{"abstract":"On January 5, 2005, EPA promulgated air quality designations for all areas for the national ambient air quality standards (NAAQS) for fine particles (i.e. particles less than 2.5 microns in diameter, also known as PM2.5) (70 FR 944). We designated 47 areas composed of 224 counties and the District of Columbia as nonattainment. We designated 5 areas comprised of 7 counties as unclassifiable. We designated the remaining counties in the United States as attainment/ unclassifiable. We based the designations in the January 5, 2005, final rule on air quality monitoring data from the 3-year period of 2001 to 2003. In that action, we provided that these designations would be effective 90 days from the date of publication in the Federal Register, which is April 5, 2005. Because the designations occurred at the end of 2004, we indicated our desire to consider 2004 data where feasible in order to evaluate attainment status based upon data from the 3-year period of 2002 to 2004. We explained that we would consider any complete, quality-assured, and certified 2004 PM2.5 data submitted by any State to EPA by February 22, 2005, if such data indicated that a change in the designation for the entire area would be appropriate. In the January 5, 2005, action, we stated that if EPA agreed that a change in the designation was appropriate based upon the inclusion of 2004 data, then EPA would withdraw the initial designation for the area and issue a designation that reflected the consideration of the new data before the April 5, 2005, effective date. Today's action addresses areas for which States have submitted complete, quality-assured, and certified PM2.5 air quality data for 2004, and it modifies the designation status to attainment for eight areas we originally designated as nonattainment and for four areas we originally designated as unclassifiable. This action also includes technical corrections related to boundary descriptions for a few areas included in the January 5, 2005, action. The EPA has received a number of other petitions in connection with the PM2.5 designations pertaining to issues other than inclusion of 2004 data as a basis for changing the designation prior to the effective date. The EPA is not responding to those petitions in this document and will be evaluating and responding to those petitions separately.","action":"Final rule; supplemental amendments.","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/2005/04/14/05-7227.html","cfr_references":[{"chapter":null,"citation_url":null,"part":81,"title":40}],"citation":"70 FR 19844","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective upon April 5, 2005.","disposition_notes":null,"docket_ids":["OAR-2003-0061","FRL-7896-8"],"dockets":[],"document_number":"05-7227","effective_on":"2005-04-05","end_page":19856,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2005/04/14/05-7227.xml","html_url":"https://www.federalregister.gov/documents/2005/04/14/05-7227/air-quality-designations-for-the-fine-particles-pm25-national-ambient-air-quality","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/05-7227?publication_date=2005-04-14","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2005-04-14/05-7227/mods.xml","not_received_for_publication":null,"page_length":13,"page_views":{"count":276,"last_updated":"2026-05-31 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2005-04-14/pdf/05-7227.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2005-04-14","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2005/04/14/05-7227.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-11-12T15:52:55Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":19844,"subtype":null,"title":"Air Quality Designations for the Fine Particles (PM2.5) National Ambient Air Quality Standards-Supplemental Amendments","toc_doc":"Fine particles; supplemental amendments","toc_subject":"Air programs:","topics":["Air pollution control","Environmental protection","National parks","Wilderness areas"],"type":"Rule","volume":70}