New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Northwest Clean Air Agency, Washington State 2026-21383 | Environmental Protection Agency | Proposed rule | Oct 19 |
Approval and Promulgation of Implementation Plans; Arizona; Revisions to the Cleaner Burning Gasoline, Winter Oxygenated Fuel, and Gasoline Set-Aside Programs 2026-21268 | Environmental Protection Agency | Final rule | Oct 19 |
Air Plan Approval; Michigan; Clean Data Determination for the Berrien, MI and Muskegon, MI Areas for the 2015 Ozone Standards 2026-20736 | Environmental Protection Agency | Final rule | Oct 9 |
Air Plan Approval; Kentucky; Louisville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS 2026-20641 | Environmental Protection Agency | Final rule | Oct 8 |
Approval and Promulgation of State Implementation Plans; New Jersey; RACT Certifications for the 2008 and 2015 Ozone National Ambient Air Quality Standards 2026-20638 | Environmental Protection Agency | Final rule | Oct 8 |
Air Plan Approval; GA; Removal of Nonattainment Area New Source Review 2026-20636 | Environmental Protection Agency | Final rule | Oct 8 |
Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors 2026-20635 | Environmental Protection Agency | Final rule | Oct 8 |
Air Plan Approval; Missouri; Construction Permit Exemptions 2026-20634 | Environmental Protection Agency | Final rule | Oct 8 |
Air Quality Plan; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits-Rule 204 2026-20612 | Environmental Protection Agency | Proposed rule | Oct 8 |
Approval of Implementation Plans for Air Quality Planning Purposes; State of Nevada; Truckee Meadows Second 10-Year Maintenance Plan for the 1987 PM-10 Standard 2026-20102 | Environmental Protection Agency | Proposed rule | Oct 1 |
Air Plan Approval; OR; Lane County Title 36 Rule 2026-20101 | Environmental Protection Agency | Proposed rule | Oct 1 |
Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2026-20097 | Environmental Protection Agency | Final rule | Oct 1 |
Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS 2026-19668 | Environmental Protection Agency | Final rule | Sep 25 |
Air Plan Approval; Alabama; Transportation Conformity 2026-19566 | Environmental Protection Agency | Final rule | Sep 24 |
Air Plan Approval; North Carolina; Charlotte-Rock Hill Area Maintenance Plan for the 2008 8-Hour Ozone NAAQS 2026-19495 | Environmental Protection Agency | Proposed rule | Sep 23 |
Clean Data Determination; 1997 8-Hour Ozone Standards; California; Sacramento Metro Area 2026-18755 | Environmental Protection Agency | Proposed rule | Sep 14 |
Approval and Promulgation of Implementation Plans; California; San Joaquin Valley, Revisions to Motor Vehicle Emissions Budgets for Ozone 2026-18748 | Environmental Protection Agency | Final rule | Sep 14 |
Air Plan Approval; Reconsideration and Repeal of Air Plan Partial Approval and Partial Disapproval of North Dakota's Regional Haze State Implementation Plan for the Second Implementation Period 2026-18290 | Environmental Protection Agency | Proposed rule | Sep 9 |
Air Plan Approval; Mississippi; 2010 1-Hour SO2 NAAQS Transport Infrastructure 2026-17503 | Environmental Protection Agency | Proposed rule | Aug 27 |
Air Plan Approval; Kentucky; Cincinnati-Hamilton Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS 2026-17502 | Environmental Protection Agency | Proposed rule | Aug 27 |
Air Plan Approval; Kentucky; Louisville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS 2026-17501 | Environmental Protection Agency | Proposed rule | Aug 27 |
Air Plan Approval; Arkansas; Regional Haze State Implementation Plan for the Second Implementation Period 2026-17494 | Environmental Protection Agency | Final rule | Aug 27 |
Air Plan Approval; Michigan; 2015 Ozone Moderate Reasonably Available Control Technology 2026-17486 | Environmental Protection Agency | Final rule | Aug 27 |
Air Plan Approval; SC; Department Name Change 2026-16990 | Environmental Protection Agency | Final rule | Aug 20 |
Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas 2026-16986 | Environmental Protection Agency | Final rule | Aug 20 |
Air Plan Approval; South Carolina; Minor Source Permit Program Revisions 2026-16937 | Environmental Protection Agency | Proposed rule | Aug 19 |
Air Plan Approval; South Carolina; Minor Source Permit Program Revisions 2026-16930 | Environmental Protection Agency | Proposed rule | Aug 19 |
Approval of Source-Specific Air Quality Implementation Plan; New York; Big Six Towers Inc. 2026-16627 | Environmental Protection Agency | Final rule | Aug 14 |
Air Plan Approval; Virginia; 1997 8-Hour Ozone National Ambient Air Quality Standard Second Maintenance Plan for the Madison and Page Counties (Shenandoah National Park) Area 2026-16575 | Environmental Protection Agency | Proposed rule | Aug 14 |
Air Plan Approval; Missouri; Moderate Attainment Plan Elements for the 2015 8-Hour Ozone Standard for the Missouri Portion of the St. Louis Nonattainment Area 2026-16571 | Environmental Protection Agency | Proposed rule | Aug 14 |
Air Plan Approval; Iowa; Interstate Transport Requirements for the 2010 Sulfur Dioxide Standard 2026-16570 | Environmental Protection Agency | Proposed rule | Aug 14 |
Air Plan Approval; Commonwealth of Virginia; Transfer of Authority and Requests for Certain Public Hearings on Air Permits 2026-16564 | Environmental Protection Agency | Proposed rule | Aug 13 |
Air Plan Approval; Missouri; Clean Data Determination for the 2015 8-Hour Ozone Standard for the Missouri Portion of the St. Louis Nonattainment Area 2026-16515 | Environmental Protection Agency | Final rule | Aug 13 |
Air Plan Approval; Illinois; Clean Data Determination for the Illinois Portion of the St. Louis Area for the 2015 Ozone Standard 2026-16514 | Environmental Protection Agency | Final rule | Aug 13 |
Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley 2026-16511 | Environmental Protection Agency | Final rule | Aug 13 |
Air Quality Plan; Arizona; Maricopa County Air Quality Department; Gasoline Loading 2026-16335 | Environmental Protection Agency | Proposed rule | Aug 11 |
Air Plan Approval; New Hampshire; Repeal of Motor Vehicle Inspection and Maintenance Program 2026-16330 | Environmental Protection Agency | Proposed rule | Aug 11 |
Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; Arizona; Prevention of Significant Deterioration Infrastructure Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard 2026-16083 | Environmental Protection Agency | Proposed rule | Aug 6 |
Air Plan Approval; Illinois; 2015 Ozone Moderate and Serious Reasonably Available Control Technology Update 2026-16001 | Environmental Protection Agency | Proposed rule | Aug 6 |
Air Plan Approval; Connecticut; Plan for Inclusion of a Consent Order No. 8383-Algonquin Gas Transmission, LLC and Negative Declaration for Rubber Tire Manufacturing Sources 2026-15986 | Environmental Protection Agency | Final rule | Aug 6 |
Air Plan Approval; Rhode Island; Update to Materials Incorporated by Reference 2026-15493 | Environmental Protection Agency | Final rule | Jul 31 |
Air Plan Approval; California; San Joaquin Valley Air Pollution Control District 2026-15377 | Environmental Protection Agency | Final rule | Jul 30 |
Air Plan Approval; Pennsylvania; Redesignation of the Warren County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2026-15372 | Environmental Protection Agency | Proposed rule | Jul 30 |
Air Plan Approval; Missouri; Construction Permit Exemptions 2026-15371 | Environmental Protection Agency | Proposed rule | Jul 30 |
Clean Air Act Operating Permit Program Revisions; California; Amador County Air Pollution Control District, Calaveras County Air Pollution Control District, Great Basin Unified Air Pollution Control District, Northern Sierra Air Quality Management District 2026-15362 | Environmental Protection Agency | Proposed rule | Jul 30 |
Air Plan Approval; Michigan; Redesignation of the Detroit, MI Area to Attainment of the 2015 Ozone Standards 2026-15168 | Environmental Protection Agency | Proposed rule | Jul 28 |
Air Plan Approval; Michigan; Redesignation of the Berrien, MI and Muskegon, MI Areas to Attainment of the 2015 Ozone Standards 2026-15167 | Environmental Protection Agency | Proposed rule | Jul 28 |
Approval and Promulgation of State Implementation Plans; New Jersey; RACT Certifications for the 2008 and 2015 Ozone National Ambient Air Quality Standards 2026-14923 | Environmental Protection Agency | Proposed rule | Jul 23 |
Air Plan Approval; Pennsylvania; Revision to Source-Specific Reasonably Available Control Technology (RACT) Requirements 2026-14891 | Environmental Protection Agency | Proposed rule | Jul 23 |
Air Plan Approval; Maine; Chapter 140: Part 70 Air Emission License Regulation 2026-14885 | Environmental Protection Agency | Final rule | Jul 23 |
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer 2026-14880 | Environmental Protection Agency | Final rule | Jul 23 |
Air Plan Approval; Pennsylvania; Interim Final Determination To Stay and Defer Sanctions Related to Reasonably Available Control Technology Requirements (RACT) for Volatile Organic Compounds (VOC) Control Technique Guidelines (CTG) Under the 2008 Ozone National Ambient Air Quality Standards (NAAQS) 2026-14326 | Environmental Protection Agency | Final rule | Jul 16 |
Air Plan Approval; Pennsylvania; Reasonably Available Control Technology (RACT) for Volatile Organic Compounds (VOC) Control Technique Guidelines (CTG) Under the 2008 and 2015 Ozone National Ambient Air Quality Standards (NAAQS) 2026-14325 | Environmental Protection Agency | Proposed rule | Jul 16 |
Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations 2026-14322 | Environmental Protection Agency | Final rule | Jul 16 |
Air Plan Revisions; California; Antelope Valley Air Quality Management District; New Source Review; Stationary Source Permits 2026-14317 | Environmental Protection Agency | Final rule | Jul 16 |
Approval and Promulgation of Implementation Plans; California; San Joaquin Valley; Revisions to Motor Vehicle Emissions Budgets for Ozone 2026-13845 | Environmental Protection Agency | Proposed rule | Jul 9 |
Air Plan Approval; Alabama; Transportation Conformity 2026-13403 | Environmental Protection Agency | Proposed rule | Jul 2 |
Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP Provisions 2026-13398 | Environmental Protection Agency | Final rule | Jul 2 |
Air Plan Approval; Ohio; Redesignation of the Cleveland, OH Area to Attainment of the 2015 Ozone Standard 2026-13027 | Environmental Protection Agency | Final rule | Jun 29 |
Air Quality Plan; California; Mojave Desert Air Quality Management District; Rescissions of Outdated Requirements Within Riverside County 2026-12935 | Environmental Protection Agency | Proposed rule | Jun 26 |
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT and SIP Strengthening for Ohio 2026-12921 | Environmental Protection Agency | Final rule | Jun 26 |
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT 2026-12920 | Environmental Protection Agency | Final rule | Jun 26 |
Air Plan Approval; District of Columbia; Creation of Synthetic Minor Permit Program 2026-12898 | Environmental Protection Agency | Final rule | Jun 26 |
