganic chemical sampling and analytical requirements\") in the Code of Federal Regulations (CFR). This minor editorial correction to the table does not affect the UCMR program.","action":"Final rule.","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/2012/05/02/2012-9978.html","cfr_references":[{"chapter":null,"citation_url":null,"part":141,"title":40},{"chapter":null,"citation_url":null,"part":142,"title":40}],"citation":"77 FR 26072","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":["https://www.federalregister.gov/api/v1/documents/C1-2012-9978","https://www.federalregister.gov/api/v1/documents/C2-2012-9978"],"dates":"This final rule is effective on June 1, 2012. For purposes of judicial review, this rule is promulgated as of 1 p.m. Eastern time on May 16, 2012 as provided in 40 CFR 23.7. The incorporation by reference of certain publications listed in this rule is approved by the Director of the Federal Register as of June 1, 2012.","disposition_notes":null,"docket_ids":["Docket No. EPA-HQ-OW-2009-0090","FRL-9660-4"],"dockets":[],"document_number":"2012-9978","effective_on":"2012-06-01","end_page":26101,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2012/05/02/2012-9978.xml","html_url":"https://www.federalregister.gov/documents/2012/05/02/2012-9978/revisions-to-the-unregulated-contaminant-monitoring-regulation-ucmr-3-for-public-water-systems","images":{"ER02MY12.000":{"large":"https://img.federalregister.gov/ER02MY12.000/ER02MY12.000_large.png","medium":"https://img.federalregister.gov/ER02MY12.000/ER02MY12.000_medium.png","original_size":"https://img.federalregister.gov/ER02MY12.000/ER02MY12.000_original_size.png"}},"images_metadata":{"ER02MY12.000":{"large":{"identifier":"ER02MY12.000","content_type":"image/png","size":50070,"width":823,"sha":"550937dda218fe98a8dbb850b2111467","url":"https://img.federalregister.gov/ER02MY12.000/ER02MY12.000_large.png","height":739},"medium":{"identifier":"ER02MY12.000","content_type":"image/png","size":24389,"width":518,"sha":"f931d3afcd3396b2d1c56f9e5fff7267","url":"https://img.federalregister.gov/ER02MY12.000/ER02MY12.000_medium.png","height":465},"original_size":{"identifier":"ER02MY12.000","content_type":"image/png","size":106558,"width":3912,"sha":"dc96839187cda4c58a84cbee721fb6fa","url":"https://img.federalregister.gov/ER02MY12.000/ER02MY12.000_original_size.png","height":3515}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2012-9978?publication_date=2012-05-02","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2012-05-02/2012-9978/mods.xml","not_received_for_publication":null,"page_length":30,"page_views":{"count":14981,"last_updated":"2026-08-25 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2012-05-02/pdf/2012-9978.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2012-09978.pdf?1335876506","publication_date":"2012-05-02","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2012/05/02/2012-9978.txt","regulation_id_number_info":{"2040-AF10":{"issue":"201110","html_url":"https://www.federalregister.gov/regulations/2040-AF10/revisions-to-the-unregulated-contaminant-monitoring-regulation-ucmr-3-for-public-water-systems","title":"Revisions to the Unregulated Contaminant Monitoring Regulation (UCMR 3) for Public Water Systems","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201110&RIN=2040-AF10&operation=OPERATION_EXPORT_XML","priority_category":"Other Significant"}},"regulation_id_numbers":["2040-AF10"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Information Collection Request for the Unregulated Contaminant Monitoring Rule (UCMR) Renewal ICR Supporting Statement 150826","document_id":"EPA-HQ-OW-2009-0090-0153"},{"title":"UCMR3 Renewal ICR SuppStatement 150318","document_id":"EPA-HQ-OW-2009-0090-0150"},{"title":"Email: Question Regarding UCMR 3 524.3 from SCWA","document_id":"EPA-HQ-OW-2009-0090-0146"},{"title":"Email: Questions regarding Multi-Lab MRL Calculations / Understanding Technical Support Document from AWWA","document_id":"EPA-HQ-OW-2009-0090-0145"},{"title":"Response to Comments Document for the Unregulated Contaminant Monitoring Regulation (UCMR 3) [EPA 815-R-11-004]","document_id":"EPA-HQ-OW-2009-0090-0144"},{"title":"Information Collection Request for the Unregulated Contaminant Monitoring Regulation (UCMR 3)","document_id":"EPA-HQ-OW-2009-0090-0143"},{"title":"Announcement of Final Rule: Unregulated Contaminant Monitoring Rule (UCMR 3) for Public Water Systems","document_id":"EPA-HQ-OW-2009-0090-0142"},{"title":"UCMR 3 Chemical Contaminants – Information Compendium","document_id":"EPA-HQ-OW-2009-0090-0141"},{"title":"UCMR 3 Laboratory Approval Requirements and Information Document [EPA 815-R-11-003]","document_id":"EPA-HQ-OW-2009-0090-0140"},{"title":"Revisions to the Unregulated Contaminant Monitoring Regulation (UCMR 3) for Public Water System","document_id":"EPA-HQ-OW-2009-0090-0139"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2040-AF10/revisions-to-the-unregulated-contaminant-monitoring-regulation-ucmr-3-for-public-water-systems","title":"Revisions to the Unregulated Contaminant Monitoring Regulation (UCMR 3) for Public Water Systems"},"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OW-2009-0090","supporting_documents_count":88,"docket_id":"EPA-HQ-OW-2009-0090","regulation_id_number":"2040-AF10","title":"Revisions to the Unregulated Contaminant Monitoring Regulations (UCMR) for Public Water Systems","checked_regulationsdotgov_at":"2012-05-22T08:05:46Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":26072,"subtype":null,"title":"Revisions to the Unregulated Contaminant Monitoring Regulation (UCMR 3) for Public Water Systems","toc_doc":"Revisions to the Unregulated Contaminant Monitoring Regulation for Public Water Systems","toc_subject":null,"topics":["Administrative practice and procedure","Chemicals","Environmental protection","Incorporation by reference","Indians-lands","Intergovernmental relations","Radiation protection","Reporting and recordkeeping requirements","Water supply"],"type":"Rule","volume":77}