{"abstract":"The U.S. Environmental Protection Agency (EPA or the Agency) is approving an application from the State of Colorado that requests primary enforcement responsibility (primacy) for Class VI injection wells under Safe Drinking Water Act (SDWA) section 1422. The EPA's approval of the State's UIC program primacy application will allow the Colorado Energy and Carbon Management Commission (ECMC) to issue and enforce UIC Class VI permits for geologic carbon sequestration. The EPA will remain the permitting authority for Class VI injection wells on Indian lands within the State. With this action, the EPA also intends to codify previously approved, non-substantial changes to Colorado's UIC program for Class II injection wells.","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/2026/10/13/2026-20846.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"147","title":40}],"citation":"91 FR 64780","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on November 12, 2026. The incorporation by reference of certain material listed in this rule is approved by the Director of the Federal Register as of October 13, 2026. For judicial purposes, this final rule is promulgated as of October 13, 2026.","disposition_notes":null,"docket_ids":["EPA-HQ-OW-2025-2829","FRL 12995-02-OW"],"dockets":[],"document_number":"2026-20846","effective_on":"2026-11-12","end_page":64787,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/10/13/2026-20846.xml","html_url":"https://www.federalregister.gov/documents/2026/10/13/2026-20846/colorado-underground-injection-control-uic-program-class-vi-primacy","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-20846?publication_date=2026-10-13","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-10-13/2026-20846/mods.xml","not_received_for_publication":null,"page_length":8,"page_views":{"count":72,"last_updated":"2026-10-11 18:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-10-13/pdf/2026-20846.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2026-10-13","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/10/13/2026-20846.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":64780,"subtype":null,"title":"Colorado Underground Injection Control (UIC) Program; Class VI Primacy","toc_doc":"Class VI Primacy","toc_subject":"Colorado Underground Injection Control Program","topics":["Environmental protection","Incorporation by reference","Indians-lands","Intergovernmental relations","Reporting and recordkeeping requirements","Water supply"],"type":"Rule","volume":91}