Approval and Promulgation of Implementation Plans; Arizona; Revisions to the Cleaner Burning Gasoline, Winter Oxygenated Fuel, and Gasoline Set-Aside Programs 2026-12551 | Environmental Protection Agency | Proposed rule | Jun 23 |
Air Plan Approval; Colorado; RACT Requirements for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area 2026-12543 | Environmental Protection Agency | Proposed rule | Jun 23 |
Air Plan Approval; OR; Update to Materials Incorporated by Reference 2026-12415 | Environmental Protection Agency | Final rule | Jun 22 |
Ozone Reclassification State Implementation Plan Rule 2026-11843 | Environmental Protection Agency | Proposed rule | Jun 12 |
Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2026-11736 | Environmental Protection Agency | Proposed rule | Jun 11 |
Attainment Date Extension for the San Joaquin Valley, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2026-11735 | Environmental Protection Agency | Proposed rule | Jun 11 |
Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction 2026-11731 | Environmental Protection Agency | Final rule | Jun 11 |
Air Plan Approval; Connecticut; Ozone Ambient Air Quality Standard and Adhesive and Sealants Regulation Revisions 2026-11728 | Environmental Protection Agency | Final rule | Jun 11 |
Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Regional Haze Federal Implementation Plan 2026-11436 | Environmental Protection Agency | Proposed rule | Jun 8 |
Clean Air Act Title V Operating Permit Program Revision; District of Columbia 2026-11170 | Environmental Protection Agency | Final rule | Jun 4 |
Revisions of the Nonattainment Designation for the 2008 and 2015 Ozone Standards and Clean Data Determinations for the 2008 and 2015 Ozone Standards: Cecil County, MD and New Castle County, DE 2026-11169 | Environmental Protection Agency | Final rule | Jun 4 |
Conditional Approval; Contingency Measure State Implementation Plan for the 2008 Ozone Standards; San Joaquin Valley, California 2026-11168 | Environmental Protection Agency | Final rule | Jun 4 |
Air Plan Approval; Indiana; Keystone VOC RACT Alternative Control 2026-10776 | Environmental Protection Agency | Final rule | May 29 |
Air Plan Approval; Pennsylvania; Revision to Philadelphia Gas Works, Richmond Plant Reasonably Available Control Technology Plan Under the 1997 8-Hour Ozone National Ambient Air Quality Standards 2026-10771 | Environmental Protection Agency | Final rule | May 29 |
Air Plan Approval; Michigan; Determination of Attainment by the Attainment Date for the 2015 Ozone Standards 2026-10767 | Environmental Protection Agency | Proposed rule | May 29 |
Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District; Ventura County Air Pollution Control District; South Coast Air Quality Management District; Oil and Gas Production; Volatile Organic Compounds 2026-10760 | Environmental Protection Agency | Final rule | May 29 |
Air Plan Approval; Maryland; Clean Data Determination for the Baltimore, MD Nonattainment Area for the 2015 Ozone National Ambient Air Quality Standards 2026-10755 | Environmental Protection Agency | Final rule | May 29 |
Air Plan Approval; Virginia; Repeal of Existing Stationary Source Regulations 2026-10745 | Environmental Protection Agency | Final rule | May 29 |
South Carolina; Approval of State Plan for Control of Emissions From Commercial and Industrial Solid Waste Incineration Units 2026-10744 | Environmental Protection Agency | Final rule | May 29 |
Air Plan Approval; ID; Update to Materials Incorporated by Reference 2026-10738 | Environmental Protection Agency | Final rule | May 29 |
Air Plan Approval; Ohio; Removal of Air Nuisance Rule 2026-10643 | Environmental Protection Agency | Proposed rule | May 28 |
Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors; Extension of Comment Period 2026-10638 | Environmental Protection Agency | Proposed rule | May 28 |
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Gila County Reasonably Available Control Technology 2026-10280 | Environmental Protection Agency | Final rule | May 22 |
Air Plan Approval; Montana; Revisions to Western Sugar Stipulation 2026-09619 | Environmental Protection Agency | Final rule | May 14 |
Air Plan Approval; Minnesota; Metropolitan Council Wastewater Treatment Plant Title I PM10 SIP Revisions 2026-09618 | Environmental Protection Agency | Final rule | May 14 |
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements 2026-09616 | Environmental Protection Agency | Final rule | May 14 |
Air Plan Approval; Ohio; Clean Data Determination for the Cleveland, Ohio Area for the 2015 Ozone Standard 2026-09614 | Environmental Protection Agency | Final rule | May 14 |
Air Plan Approval; Illinois; Moderate Attainment Plan Elements for the Chicago and Metro East Areas for the 2015 Ozone Standard 2026-09613 | Environmental Protection Agency | Final rule | May 14 |
Air Plan Approval; NC; Removal of the State's Vehicle Inspection and Maintenance Program 2026-09146 | Environmental Protection Agency | Proposed rule | May 8 |
Utah; Northern Wasatch Front; 2015 8-Hour Ozone National Ambient Air Quality Standards; Reconsideration and Repeal of Finding of Failure To Attain and Reclassification to a Serious Nonattainment Area; Determination of Attainment by the Moderate Attainment Date But for International Emissions 2026-08372 | Environmental Protection Agency | Proposed rule | Apr 30 |
Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors 2026-08364 | Environmental Protection Agency | Proposed rule | Apr 29 |
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer 2026-07906 | Environmental Protection Agency | Proposed rule | Apr 23 |
Utah; Uinta Basin; 2015 8-Hour Ozone National Ambient Air Quality Standard; Reconsideration and Repeal of Finding of Failure To Attain and Reclassification to a Moderate Nonattainment Area; Extension of the Attainment Date and Determination of Attainment by the Marginal Attainment Date 2026-07904 | Environmental Protection Agency | Proposed rule | Apr 23 |
Kentucky; Approval and Promulgation of State Plan for Designated Facilities and Pollutants; Control of Emissions From Existing Municipal Solid Waste Landfills 2026-07894 | Environmental Protection Agency | Proposed rule | Apr 23 |
Finding of Failure To Attain and Reclassification of Tribal Portions of the Greater Connecticut Ozone Nonattainment Area as Serious for the 2015 Ozone National Ambient Air Quality Standards 2026-07889 | Environmental Protection Agency | Final rule | Apr 23 |
Air Plan Approval; Virginia; Revision to the Regulatory Definition of Volatile Organic Compound 2026-07885 | Environmental Protection Agency | Final rule | Apr 23 |
Air Plan Approval; Missouri; Construction Permits Required 2026-07884 | Environmental Protection Agency | Final rule | Apr 23 |
National Emission Standards for Hazardous Air Pollutants: Crude Oil and Natural Gas Production Facilities and Natural Gas Transmission and Storage Facilities; Technology Review and Reconsideration 2026-07800 | Environmental Protection Agency | Proposed rule | Apr 22 |
Air Plan Approval; Virginia; Amendment to the State Operating Permit for GP Big Island, LLC 2026-07527 | Environmental Protection Agency | Final rule | Apr 17 |
Air Plan Revisions; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits 2026-07405 | Environmental Protection Agency | Proposed rule | Apr 16 |
Air Plan Approval; Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standards 2026-07400 | Environmental Protection Agency | Final rule | Apr 16 |
Air Plan Approval; Pennsylvania; Redesignation Request for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard 2026-07399 | Environmental Protection Agency | Final rule | Apr 16 |
Air Plan Approval; Ohio; Redesignation of the Cleveland, OH Area to Attainment of the 2015 Ozone Standards 2026-06943 | Environmental Protection Agency | Proposed rule | Apr 10 |
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT for Ohio 2026-06940 | Environmental Protection Agency | Proposed rule | Apr 10 |
Air Plan Approval; Rhode Island; Regional Haze State Implementation Plan for the Second Implementation Period; Prong 4 (Visibility) for the 2015 8-Hour Ozone National Ambient Air Quality Standard 2026-06838 | Environmental Protection Agency | Final rule | Apr 9 |
Air Plan Approval; Colorado; Serious Attainment Plan Contingency Measures and RACT Requirements for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area 2026-06837 | Environmental Protection Agency | Final rule | Apr 9 |
Air Plan Approval; Missouri; Revisions to Existing Rule 10 CSR 10-5.570; Control of Sulfur Emissions From Stationary Boilers 2026-06832 | Environmental Protection Agency | Final rule | Apr 9 |
Air Plan Approval; Missouri; Revisions to Existing Rule 10 CSR 10-5.570; Control of Sulfur Emissions From Stationary Boilers 2026-06831 | Environmental Protection Agency | Proposed rule | Apr 9 |
Clean Air Act Operating Permit Program Revision; California; Monterey Bay Air Resources District 2026-06443 | Environmental Protection Agency | Proposed rule | Apr 2 |
Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas 2026-06442 | Environmental Protection Agency | Proposed rule | Apr 2 |
Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction 2026-06441 | Environmental Protection Agency | Proposed rule | Apr 2 |
Air Plan Approval; Ohio; Ohio Permit Rules Revisions 2026-06398 | Environmental Protection Agency | Final rule | Apr 2 |
Air Plan Approval; Oregon; 2024 Vehicle Inspection Program Updates 2026-06388 | Environmental Protection Agency | Final rule | Apr 2 |
Air Quality Plan; California; Mojave Desert Air Quality Management District; Replacing Outdated Requirements; Correction 2026-06386 | Environmental Protection Agency | Final rule | Apr 2 |
Air Plan Approval; Connecticut; New Source Review Permit Program State Plan Revision 2026-06384 | Environmental Protection Agency | Final rule | Apr 2 |
Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations 2026-05875 | Environmental Protection Agency | Proposed rule | Mar 26 |
Approval and Promulgation of State Plans for Designated Facilities and Pollutants; West Virginia; Control of Emissions From Existing Municipal Solid Waste Landfills 2026-05637 | Environmental Protection Agency | Proposed rule | Mar 23 |
Air Plan Revisions; California; Antelope Valley Air Quality Management District; New Source Review; Stationary Source Permits 2026-05636 | Environmental Protection Agency | Proposed rule | Mar 23 |
Air Plan Approval; Texas; Reasonably Available Control Technology in the Dallas-Fort Worth Ozone Nonattainment Area 2026-05607 | Environmental Protection Agency | Final rule | Mar 23 |
Determination of Attainment by the Attainment Date But for International Emissions for the 2015 Ozone National Ambient Air Quality Standards; Phoenix-Mesa Nonattainment Area, Arizona 2026-05601 | Environmental Protection Agency | Final rule | Mar 23 |
Air Plan Approval; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area 2026-05596 | Environmental Protection Agency | Final rule | Mar 23 |
Approval of Clean Air Plans; San Joaquin Valley, California; Contingency Measures for 1997 Ozone Standards 2026-05592 | Environmental Protection Agency | Final rule | Mar 23 |
Air Plan Revisions; California; Mojave Desert Air Quality Management District; New Source Review; Stationary Source Permits 2026-05591 | Environmental Protection Agency | Final rule | Mar 23 |
Air Plan Approval; Ohio; Volatile Organic Compounds RFD Beaufort 2026-05568 | Environmental Protection Agency | Final rule | Mar 23 |
Air Plan Approval; New Hampshire; Single Source VOC RACT Order for Hutchinson Sealing Systems 2026-05567 | Environmental Protection Agency | Final rule | Mar 23 |
Air Plan Approval; Connecticut; Revision to the State Implementation Plan for Inclusion of Consent Order No. 8383-Algonquin Gas Transmission, LLC and Negative Declaration for Rubber Tire Manufacturing Sources 2026-04991 | Environmental Protection Agency | Proposed rule | Mar 13 |
Air Plan Approval; Michigan; Clean Data Determination for the Berrien, MI and Muskegon, MI Areas for the 2015 Ozone Standards 2026-04851 | Environmental Protection Agency | Proposed rule | Mar 12 |
Air Plan Approval; North Dakota; Approval of Air Quality Implementation Plans; Regional Haze State Implementation Plan; Regional Haze Five Year Progress Report and Nitrogen Oxides Best Available Retrofit Technology Determination for Coal Creek Station for the First Implementation Period 2026-04649 | Environmental Protection Agency | Final rule | Mar 10 |
Air Plan Approval; OR; Klamath Falls PM2.5 Redesignation to Attainment and Maintenance Plan 2026-04333 | Environmental Protection Agency | Proposed rule | Mar 4 |
Air Plan Approval; AK; Regional Haze State Implementation Plan for the Second Implementation Period 2026-04159 | Environmental Protection Agency | Final rule | Mar 3 |
Air Plan Approval; Michigan; 2015 Ozone Moderate Reasonably Available Control Technology 2026-03937 | Environmental Protection Agency | Proposed rule | Feb 27 |
Air Plan Approval; Ohio; Clean Data Determination for the Cleveland, Ohio Area for the 2015 Ozone Standard 2026-03934 | Environmental Protection Agency | Proposed rule | Feb 27 |
Air Plan Approval; Indiana; Keystone VOC RACT Alternative Control 2026-03933 | Environmental Protection Agency | Proposed rule | Feb 27 |
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT and SIP Strengthening for Ohio 2026-03931 | Environmental Protection Agency | Proposed rule | Feb 27 |
Air Plan Approval; Missouri; Reporting Emission Data, Emission Fees, and Process Information 2026-03888 | Environmental Protection Agency | Final rule | Feb 26 |
Air Plan Approval; Connecticut; State Implementation Plan Revisions Required as a Result of a Definition Change Due to the Ozone Reclassification 2026-03887 | Environmental Protection Agency | Final rule | Feb 26 |
Air Plan Approval; Michigan; Moderate Attainment Plan Elements for the Allegan County, Berrien County, and Muskegon County Areas for the 2015 Ozone Standard 2026-03880 | Environmental Protection Agency | Final rule | Feb 26 |
Air Plan Approval; Illinois; Clean Data Determination for the Illinois Portion of the St. Louis Area for the 2015 Ozone Standard 2026-03846 | Environmental Protection Agency | Proposed rule | Feb 26 |
Air Plan Approval; Missouri; Clean Data Determination for the 2015 8-Hour Ozone Standard for the Missouri Portion of the St. Louis Nonattainment Area 2026-03845 | Environmental Protection Agency | Proposed rule | Feb 26 |
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Gila County Reasonably Available Control Technology 2026-02845 | Environmental Protection Agency | Proposed rule | Feb 12 |
Air Plan Approval; Illinois; Moderate Attainment Plan Elements for the Chicago and Metro East Areas for the 2015 Ozone Standard 2026-02842 | Environmental Protection Agency | Proposed rule | Feb 12 |
Air Plan Approval; Ohio; Second Maintenance Plan for 2008 Ozone NAAQS 2026-02822 | Environmental Protection Agency | Final rule | Feb 12 |
Air Plan Approval; New York; New York Metropolitan Area Second Ten-Year Limited Maintenance Plan for the 2006 24-Hour PM2.5 Standard 2026-02810 | Environmental Protection Agency | Proposed rule | Feb 12 |
Air Plan Approval; AK; Updates to Materials Incorporated by Reference 2026-02478 | Environmental Protection Agency | Final rule | Feb 9 |
Air Plan Approval; Connecticut; Revised Format for Materials Incorporated by Reference 2026-02477 | Environmental Protection Agency | Final rule | Feb 9 |
Air Plan Approval; Pennsylvania; Proposed Revision to Philadelphia Gas Works, Richmond Plant Reasonably Available Control Technology Plan Under the 1997 8-Hour Ozone National Ambient Air Quality Standards 2026-02381 | Environmental Protection Agency | Proposed rule | Feb 6 |
Determination of Attainment by the Attainment Date and Clean Data Determination; California, San Joaquin Valley 1997 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2026-01766 | Environmental Protection Agency | Final rule | Jan 29 |
Air Plan Approval; Pennsylvania; Motor Vehicle Inspection and Maintenance Program Certification for Moderate Nonattainment Under the 2015 Ozone National Ambient Air Quality Standards 2026-01762 | Environmental Protection Agency | Final rule | Jan 29 |
Air Plan Approval; OR; Lane County Permitting Rule Revisions 2026-01735 | Environmental Protection Agency | Final rule | Jan 29 |
Determination of Attainment by the Attainment Date for the Louisville Moderate Area for the 2015 Ozone National Ambient Air Quality Standard 2026-01733 | Environmental Protection Agency | Proposed rule | Jan 29 |
Air Plan Disapproval; Colorado; Regional Haze Plan for the Second Implementation Period 2026-01413 | Environmental Protection Agency | Final rule | Jan 26 |
Air Plan Approval; Arkansas; Codification of the State Implementation Plan 2026-01410 | Environmental Protection Agency | Final rule | Jan 26 |
Air Plan Approval; Montana; Revisions to Western Sugar Stipulation 2026-01324 | Environmental Protection Agency | Proposed rule | Jan 23 |
Proposed Revisions of the Nonattainment Designation for the 2008 and 2015 Ozone Standards and Clean Data Determinations for the 2008 and 2015 Ozone Standards: Cecil County, MD and New Castle County, DE; Extension of Comment Period 2026-01319 | Environmental Protection Agency | Proposed rule | Jan 23 |
Air Plan Approval; Maryland; Clean Data Determination for the Baltimore, MD Nonattainment Area for the 2015 Ozone National Ambient Air Quality Standards 2026-01314 | Environmental Protection Agency | Proposed rule | Jan 23 |
Air Plan Approval; Ohio; 2015 Ozone Moderate Reasonably Available Control Technology 2026-01001 | Environmental Protection Agency | Final rule | Jan 20 |
Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley 2026-00782 | Environmental Protection Agency | Proposed rule | Jan 15 |
Air Plan Approval; New York; Ortho Clinical Diagnostics 2026-00281 | Environmental Protection Agency | Final rule | Jan 9 |
Air Plan Approval; Ohio; Ohio Permit Rules Revisions 2026-00258 | Environmental Protection Agency | Proposed rule | Jan 9 |
Air Plan Approval; New Hampshire; Updates to Materials Incorporated by Reference 2026-00249 | Environmental Protection Agency | Final rule | Jan 9 |
Clean Air Act Title V Operating Permit Program Revision; District of Columbia 2026-00215 | Environmental Protection Agency | Proposed rule | Jan 8 |
Air Plan Approval; Missouri; Construction Permits Required 2026-00214 | Environmental Protection Agency | Proposed rule | Jan 8 |
Air Plan Approval; California; Mojave Desert Air Quality Management District; Replacing Outdated Requirements 2026-00208 | Environmental Protection Agency | Final rule | Jan 8 |
Air Plan Approval; California; Mojave Desert Air Quality Management District; Definition of Terms 2026-00194 | Environmental Protection Agency | Final rule | Jan 8 |
Utah; Northern Wasatch Front; 2015 8-Hour Ozone Nonattainment Area Boundary Expansion and Applicability of Certain Clean Air Act Requirements 2026-00007 | Environmental Protection Agency | Final rule | Jan 6 |
Air Plan Revision; California; Placer County Air Pollution Control District; New Source Review 2026-00006 | Environmental Protection Agency | Final rule | Jan 6 |
Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District 2026-00005 | Environmental Protection Agency | Final rule | Jan 6 |
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements; Withdrawal of Direct Final Rule 2026-00004 | Environmental Protection Agency | Final rule | Jan 6 |
Extension of the State Implementation Plan Due Date for the Regional Haze Third Implementation Period 2026-00003 | Environmental Protection Agency | Final rule | Jan 6 |
Proposed Revisions of the Nonattainment Designation for the 2008 and 2015 Ozone Standards and Clean Data Determinations for the 2008 and 2015 Ozone Standards: Cecil County, MD and New Castle County, DE 2025-24200 | Environmental Protection Agency | Proposed rule | Jan 2 |
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma 2025-24149 | Environmental Protection Agency | Final rule | Jan 2 |
Air Plan Approval; Colorado; Revisions to Colorado Procedural Rules and Common Provisions Regulation 2025-24141 | Environmental Protection Agency | Final rule | Jan 2 |
New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana 2025-23284 | Environmental Protection Agency | Final rule | Dec 18, 2025 |
Air Plan Approval: Arizona: Infrastructure Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard 2025-23259 | Environmental Protection Agency | Final rule | Dec 18, 2025 |
Air Plan Approval; New Hampshire; Single Source VOC RACT Order for Hutchinson Sealing Systems 2025-22610 | Environmental Protection Agency | Proposed rule | Dec 11, 2025 |
Air Plan Approval; Michigan; Moderate Attainment Plan Elements for the Allegan County, Berrien County, and Muskegon County Areas for the 2015 Ozone Standard 2025-22607 | Environmental Protection Agency | Proposed rule | Dec 11, 2025 |
Air Plan Approval; Connecticut; Plan Submittals for the 2008 Ozone National Ambient Air Quality Standard 2025-22595 | Environmental Protection Agency | Final rule | Dec 11, 2025 |
Air Plan Disapproval; Ohio; E-Check Attestation Provisions 2025-22594 | Environmental Protection Agency | Proposed rule | Dec 11, 2025 |
Air Plan Approval; California; South Coast Air Quality Management District 2025-22584 | Environmental Protection Agency | Final rule | Dec 11, 2025 |
Air Plan Approval; South Carolina; Second Planning Period Regional Haze Plan 2025-22565 | National Oceanic and Atmospheric Administration | Final rule | Dec 11, 2025 |
Air Plan Approval; California; San Joaquin Valley Air Pollution Control District 2025-22530 | Environmental Protection Agency | Proposed rule | Dec 11, 2025 |
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds and Particulate Matter; Solvent Cleaning; Architectural Coatings; Incinerators, Burn-Off Ovens, and Crematories 2025-22517 | Environmental Protection Agency | Final rule | Dec 11, 2025 |
Air Plan Approval; Texas and Oklahoma; Texas Regional Haze Plans for the First and Second Implementation Periods and Five-Year Progress Report; Oklahoma Regional Haze Plan for the First Implementation Period 2025-22002 | Environmental Protection Agency | Final rule | Dec 5, 2025 |
Air Plan Approval; Virginia; Repeal of Existing Stationary Source Regulations 2025-21557 | Environmental Protection Agency | Proposed rule | Nov 28, 2025 |
Air Plan Approval; Connecticut; New Source Review Permit Program State Plan Revision 2025-21413 | Environmental Protection Agency | Proposed rule | Nov 28, 2025 |
Air Plan Approval; Missouri; Reporting Emission Data, Emission Fees, and Process Information 2025-21346 | Environmental Protection Agency | Proposed rule | Nov 28, 2025 |
Air Plan Approval; Montana; Regional Haze Plan for the Second Implementation Period 2025-21340 | Environmental Protection Agency | Final rule | Nov 28, 2025 |
Air Plan Approval; Ohio; Emergency Episodes and Ambient Air Quality Standards 2025-21322 | Environmental Protection Agency | Final rule | Nov 26, 2025 |
Air Plan Approval; Indiana; Second Maintenance Plan for 2008 Ozone NAAQS 2025-20672 | Environmental Protection Agency | Proposed rule | Nov 21, 2025 |
Air Plan Approval; Maine; Chapter 140: Part 70 Air Emission License Regulation 2025-20498 | Environmental Protection Agency | Proposed rule | Nov 20, 2025 |
Finding of Failure To Attain and Reclassification of Tribal Portions of the Greater Connecticut Ozone Nonattainment Area as Serious for the 2015 Ozone National Ambient Air Quality Standards 2025-20497 | Environmental Protection Agency | Proposed rule | Nov 20, 2025 |
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements 2025-20495 | Environmental Protection Agency | Final rule | Nov 20, 2025 |
Air Plan Approval; Minnesota; Exempt Source SIP Revision 2025-20492 | Environmental Protection Agency | Final rule | Nov 20, 2025 |
Air Plan Approval; Connecticut; Ozone Ambient Air Quality Standard and Adhesive and Sealants Regulation Revisions 2025-20463 | Environmental Protection Agency | Proposed rule | Nov 20, 2025 |
Air Plan Approval; Rhode Island; Decommissioning of Stage II Vapor Recovery Systems 2025-20458 | Environmental Protection Agency | Final rule | Nov 20, 2025 |
Air Plan Approval; South Carolina; Charlotte-Gastonia-Rock Hill Area Maintenance Plan for the 2008 8-Hour Ozone NAAQS 2025-20449 | Environmental Protection Agency | Final rule | Nov 20, 2025 |
Air Plan Approval; Minnesota; Metropolitan Council Wastewater Treatment Plant Title I PM10 SIP Revisions 2025-20441 | Environmental Protection Agency | Proposed rule | Nov 20, 2025 |
Air Plan Approval; District of Columbia; Creation of Synthetic Minor Permit Program 2025-20416 | Environmental Protection Agency | Proposed rule | Nov 20, 2025 |
Air Plan Approval; Pennsylvania; Redesignation Request for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard 2025-20409 | Environmental Protection Agency | Proposed rule | Nov 20, 2025 |
Determination of Attainment by the Attainment Date but for International Emissions for the 2015 Ozone National Ambient Air Quality Standards; Phoenix-Mesa Nonattainment Area, Arizona 2025-20357 | Environmental Protection Agency | Proposed rule | Nov 19, 2025 |
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Petroleum Solvent Dry Cleaning 2025-20354 | Environmental Protection Agency | Final rule | Nov 19, 2025 |
Approval and Promulgation of Implementation Plans; State of Utah; Salt Lake City and Provo, Utah PM2.5 Redesignations to Attainment and Utah State Implementation Plan Revisions 2025-20352 | Environmental Protection Agency | Final rule | Nov 19, 2025 |
Air Plan Approval; Colorado; Inspection and Maintenance Program Revision 2025-20205 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Montana: Infrastructure Requirements for the 2015 Ozone National Ambient Air Quality Standards 2025-20203 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Michigan; Revisions to Part 1 and 2 Rules 2025-20150 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Rhode Island; Amendments to Motor Vehicle Inspection and Maintenance Program 2025-20143 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Connecticut; 2014 and 2017 Periodic Emissions Inventory for 2008 8-Hour Ozone NAAQS 2025-20142 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Vermont; Regional Haze State Implementation Plan for the Second Implementation Period 2025-20141 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; AK, Fairbanks North Star Borough; 2006 24-Hour PM2.5 Serious Area and 189(d) Plan 2025-20097 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Pennsylvania; Redesignation of the Beaver County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2025-20096 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Arizona; Yuma 2015 8-Hour Ozone Nonattainment Area; Redesignation Request and Maintenance Plan 2025-20095 | Environmental Protection Agency | Final rule | Nov 18, 2025 |
Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP Provisions 2025-19989 | Environmental Protection Agency | Proposed rule | Nov 17, 2025 |
Approval of Clean Air Plans; San Joaquin Valley, California; Contingency Measures for 1997 Ozone Standards 2025-19884 | Environmental Protection Agency | Proposed rule | Nov 14, 2025 |
Air Plan Approval; Utah; Interstate Transport of Air Pollution for the 2008 8-Hour Ozone National Ambient Air Quality Standard 2025-19824 | Environmental Protection Agency | Final rule | Nov 10, 2025 |
Determination of Attainment by the Attainment Date; California; Mariposa County; 2015 8-Hour Ozone National Ambient Air Quality Standards 2025-19714 | Environmental Protection Agency | Final rule | Oct 30, 2025 |
Air Plan Approval; AK; Regional Haze Plan for the Second Implementation Period 2025-19713 | Environmental Protection Agency | Proposed rule | Oct 30, 2025 |
Air Plan Approval; Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard 2025-19638 | Environmental Protection Agency | Proposed rule | Oct 23, 2025 |
Visibility Protection: Regional Haze State Plan Requirements Rule Revision 2025-19280 · significant | Environmental Protection Agency | Proposed rule | Oct 2, 2025 |
Air Plan Approval; GA; Removal of Emissions Statements Requirement and Updates To Permit by Rule 2025-19228 | Environmental Protection Agency | Final rule | Oct 2, 2025 |
Air Plan Approval; Alabama; Standards for Granting Permits and Major New Source Review Permit Rules 2025-19227 | Environmental Protection Agency | Final rule | Oct 2, 2025 |
Air Plan Approval; North Carolina; Revisions to Regulations for Sulfur Dioxide Emissions From Combustion Sources 2025-19225 | Environmental Protection Agency | Final rule | Oct 2, 2025 |
Air Plan Approval; Ohio; Volatile Organic Compounds RFD Beaufort 2025-18652 | Environmental Protection Agency | Proposed rule | Sep 25, 2025 |
Air Plan Approval; California; San Joaquin Valley 1-Hour Ozone Area; Maintenance Plan and Redesignation Request 2025-18637 | Environmental Protection Agency | Final rule | Sep 25, 2025 |
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; San Joaquin Valley 2025-18636 | Environmental Protection Agency | Final rule | Sep 25, 2025 |
Air Plan Approval; Virginia; Revision to the Regulatory Definition of Volatile Organic Compound 2025-18635 | Environmental Protection Agency | Proposed rule | Sep 25, 2025 |
Air Plan Approval; Oregon; 2024 Vehicle Inspection Program Updates 2025-18629 | Environmental Protection Agency | Proposed rule | Sep 25, 2025 |
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program Certification 2025-18626 | Environmental Protection Agency | Final rule | Sep 25, 2025 |
Air Plan Approval; West Virginia; 2024 Amendments to West Virginia's Ambient Air Quality Standards 2025-18611 | Environmental Protection Agency | Final rule | Sep 25, 2025 |
Air Plan Approval; Washington; Regional Haze State Implementation Plan for the Second Implementation Period 2025-18599 | Environmental Protection Agency | Final rule | Sep 25, 2025 |
Utah; Northern Wasatch Front; 2015 8-Hour Ozone Nonattainment Area Boundary Expansion and Applicability of Certain Clean Air Act Requirements 2025-18569 | Environmental Protection Agency | Proposed rule | Sep 25, 2025 |
Air Plan Approval; Missouri; Definitions and Common Reference Tables 2025-18568 | Environmental Protection Agency | Final rule | Sep 25, 2025 |
Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District 2025-17638 | Environmental Protection Agency | Proposed rule | Sep 12, 2025 |
Air Plan Approval; California; Mojave Desert Air Quality Management District; Replacing Outdated Requirements 2025-17528 | Environmental Protection Agency | Proposed rule | Sep 11, 2025 |
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds; Architectural Coatings 2025-17500 | Environmental Protection Agency | Proposed rule | Sep 11, 2025 |
Air Plan Approval; Montana; Regional Haze Plan for the Second Implementation Period; Prong 4 (Visibility) for the 2015 8-Hour Ozone National Ambient Air Quality Standard 2025-17499 | Environmental Protection Agency | Proposed rule | Sep 11, 2025 |
Air Plan Revisions; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds; Solvent Cleaning 2025-17498 | Environmental Protection Agency | Proposed rule | Sep 11, 2025 |
Air Plan Approval; Wyoming; R-35 Wyoming Air Quality Standards and Regulations Rule Package 2025-17486 | Environmental Protection Agency | Final rule | Sep 11, 2025 |
Air Plan Approval; New Jersey; Memorandum of Agreement To Address NOX SIP Call Requirements 2025-17485 | Environmental Protection Agency | Final rule | Sep 11, 2025 |
Air Plan Approval; Texas; Reasonably Available Control Technology in the Dallas-Fort Worth Ozone Nonattainment Area 2025-17081 | Environmental Protection Agency | Proposed rule | Sep 5, 2025 |
Air Plan Approval; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area 2025-17080 | Environmental Protection Agency | Proposed rule | Sep 5, 2025 |
Extension of the Attainment Date of the Coachella Valley Extreme Nonattainment Area Under the 1997 Ozone National Ambient Air Quality Standards 2025-17060 | Environmental Protection Agency | Final rule | Sep 5, 2025 |
Air Plan Approval; OR; Lane County Permitting Rule Revisions 2025-17055 | Environmental Protection Agency | Proposed rule | Sep 5, 2025 |
Air Plan Approval; ID; Regional Haze Plan for the Second Implementation Period 2025-17054 | Environmental Protection Agency | Final rule | Sep 5, 2025 |
Air Plan Approval; Arkansas; Regional Haze State Implementation Plan for the Second Implementation Period 2025-17041 | Environmental Protection Agency | Proposed rule | Sep 5, 2025 |
Air Plan Approval; Missouri; Control of Sulfur Dioxide Emissions and Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants 2025-17028 | Environmental Protection Agency | Final rule | Sep 5, 2025 |
Air Plan Approval; GA; Removal of Nonattainment Area New Source Review 2025-16723 | Environmental Protection Agency | Proposed rule | Sep 2, 2025 |
Air Plan Approval; Ohio; 2015 Ozone Moderate Reasonably Available Control Technology SIP 2025-16484 | Environmental Protection Agency | Proposed rule | Aug 28, 2025 |
Air Plan Approval; Arkansas; Codification of the State Implementation Plan 2025-16483 | Environmental Protection Agency | Proposed rule | Aug 28, 2025 |
Air Plan Approval; Pennsylvania; Motor Vehicle Inspection and Maintenance Program Certification for Moderate Nonattainment Under the 2015 Ozone National Ambient Air Quality Standards 2025-16482 | Environmental Protection Agency | Proposed rule | Aug 28, 2025 |
Air Plan Approval; South Dakota; Regional Haze Plan for the Second Implementation Period 2025-16468 | Environmental Protection Agency | Final rule | Aug 28, 2025 |
Air Plan Approval; California; Mojave Desert Air Quality Management District; Internal Combustion Engines 2025-16466 | Environmental Protection Agency | Final rule | Aug 28, 2025 |
Florida; Approval of State Plan for Control of Emissions From Commercial and Industrial Solid Waste Incineration Units 2025-16193 | Environmental Protection Agency | Final rule | Aug 25, 2025 |
Air Plan Approval; WA; Update to Materials Incorporated by Reference 2025-15992 | Environmental Protection Agency | Final rule | Aug 21, 2025 |
Determination of Attainment by the Attainment Date; 2008 8-Hour Ozone Standards; California; Sacramento Metro Area 2025-15990 | Environmental Protection Agency | Final rule | Aug 21, 2025 |
Air Plan Approval; California; Revised Format for Materials Incorporated by Reference 2025-15989 | Environmental Protection Agency | Final rule | Aug 21, 2025 |
Air Plan Approval; Alabama; Standards for Granting Permits and Major New Source Review Permit Rules 2025-15987 | Environmental Protection Agency | Proposed rule | Aug 21, 2025 |
Air Plan Approval; GA; Removal of Emissions Statements Requirement and Updates To Permit by Rule 2025-15986 | Environmental Protection Agency | Proposed rule | Aug 21, 2025 |
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Petroleum Solvent Dry Cleaning 2025-15984 | Environmental Protection Agency | Proposed rule | Aug 21, 2025 |
Air Plan Approval; North Carolina; Removal of Emissions Exemptions 2025-15557 | Environmental Protection Agency | Proposed rule | Aug 15, 2025 |
Air Plan Approval; Rhode Island; Decommissioning of Stage II Vapor Recovery Systems 2025-15459 | Environmental Protection Agency | Proposed rule | Aug 14, 2025 |
Approval and Promulgation of State Implementation Plans; New York; Emission Statement Certification of the 2008 and 2015 Ozone National Ambient Air Quality Standards 2025-15443 | Environmental Protection Agency | Final rule | Aug 14, 2025 |
Air Plan Approval; IA; Alter Metal Recycling Permit Modification 2025-15442 | Environmental Protection Agency | Final rule | Aug 14, 2025 |
Air Plan Approval; Oregon; Lane Regional Air Protection Agency, Outdoor Burning 2025-15441 | Environmental Protection Agency | Final rule | Aug 14, 2025 |
Air Plan Approval; Wyoming; Revisions to Regional Haze State Implementation Plan 2025-14983 | Environmental Protection Agency | Final rule | Aug 7, 2025 |
Air Plan Approval; Colorado; Inspection and Maintenance Program Revision 2025-14982 | Environmental Protection Agency | Proposed rule | Aug 7, 2025 |
Air Plan Approval; OR; Update to Materials Incorporated by Reference 2025-14971 | Environmental Protection Agency | Final rule | Aug 7, 2025 |
Air Plan Approval; California; South Coast Air Quality Management District 2025-14528 | Environmental Protection Agency | Proposed rule | Jul 31, 2025 |
Air Plan Approval; South Carolina; Second Planning Period Regional Haze Plan 2025-14476 | Environmental Protection Agency | Proposed rule | Jul 31, 2025 |
Finding of Failure To Attain and Reclassification of Area in New York as Serious for the 2015 Ozone National Ambient Air Quality Standards-Shinnecock Indian Nation 2025-14472 | Environmental Protection Agency | Final rule | Jul 31, 2025 |
Air Plan Approval; Rhode Island; Amendments to Motor Vehicle Inspection and Maintenance Program 2025-14105 | Environmental Protection Agency | Proposed rule | Jul 28, 2025 |
Air Plan Approval; Washington; Regional Haze State Implementation Plan for the Second Implementation Period 2025-13957 | Environmental Protection Agency | Proposed rule | Jul 24, 2025 |
Air Plan Approval; Pennsylvania; Redesignation of the Beaver County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2025-13946 | Environmental Protection Agency | Proposed rule | Jul 24, 2025 |
Air Plan Approval; New York; Ortho Clinical Diagnostics 2025-13937 | Environmental Protection Agency | Proposed rule | Jul 24, 2025 |
Air Plan Approval; Texas; Reasonably Available Control Technology in the Dallas-Fort Worth Ozone Nonattainment Area 2025-13930 | Environmental Protection Agency | Proposed rule | Jul 24, 2025 |
Air Plan Revisions; California; Mojave Desert Air Quality Management District; New Source Review; Stationary Source Permits 2025-13906 | Environmental Protection Agency | Proposed rule | Jul 24, 2025 |
Interim Final Determination To Stay or Defer Sanctions; California; Mojave Desert Air Quality Management District 2025-13905 | Environmental Protection Agency | Final rule | Jul 24, 2025 |
Air Plan Approval; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area 2025-13904 | Environmental Protection Agency | Proposed rule | Jul 24, 2025 |
Air Plan Approval; Pennsylvania; Redesignation Request and Associated Maintenance Plan for the Liberty-Clairton Area for the 1997 Annual and 2006 24-Hour Fine Particulate Matter Standard and Maintenance Plan for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard 2025-13893 | Environmental Protection Agency | Final rule | Jul 24, 2025 |
Air Plan Approval; Connecticut; Plan for Inclusion of a Consent Order and Removal of State Orders 2025-13886 | Environmental Protection Agency | Final rule | Jul 24, 2025 |
Air Plan Partial Approval and Partial Disapproval; Colorado; Regional Haze Plan for the Second Implementation Period 2025-13342 | Environmental Protection Agency | Proposed rule | Jul 16, 2025 |
Air Quality State Implementation Plans; Approval and Promulgations: Montana: Infrastructure Requirements for the 2015 Ozone National Ambient Air Quality Standards 2025-13341 | Environmental Protection Agency | Proposed rule | Jul 16, 2025 |
Determination of Attainment by the Attainment Date and Clean Data Determination; California, San Joaquin Valley 1997 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2025-13339 | Environmental Protection Agency | Proposed rule | Jul 16, 2025 |
Air Plan Approval; State of Utah; Utah PM2.5 State Implementation Plan Revisions 2025-13337 | Environmental Protection Agency | Proposed rule | Jul 16, 2025 |
Air Plan Approval; Connecticut; 2017 Base Year Emissions Inventory for the 2015 8-Hour Ozone National Ambient Air Quality Standards 2025-13331 | Environmental Protection Agency | Final rule | Jul 16, 2025 |
Air Plan Approval; Minnesota; Exempt Source SIP Revision 2025-13327 | Environmental Protection Agency | Proposed rule | Jul 16, 2025 |
Air Plan Approval; Connecticut; State Implementation Plan Revisions Required as a Result of a Definition Change Due to the Ozone Reclassification 2025-13324 | Environmental Protection Agency | Proposed rule | Jul 16, 2025 |
Air Plan Approval; California; Mojave Desert Air Quality Management District; Definition of Terms 2025-12867 | Environmental Protection Agency | Proposed rule | Jul 10, 2025 |
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; San Joaquin Valley 2025-12856 | Environmental Protection Agency | Proposed rule | Jul 10, 2025 |
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma 2025-12800 | Environmental Protection Agency | Proposed rule | Jul 10, 2025 |
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer 2025-12798 | Environmental Protection Agency | Final rule | Jul 10, 2025 |
Air Plan Approval; Florida; Revisions to Stationary Sources-Removal of Clean Air Interstate Rule Provisions 2025-12602 | Environmental Protection Agency | Final rule | Jul 7, 2025 |
Air Plan Approval; California; Revised Format for Nonregulatory Provisions 2025-12586 | Environmental Protection Agency | Final rule | Jul 7, 2025 |
Air Plan Approval; West Virginia; Regional Haze State Implementation Plan for the Second Implementation Period 2025-12527 | Environmental Protection Agency | Final rule | Jul 7, 2025 |
Air Plan Approval; Connecticut; 2014 and 2017 Periodic Emissions Inventory for 2008 8-Hour Ozone NAAQS 2025-12515 | Environmental Protection Agency | Proposed rule | Jul 7, 2025 |
Air Plan Approval; Ohio; Moderate Attainment Plan Elements for the Cleveland Area for the 2015 Ozone Standard 2025-12512 | Environmental Protection Agency | Final rule | Jul 7, 2025 |
Air Plan Approval; Oklahoma; Revisions to Air Pollution Control Rules 2025-12508 | Environmental Protection Agency | Proposed rule | Jul 7, 2025 |
Air Plan Approval; Missouri; Control of Sulfur Dioxide Emissions and Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants 2025-11825 | Environmental Protection Agency | Proposed rule | Jun 27, 2025 |
Air Plan Approval; Idaho; Update to Materials Incorporated by Reference 2025-11824 | Environmental Protection Agency | Final rule | Jun 27, 2025 |
Air Plan Approval; Missouri; Definitions and Common Reference Tables 2025-11821 | Environmental Protection Agency | Proposed rule | Jun 27, 2025 |
Air Plan Approval; California; San Joaquin Valley 1-Hour Ozone Area; Maintenance Plan and Redesignation Request 2025-11413 | Environmental Protection Agency | Proposed rule | Jun 23, 2025 |
New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana 2025-11341 | Environmental Protection Agency | Proposed rule | Jun 23, 2025 |
Finding of Failure To Attain for the Missouri Portion of the St. Louis Nonattainment Area for the 2015 Ozone National Ambient Air Quality Standards 2025-11304 | Environmental Protection Agency | Proposed rule | Jun 20, 2025 |
Determination To Defer Sanctions; California; Eastern Kern Air Pollution Control District; Stationary Combustion Turbines 2025-11283 | Environmental Protection Agency | Final rule | Jun 20, 2025 |
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Stationary Combustion Turbines 2025-11281 | Environmental Protection Agency | Proposed rule | Jun 20, 2025 |
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma 2025-11265 | Environmental Protection Agency | Final rule | Jun 20, 2025 |
Air Plan Approval; Colorado; Interim Final Determination to Stay and Defer Sanctions in the Denver Metro/North Front Range 2008 Ozone Nonattainment Area 2025-11266 | Environmental Protection Agency | Final rule | Jun 18, 2025 |
Air Plan Approval; Colorado; Serious Attainment Plan RACT Requirements for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area 2025-11263 | Environmental Protection Agency | Proposed rule | Jun 18, 2025 |
Air Plan Approval; West Virginia; 2024 Amendments to West Virginia's Ambient Air Quality Standards 2025-10548 | Environmental Protection Agency | Proposed rule | Jun 11, 2025 |
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program Certification 2025-10546 | Environmental Protection Agency | Proposed rule | Jun 11, 2025 |
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Correction 2025-10541 | Environmental Protection Agency | Final rule | Jun 11, 2025 |
Air Plan Approval; Florida; Second Planning Period Regional Haze Plan 2025-10035 | Environmental Protection Agency | Final rule | Jun 5, 2025 |
Air Plan Approval; California; Revised Format for Materials Incorporated by Reference 2025-10000 | Environmental Protection Agency | Final rule | Jun 4, 2025 |
Air Plan Approval; IA; Alter Metal Recycling Permit Modification 2025-10038 | Environmental Protection Agency | Proposed rule | Jun 3, 2025 |
Determination of Attainment by the Attainment Date; California; Mariposa County; 2015 8-Hour Ozone National Ambient Air Quality Standards 2025-09999 | Environmental Protection Agency | Proposed rule | Jun 3, 2025 |
Clean Data Determination and Approval of Base Year Emissions Inventory; California; Los Angeles-South Coast Air Basin; 189(d) Plan for the 2006 24-Hour PM2.5 NAAQS 2025-09997 | Environmental Protection Agency | Final rule | Jun 3, 2025 |
Air Plan Approval; New Jersey; Memorandum of Agreement To Address NOX SIP Call Requirements 2025-09996 | Environmental Protection Agency | Proposed rule | Jun 3, 2025 |
Air Plan Approval; Oregon; Lane Regional Air Protection Agency, Outdoor Burning 2025-09324 | Environmental Protection Agency | Proposed rule | May 23, 2025 |
Air Plan Approval; Texas; New Source Review Updates for Project Emissions Accounting 2025-08734 | Environmental Protection Agency | Final rule | May 19, 2025 |
Air Plan Approval; Ohio; Second Maintenance Plan for 2008 Ozone NAAQS 2025-08728 | Environmental Protection Agency | Proposed rule | May 19, 2025 |
Air Plan Approval; South Dakota; Regional Haze Plan for the Second Implementation Period 2025-08072 | Environmental Protection Agency | Proposed rule | May 14, 2025 |
Air Plan Approval; Alabama; Administrative Corrections and VOC Definition 2025-08091 | Environmental Protection Agency | Final rule | May 9, 2025 |
Air Plan Approval; WA; Southwest Clean Air Agency; Revisions to Excess Emissions, Startup, Shutdown, and General Requirements 2025-07846 | Environmental Protection Agency | Final rule | May 9, 2025 |
Air Quality Plans; California; Tehama County Air Pollution Control District; New Source Review 2025-08087 | Environmental Protection Agency | Final rule | May 8, 2025 |
Approval and Promulgation of State Implementation Plans; New York; Emission Statement Certification of the 2008 and 2015 Ozone National Ambient Air Quality Standards 2025-08077 | Environmental Protection Agency | Proposed rule | May 8, 2025 |
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer 2025-08074 | Environmental Protection Agency | Proposed rule | May 8, 2025 |
Air Plan Approval; Colorado; Interim Final Determination To Stay and Defer Sanctions in the Denver Metro/North Front Range 2008 Ozone Nonattainment Area 2025-07938 | Environmental Protection Agency | Final rule | May 8, 2025 |
Air Plan Approval; Colorado; Serious Attainment Plan Contingency Measures for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area 2025-07937 | Environmental Protection Agency | Proposed rule | May 8, 2025 |
Air Plan Approval; Kansas; Annual Emission Inventory and Fees 2025-07261 | Environmental Protection Agency | Final rule | Apr 28, 2025 |
Air Plan Approval; Pennsylvania; Redesignation of the Allegheny County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2025-07255 | Environmental Protection Agency | Final rule | Apr 28, 2025 |
Air Plan Approval; Wisconsin; Revised Format for Materials Incorporated by Reference 2025-06618 | Environmental Protection Agency | Final rule | Apr 22, 2025 |
Air Plan Approval; Connecticut; State Implementation Plan Revisions Required by the 2015 Ozone NAAQS 2025-06610 | Environmental Protection Agency | Final rule | Apr 22, 2025 |
Air Plan Approval; West Virginia; Regional Haze State Implementation Plan for the Second Implementation Period 2025-06608 | Environmental Protection Agency | Proposed rule | Apr 18, 2025 |
Air Plan Approval; Ohio; Volatile Organic Compounds 2025-06604 | Environmental Protection Agency | Final rule | Apr 17, 2025 |
Air Plan Approval; Washington; Spokane Regional Clean Air Agency, General Air Quality Regulations 2025-06247 | Environmental Protection Agency | Final rule | Apr 16, 2025 |
Air Plan Approval; Texas; Vehicle Inspection and Maintenance Plan for Bexar County 2025-05928 | Environmental Protection Agency | Final rule | Apr 8, 2025 |
Air Plan Approval; Pennsylvania; Redesignation Request and Associated Maintenance Plan for the Liberty-Clairton Area for the 1997 Annual and 2006 24-Hour Fine Particulate Matter Standard and Maintenance Plan for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard 2025-05921 | Environmental Protection Agency | Proposed rule | Apr 7, 2025 |
Air Plan Approval; Connecticut; 2017 Base Year Emissions Inventory for the 2015 8-Hour Ozone National Ambient Air Quality Standards 2025-05910 | Environmental Protection Agency | Proposed rule | Apr 7, 2025 |
Approval of Source-Specific Air Quality Implementation Plan; New York; Lehigh Cement Company LLC 2025-05372 | Environmental Protection Agency | Final rule | Apr 3, 2025 |
Interim Final Determination To Defer Sanctions, Placer County Air Pollution Control District 2025-05376 | Environmental Protection Agency | Final rule | Apr 2, 2025 |
Air Plan Revision; California; Placer County Air Pollution Control District; New Source Review 2025-05375 | Environmental Protection Agency | Proposed rule | Apr 2, 2025 |
Air Plan Approval; Connecticut; Approval of State Implementation Plan Requirements for the 2008 Ozone Standard 2025-05378 | Environmental Protection Agency | Final rule | Apr 1, 2025 |
Air Plan Approval; Florida; Revisions to Stationary Sources-Removal of Clean Air Interstate Rule Provisions 2025-05382 | Environmental Protection Agency | Proposed rule | Mar 28, 2025 |
Interim Final Determination To Stay or Defer Sanctions; California; Antelope Valley Air Quality Management District 2025-05157 | Environmental Protection Agency | Final rule | Mar 26, 2025 |
Air Plan Revisions; California; Antelope Valley Air Quality Management District; New Source Review; Stationary Source Permits 2025-05156 | Environmental Protection Agency | Proposed rule | Mar 26, 2025 |
Air Plan Approval; New York; Knowlton Technologies LLC 2025-04910 | Environmental Protection Agency | Final rule | Mar 24, 2025 |
Air Plan Approval; AK, Fairbanks North Star Borough; 2006 24-Hour PM2.5 Serious Area and 189(d) Plan 2025-04908 | Environmental Protection Agency | Proposed rule | Mar 24, 2025 |
Air Plan Approval; ID; Regional Haze Plan for the Second Implementation Period 2025-04906 | Environmental Protection Agency | Proposed rule | Mar 24, 2025 |
Determination of Attainment by the Attainment Date; 2008 8-Hour Ozone Standards; California; Sacramento Metro Area 2025-04791 | Environmental Protection Agency | Proposed rule | Mar 21, 2025 |
Interim Final Determination To Stay and Defer Sanctions; California; Sacramento Metro Area 2025-04790 | Environmental Protection Agency | Final rule | Mar 21, 2025 |
Air Plan Revisions; California; Feather River Air Quality Management District 2025-04041 | Environmental Protection Agency | Final rule | Mar 19, 2025 |
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Tehama County Air Pollution Control District; San Diego County Air Pollution Control District; Emissions Statement Requirements 2025-04036 | Environmental Protection Agency | Final rule | Mar 18, 2025 |
Extension of the Attainment Date of the Coachella Valley Extreme Nonattainment Area Under the 1997 Ozone National Ambient Air Quality Standards 2025-04035 | Environmental Protection Agency | Proposed rule | Mar 17, 2025 |
Air Plan Approval; Alabama; Administrative Corrections and VOC Definition 2025-03608 | Environmental Protection Agency | Proposed rule | Mar 7, 2025 |
Air Plan Approval; New Jersey; Permits and Certificates for Minor Facilities (and Major Facilities Without an Operating Permit), and Air Emission Control and Permitting Exemptions 2025-03205 | Environmental Protection Agency | Final rule | Feb 28, 2025 |
Air Plan Revisions; California Air Plan Revisions; San Joaquin Valley Unified Air Pollution Control District; Stationary Source Permits 2025-01220 | Environmental Protection Agency | Proposed rule | Jan 21, 2025 |
Interim Final Determination To Defer Sanctions, San Joaquin Valley Unified Air Pollution Control District 2025-01215 | Environmental Protection Agency | Final rule | Jan 21, 2025 |
Approval and Promulgation of Implementation Plans; State of California; Coachella Valley; Extreme Attainment Plan for 1997 8-Hour Ozone Standards 2025-01110 | Environmental Protection Agency | Final rule | Jan 21, 2025 |
Air Plan Disapproval; West Virginia; Regional Haze State Implementation Plan for the Second Implementation Period 2025-01101 | Environmental Protection Agency | Proposed rule | Jan 21, 2025 |
Air Plan Approval; Ohio; Withdrawal of Technical Amendment 2025-00968 | Environmental Protection Agency | Final rule | Jan 21, 2025 |
Air Plan Partial Approval and Partial Disapproval; South Carolina; Minor Source Permit Program Revisions 2025-00438 | Environmental Protection Agency | Proposed rule | Jan 21, 2025 |
Air Plan Approval; AK; Updates to Materials Incorporated by Reference 2025-01120 | Environmental Protection Agency | Final rule | Jan 17, 2025 |
Air Plan Approval; Washington; Olympic Region Clean Air Agency, Recreational Fires 2025-00559 | Environmental Protection Agency | Final rule | Jan 17, 2025 |
State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards 2025-00336 | Environmental Protection Agency | Final rule | Jan 17, 2025 |
Revisions to the Federal Implementation Plan for the Billings/Laurel, Montana, Sulfur Dioxide Area 2025-00220 | Environmental Protection Agency | Final rule | Jan 17, 2025 |
Air Plan Approval; Montana; Missoula, Montana Oxygenated Fuels Program Removal, Carbon Monoxide, Limited Maintenance Plan 2025-00380 | Environmental Protection Agency | Final rule | Jan 16, 2025 |
Air Plan Approval; Arizona; Maricopa County Air Quality Department 2024-31701 | Environmental Protection Agency | Final rule | Jan 16, 2025 |
Air Plan Approval; Kansas; Annual Emission Inventory and Fees 2024-31626 | Environmental Protection Agency | Proposed rule | Jan 15, 2025 |
Air Plan Revisions; Arizona; Maricopa County Air Quality Department 2024-31028 | Environmental Protection Agency | Final rule | Jan 10, 2025 |
Interim Final Determination To Defer Sanctions; AK, Fairbanks North Star Borough 2024-30649 | Environmental Protection Agency | Final rule | Jan 8, 2025 |
Air Plan Approval; AK, Fairbanks North Star Borough; 2006 24-Hour PM2.5 Serious Area and 189(d) Plan 2024-30648 | Environmental Protection Agency | Proposed rule | Jan 8, 2025 |
Air Plan Approval; Ohio; Moderate Attainment Plan Elements for the Cleveland Area for the 2015 Ozone Standard 2024-30717 | Environmental Protection Agency | Proposed rule | Jan 3, 2025 |
Air Plan Revisions; California; Feather River Air Quality Management District 2024-31396 | Environmental Protection Agency | Final rule | Dec 31, 2024 |
Federal Implementation Plan for Nonattainment New Source Review Program; Mojave Desert Air Quality Management District, California 2024-30513 | Environmental Protection Agency | Final rule | Dec 30, 2024 |
Outer Continental Shelf Air Regulations; Amendment to State Requirements Incorporated by Reference; Massachusetts 2024-30800 | Environmental Protection Agency | Final rule | Dec 27, 2024 |
Air Plan Approval; Florida; Second Planning Period Regional Haze Plan 2024-30751 | Environmental Protection Agency | Proposed rule | Dec 27, 2024 |
Air Plan Approval; KY; Revisions to Jefferson County Control of Open Burning 2024-30741 | Environmental Protection Agency | Final rule | Dec 27, 2024 |
Air Plan Approval; Indiana; Update to CFR References 2024-30729 | Environmental Protection Agency | Final rule | Dec 27, 2024 |
Air Plan Approval; Revisions to Colorado Common Provisions Regulation 2024-30695 | Environmental Protection Agency | Final rule | Dec 27, 2024 |
Air Plan Approval; WA; Excess Emissions, Startup, Shutdown, and Malfunction Revisions, Energy Facility Site Evaluation Council 2024-30536 | Environmental Protection Agency | Final rule | Dec 27, 2024 |
Air Plan Approval; Delaware; 2022 Amendments to Delaware's Ambient Air Quality Standards 2024-30404 | Environmental Protection Agency | Final rule | Dec 23, 2024 |
Regional Haze Third Implementation Period; Extension of the State Implementation Plan Due Date 2024-30212 | Environmental Protection Agency | Proposed rule | Dec 23, 2024 |
Air Plan Disapproval; Texas; Attainment Demonstrations for the Dallas-Fort Worth and Houston-Galveston-Brazoria Nonattainment Areas 2024-29971 | Environmental Protection Agency | Proposed rule | Dec 23, 2024 |
Air Plan Approval; Georgia; Update to Materials Incorporated by Reference 2024-30253 | Environmental Protection Agency | Final rule | Dec 20, 2024 |
Air Plan Disapproval; Texas; Control of Air Pollution From Visible Emissions and Particulate Matter 2024-29956 | Environmental Protection Agency | Final rule | Dec 20, 2024 |
Air Plan Revisions; California; California Mobile Source Regulations 2024-30246 | Environmental Protection Agency | Proposed rule | Dec 19, 2024 |
Air Plan Disapproval; Texas; Houston-Galveston-Brazoria Area Section 185 Fee Program; Cessation of Program 2024-29935 | Environmental Protection Agency | Proposed rule | Dec 19, 2024 |
Finding of Failure To Attain and Reclassification of Las Vegas Area as Serious for the 2015 Ozone National Ambient Air Quality Standards 2024-29061 | Environmental Protection Agency | Final rule | Dec 19, 2024 |
Partial Approval and Disapproval of Air Quality Implementation Plans; Arizona; Regional Haze State Implementation Plan for the Second Implementation Period and Prong 4 (Visibility) for the 2015 Ozone and 2012 Particulate Matter Standards 2024-29508 | Environmental Protection Agency | Final rule | Dec 18, 2024 |
Approval of Air Quality Implementation Plans; New Jersey; Permits and Certificates for Minor Facilities (and Major Facilities Without an Operating Permit), and Air Emission Control and Permitting Exemptions 2024-29525 | Environmental Protection Agency | Proposed rule | Dec 17, 2024 |
Redesignation of Portions of Westmoreland and Cambria Counties, Pennsylvania for the 2010 Sulfur Dioxide (SO2) National Ambient Air Quality Standards (NAAQS) 2024-29229 | Environmental Protection Agency | Final rule | Dec 17, 2024 |
Findings of Failure To Attain and Reclassification of Areas in Illinois, Indiana, Michigan, Ohio, and Wisconsin as Serious for the 2015 Ozone National Ambient Air Quality Standards 2024-29137 | Environmental Protection Agency | Final rule | Dec 17, 2024 |
Denial of Request for Attainment Date Extension, Finding of Failure To Attain, and Reclassification of an Area in Utah as Moderate for the 2015 Ozone National Ambient Air Quality Standards 2024-29246 | Environmental Protection Agency | Final rule | Dec 16, 2024 |
Air Quality Plans; Arizona; Maricopa County Air Quality Department; Source-Specific SIP Revision 2024-28910 | Environmental Protection Agency | Final rule | Dec 16, 2024 |
Air Plan Approval; Pennsylvania; Redesignation of the Allegheny County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2024-28536 | Environmental Protection Agency | Proposed rule | Dec 11, 2024 |
Air Plan Approval; WA; Southwest Clean Air Agency; Revisions to Excess Emissions, Startup, Shutdown, and General Requirements 2024-28804 | Environmental Protection Agency | Proposed rule | Dec 10, 2024 |
Finding of Failure To Attain and Reclassification of an Area in Utah as Serious for the 2015 Ozone National Ambient Air Quality Standards 2024-28851 | Environmental Protection Agency | Final rule | Dec 9, 2024 |
Air Plan Revisions; Arizona; Maricopa County Air Quality Department 2024-28537 | Environmental Protection Agency | Final rule | Dec 9, 2024 |
Air Plan Approval; ID; Revisions to Air Quality Regulations 2024-28364 | Environmental Protection Agency | Final rule | Dec 5, 2024 |
Air Plan Approval; California; Mojave Desert Air Quality Management District 2024-27627 | Environmental Protection Agency | Final rule | Dec 4, 2024 |
Air Plan Partial Approval and Partial Disapproval; Wyoming; Regional Haze Plan for the Second Implementation Period 2024-27942 | Environmental Protection Agency | Final rule | Dec 2, 2024 |
Air Plan Partial Approval and Partial Disapproval; Utah; Regional Haze State Implementation Plan for the Second Implementation Period; Air Plan Disapproval; Utah; Prong 4 (Visibility) for the 2015 8-Hour Ozone National Ambient Air Quality Standard 2024-27941 | Environmental Protection Agency | Final rule | Dec 2, 2024 |
Air Plan Partial Approval and Partial Disapproval; North Dakota; Regional Haze State Implementation Plan for the Second Implementation Period 2024-27940 | Environmental Protection Agency | Final rule | Dec 2, 2024 |
Air Plan Approval; New York; Knowlton Technologies LLC 2024-27594 | Environmental Protection Agency | Proposed rule | Nov 26, 2024 |
Clean Data Determination and Proposed Approval of Base Year Emissions Inventory; California; Los Angeles-South Coast Air Basin; 189(d) Plan for the 2006 24-Hour PM2.5 NAAQS 2024-27517 | Environmental Protection Agency | Proposed rule | Nov 25, 2024 |
Finding of Failure To Attain and Reclassification of the Missouri Portion of the St. Louis Nonattainment Area as Serious for the 2015 Ozone National Ambient Air Quality Standards 2024-27382 | Environmental Protection Agency | Final rule | Nov 25, 2024 |
Air Plan Approval; Wisconsin; Nitrogen Oxide Emissions Control Requirements 2024-26114 | Environmental Protection Agency | Final rule | Nov 22, 2024 |
Air Plan Approval; Connecticut; Approval of State Implementation Plan Requirements for the 2008 Ozone Standard 2024-27050 | Environmental Protection Agency | Proposed rule | Nov 21, 2024 |
Air Plan Approval; Shelby County, Tennessee; Revisions to Startup, Shutdown, and Malfunction Rules 2024-26928 | Environmental Protection Agency | Final rule | Nov 20, 2024 |
Air Plan Approval and Attainment Date Extension; 1997 Annual Fine Particulate Matter Nonattainment Area; San Joaquin Valley, California 2024-25946 | Environmental Protection Agency | Final rule | Nov 19, 2024 |
Air Plan Approval; ID; Update to Materials Incorporated by Reference 2024-26506 | Environmental Protection Agency | Final rule | Nov 18, 2024 |
Air Plan Approval; Connecticut; New Haven and Fairfield Counties Second 10-Year Limited Maintenance Plan for the 2006 24-Hour PM2.5 Standard 2024-26329 | Environmental Protection Agency | Final rule | Nov 15, 2024 |
Air Plan Approval; Washington; Spokane Regional Clean Air Agency, General Air Quality Regulations 2024-26171 | Environmental Protection Agency | Proposed rule | Nov 14, 2024 |
Air Quality: Revision to the Regulatory Definition of Volatile Organic Compounds-Exclusion of (Z)-1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(Z)) 2024-25971 | Environmental Protection Agency | Proposed rule | Nov 12, 2024 |
Air Plan Revisions; Arizona; Maricopa County Air Quality Department 2024-25947 | Environmental Protection Agency | Proposed rule | Nov 8, 2024 |
Inflation Adjustment References for Civil Monetary Penalty Amounts in Title 40 of the Code of Federal Regulations 2024-25669 | Environmental Protection Agency | Final rule | Nov 8, 2024 |
Approval and Promulgation of Air Quality Implementation Plans; New Hampshire; Regional Haze State Implementation Plan for the Second Implementation Period 2024-25679 | Environmental Protection Agency | Final rule | Nov 7, 2024 |
Air Plan Approval; Arizona; Yuma 2015 8-Hour Ozone Nonattainment Area; Redesignation Request and Maintenance Plan 2024-25575 | Environmental Protection Agency | Proposed rule | Nov 5, 2024 |
Air Plan Revisions; California; San Diego County Air Pollution Control District and Mojave Desert Air Quality Management District 2024-25560 | Environmental Protection Agency | Final rule | Nov 4, 2024 |
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program 2024-25460 | Environmental Protection Agency | Final rule | Nov 4, 2024 |
Air Plan Approval; Forsyth County, North Carolina; Removal of Excess Emissions Provisions 2024-25392 | Environmental Protection Agency | Final rule | Oct 31, 2024 |
Air Plan Approval; KY; Revisions to Jefferson County Control of Open Burning 2024-25244 | Environmental Protection Agency | Proposed rule | Oct 31, 2024 |
Regional Office Address 2024-25014 | Environmental Protection Agency | Final rule | Oct 31, 2024 |
Air Plan Approval; Revisions to Colorado Common Provisions Regulation 2024-25228 | Environmental Protection Agency | Proposed rule | Oct 30, 2024 |
Air Plan Approval; Wisconsin; SIP Alignment Revision 2024-25032 | Environmental Protection Agency | Final rule | Oct 29, 2024 |
Interim Final Determination To Stay or Defer Sanctions; California; San Joaquin Valley Unified Air Pollution Control District 2024-24707 | Environmental Protection Agency | Final rule | Oct 25, 2024 |
Conditional Approval; Contingency Measure State Implementation Plan for the 2008 Ozone Standard; San Joaquin Valley, California 2024-24706 | Environmental Protection Agency | Proposed rule | Oct 25, 2024 |
Air Plan Approval; Washington; Olympic Region Clean Air Agency, Recreational Fires 2024-24714 | Environmental Protection Agency | Proposed rule | Oct 24, 2024 |
Air Plan Approval; WA; Excess Emissions, Startup, Shutdown, and Malfunction Revisions, Energy Facility Site Evaluation Council 2024-24211 | Environmental Protection Agency | Proposed rule | Oct 22, 2024 |
Approval and Promulgation of Air Quality Implementation Plan; Delaware; Regional Haze State Implementation Plan for the Second Implementation Period 2024-24196 | Environmental Protection Agency | Final rule | Oct 22, 2024 |
Air Quality Plans; California; San Diego County Air Pollution Control District; Permit Program 2024-24223 | Environmental Protection Agency | Final rule | Oct 21, 2024 |
Air Plan Approval; California; South Coast Air Quality Management District 2024-24219 | Environmental Protection Agency | Final rule | Oct 21, 2024 |
Air Plan Approval; Montana; Missoula, Montana Oxygenated Fuels Program Removal, Carbon Monoxide, Limited Maintenance Plan 2024-23589 | Environmental Protection Agency | Proposed rule | Oct 15, 2024 |
Revisions to the Federal Implementation Plan for the Billings/Laurel, Montana, Sulfur Dioxide Area 2024-23568 | Environmental Protection Agency | Proposed rule | Oct 15, 2024 |
Air Plan Approvals; Arizona; California; Correcting Amendments 2024-23423 | Environmental Protection Agency | Final rule | Oct 11, 2024 |
Air Plan Approval; Texas; Vehicle Inspection and Maintenance Plan for Bexar County 2024-23340 | Environmental Protection Agency | Proposed rule | Oct 11, 2024 |
Air Plan Approval; New Mexico; Periodic Emission Inventory SIP for Sunland Park Nonattainment Area for 2015 Ozone NAAQS 2024-23339 | Environmental Protection Agency | Final rule | Oct 11, 2024 |
Air Plan Approval; Texas; New Source Review Updates for Project Emissions Accounting 2024-23282 | Environmental Protection Agency | Proposed rule | Oct 11, 2024 |
Approval and Promulgation of Implementation Plans; California; California Mobile Source Regulations 2024-23270 | Environmental Protection Agency | Proposed rule | Oct 11, 2024 |
Air Plan Approval; OR; Regional Haze Plan for the Second Implementation Period 2024-22603 | Environmental Protection Agency | Final rule | Oct 8, 2024 |
Air Plan Approval; Ohio; Volatile Organic Compounds 2024-23140 | Environmental Protection Agency | Proposed rule | Oct 7, 2024 |
Clean Air Plans; Contingency Measures for the Fine Particulate Matter Standards; San Joaquin Valley, California 2024-22681 | Environmental Protection Agency | Final rule | Oct 4, 2024 |
Air Plan Approval; District of Columbia, Maryland, and Virginia; Update of the Motor Vehicle Emissions Budgets for the Washington-MD-VA 2008 8-Hour Ozone National Ambient Air Quality Standard Maintenance Area 2024-22535 | Environmental Protection Agency | Final rule | Oct 4, 2024 |
State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards 2024-22008 | Environmental Protection Agency | Proposed rule | Oct 4, 2024 |
Air Plan Approval; Pennsylvania; Oil and Natural Gas Control Measures for 2008 and 2015 Ozone National Ambient Air Quality Standards 2024-22386 | Environmental Protection Agency | Final rule | Oct 1, 2024 |
Designation of Areas for Air Quality Planning Purposes; Redesignation Request and Associated Maintenance Plan for Whatcom County, WA 2010 SO2 Nonattainment Area 2024-22171 | Environmental Protection Agency | Proposed rule | Sep 27, 2024 |
Air Plan Approval; FL; Surface Coating of Miscellaneous Metal Parts and Products Amendments 2024-22135 | Environmental Protection Agency | Final rule | Sep 27, 2024 |
Air Plan Approval; Connecticut; State Implementation Plan Revisions Required by the 2015 Ozone NAAQS 2024-22115 | Environmental Protection Agency | Proposed rule | Sep 27, 2024 |
Air Plan Approval; Connecticut; New Haven and Fairfield Counties Second 10-Year Limited Maintenance Plan for the 2006 24-Hour PM2.5 Standard 2024-22114 | Environmental Protection Agency | Proposed rule | Sep 27, 2024 |
Air Plan Revisions; California; San Diego County Air Pollution Control District and Mojave Desert Air Quality Management District 2024-21646 | Environmental Protection Agency | Proposed rule | Sep 23, 2024 |
Air Plan Revisions; California; San Diego County Air Pollution Control District 2024-21494 | Environmental Protection Agency | Final rule | Sep 20, 2024 |
Approval and Promulgation of Air Quality Implementation Plans; Connecticut; Regional Haze State Implementation Plan for the Second Implementation Period 2024-21041 | Environmental Protection Agency | Final rule | Sep 17, 2024 |
Air Plan Approval; Montana; Missoula, Montana, Air Rule Revisions 2024-20997 | Environmental Protection Agency | Proposed rule | Sep 17, 2024 |
Air Plan Approval; New Hampshire; Ambient Air Quality Standards 2024-20721 | Environmental Protection Agency | Final rule | Sep 13, 2024 |
Air Plan Approval; Shelby County, Tennessee; Revisions To Startup, Shutdown, and Malfunction Rules 2024-20669 | Environmental Protection Agency | Proposed rule | Sep 12, 2024 |
Air Plan Approval; Forsyth County, North Carolina; Removal of Excess Emissions Provisions 2024-20666 | Environmental Protection Agency | Proposed rule | Sep 12, 2024 |
Outer Continental Shelf Air Regulations; Amendment to State Requirements Incorporated; Massachusetts 2024-20119 | Environmental Protection Agency | Proposed rule | Sep 11, 2024 |
Air Plan Approval; California; Feather River Air Quality Management District 2024-19848 | Environmental Protection Agency | Proposed rule | Sep 5, 2024 |
Approval and Promulgation of State Implementation Plans; New Jersey; Elements of the 2008 and 2015 Ozone National Ambient Air Quality Standards 2024-19581 | Environmental Protection Agency | Final rule | Sep 4, 2024 |
Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; Arizona; 2015 Ozone Infrastructure Requirements 2024-17711 | Environmental Protection Agency | Final rule | Sep 4, 2024 |
Air Plan Approval; New Jersey; NOX SIP Call and Removal of CAIR 2024-19699 | Environmental Protection Agency | Final rule | Sep 3, 2024 |
Air Plan Disapproval; Texas; Control of Air Pollution From Visible Emissions and Particulate Matter 2024-19600 | Environmental Protection Agency | Proposed rule | Sep 3, 2024 |
Air Plan Approval; Wisconsin; Infrastructure SIP Requirements for the 2015 Ozone NAAQS 2024-19548 | Environmental Protection Agency | Final rule | Aug 30, 2024 |
Air Plan Revisions; California; Motor Vehicle Inspection and Maintenance Program 2024-19374 | Environmental Protection Agency | Final rule | Aug 30, 2024 |
Conditional Approval of Arizona State Implementation Plan Revisions; Maricopa County Air Quality Department; Mobile Source Emission Reduction Credits 2024-18570 | Environmental Protection Agency | Proposed rule | Aug 22, 2024 |
Air Plan Revisions; Arizona; Maricopa County Air Quality Department 2024-17500 | Environmental Protection Agency | Final rule | Aug 20, 2024 |
Air Plan Partial Approval and Partial Disapproval; Utah; Regional Haze State Implementation Plan for the Second Implementation Period; Air Plan Disapproval; Utah; Interstate Transport of Air Pollution for the 2015 8-Hour Ozone National Ambient Air Quality Standards 2024-18462 | Environmental Protection Agency | Proposed rule | Aug 19, 2024 |
Air Plan Revisions; Arizona; Maricopa County Air Quality Department 2024-18458 | Environmental Protection Agency | Proposed rule | Aug 19, 2024 |
Air Quality Plans; Arizona; Maricopa County Air Quality Department; Source-Specific SIP Revision 2024-18386 | Environmental Protection Agency | Proposed rule | Aug 19, 2024 |
Air Plan Approval; WA; Update to Materials Incorporated by Reference 2024-16953 | Environmental Protection Agency | Final rule | Aug 19, 2024 |
Air Plan Approval and Disapproval; Pennsylvania; Reasonably Available Control Technology (RACT) for Volatile Organic Compounds (VOC) Under the 2008 Ozone National Ambient Air Quality Standards (NAAQS) 2024-18162 | Environmental Protection Agency | Final rule | Aug 16, 2024 |
Air Plan Approval; West Virginia; Revision to the State Operating Permits Program Under Title V of the Clean Air Act To Revise 45 Code of State Rules 33; Acid Rain Provisions and Permits 2024-18161 | Environmental Protection Agency | Proposed rule | Aug 16, 2024 |
Air Plan Approval; Delaware; 2022 Amendments to the Delaware's Ambient Air Quality Standards 2024-18160 | Environmental Protection Agency | Proposed rule | Aug 16, 2024 |
Air Plan Approval; Indiana; Ozone SIP Modifications Due to the Municipal Solid Waste Landfill Update 2024-17991 | Environmental Protection Agency | Final rule | Aug 16, 2024 |
Air Plan Approval; Indiana; Update to CFR References 2024-17913 | Environmental Protection Agency | Proposed rule | Aug 16, 2024 |
Air Plan Approval; Nebraska; Revisions to Title 129 of the Nebraska Administrative Code; Nebraska Air Quality Regulations 2024-17672 | Environmental Protection Agency | Final rule | Aug 16, 2024 |
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program 2024-18173 | Environmental Protection Agency | Proposed rule | Aug 15, 2024 |
Approval and Promulgation of Air Quality Implementation Plans; New York; Regional Haze State Implementation Plan for the Second Implementation Period 2024-18064 | Environmental Protection Agency | Final rule | Aug 15, 2024 |
Air Plan Approval; California; Ventura County Air Pollution Control District 2024-17578 | Environmental Protection Agency | Final rule | Aug 15, 2024 |
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; Los Angeles-South Coast Air Basin 2024-17573 | Environmental Protection Agency | Proposed rule | Aug 15, 2024 |
Air Plan Approval; North Dakota; Approval of Air Quality Implementation Plans; Regional Haze State Implementation Plan; Regional Haze Five Year Progress Report and Nitrogen Oxides Best Available Retrofit Technology Determination for Coal Creek Station for the First Implementation Period 2024-17471 | Environmental Protection Agency | Proposed rule | Aug 14, 2024 |
Partial Approval and Partial Disapproval of Air Quality State Implementation Plans; New Jersey; 2015 Ozone Infrastructure 2024-17335 | Environmental Protection Agency | Final rule | Aug 9, 2024 |
Air Plan Approval; Kansas; Regional Haze 2024-17182 | Environmental Protection Agency | Final rule | Aug 7, 2024 |
Air Plan Approval and Conditional Approval; Colorado; Regulation Numbers 7 and 21 and RACT Requirements for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area 2024-17091 | Environmental Protection Agency | Proposed rule | Aug 6, 2024 |
Air Plan Partial Approval and Partial Disapproval; Wyoming; Regional Haze Plan for the Second Implementation Period 2024-16718 | Environmental Protection Agency | Proposed rule | Aug 1, 2024 |
Clean Air Act Title V Operating Permit Program Revision; West Virginia 2024-16568 | Environmental Protection Agency | Final rule | Jul 30, 2024 |
Air Plan Approval; FL; Surface Coating of Miscellaneous Metal Parts and Products Amendments 2024-16542 | Environmental Protection Agency | Proposed rule | Jul 30, 2024 |
Clean Air Act Reclassification; Colorado; Reclassification of the Denver Metro/North Front Range 2015 Ozone Nonattainment Area to Serious 2024-16123 | Environmental Protection Agency | Final rule | Jul 24, 2024 |
Air Plan Approval; OR; Permitting Rule Revisions 2024-15748 | Environmental Protection Agency | Final rule | Jul 23, 2024 |
Air Plan Approval; Colorado; 2017 Base Year Inventory and Emission Statement Rule Marginal Nonattainment Requirements, Revisions to Regulation 3 2024-15953 | Environmental Protection Agency | Final rule | Jul 22, 2024 |
Air Plan Approval; New Jersey; NOX SIP Call and Removal of CAIR 2024-15705 | Environmental Protection Agency | Proposed rule | Jul 18, 2024 |
Air Plan Approval; Wisconsin; Nitrogen Oxide Emissions Control Requirements 2024-15598 | Environmental Protection Agency | Proposed rule | Jul 17, 2024 |
Air Plan Approval; GA; Revisions to the State Implementation Plan Gasoline Transport Vehicles and Vapor Collection Systems Rule 2024-15397 | Environmental Protection Agency | Final rule | Jul 16, 2024 |
Air Plan Approval; California; Mojave Desert Air Quality Management District 2024-14786 | Environmental Protection Agency | Proposed rule | Jul 16, 2024 |
Air Plan Approval; Connecticut; Low Emissions Vehicles Program 2024-15225 | Environmental Protection Agency | Final rule | Jul 15, 2024 |
Air Plan Revisions; California; Eastern Kern Air Pollution Control District; Tehama County Air Pollution Control District; San Diego County Air Pollution Control District Emissions Statement Requirements 2024-15045 | Environmental Protection Agency | Proposed rule | Jul 12, 2024 |
Air Plan Approval; New Hampshire; Ambient Air Quality Standards 2024-14990 | Environmental Protection Agency | Proposed rule | Jul 11, 2024 |
Air Plan Approval; Pennsylvania; Adoption of Federal Implementation Plan Reasonably Available Control Technology Requirements for Keystone, Conemaugh, Homer City and Montour Generating Facilities for the 1997 and 2008 Ozone National Ambient Air Quality Standards 2024-15114 | Environmental Protection Agency | Proposed rule | Jul 10, 2024 |