Federal rules on sulfur oxides: 423 since January 2024

Name: Federal rules on sulfur oxides: 423 since January 2024
Creator: SpecStream
License: https://creativecommons.org/licenses/by/4.0/

217 final rules and 206 proposed rules since January 2, 2024, 3 of them marked significant. 4 are open for comment now. Most come from the Environmental Protection Agency (422), National Oceanic and Atmospheric Administration (1).

SpecStream is the live web data engine for teams and agents. It reads every rule and proposed rule in the Federal Register each morning, and this page is that reading. Name your industry once and new rules, comment deadlines and effective dates arrive in your sheet, CRM, Slack or agent as they are published.

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Open for comment

Document	Agency	Type	Comments due
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	Oct 23
Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS 2026-19668	Environmental Protection Agency	Final rule	Oct 26
Air Plan Approval; OR; Lane County Title 36 Rule 2026-20101	Environmental Protection Agency	Proposed rule	Nov 2
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	Nov 18

Every document, newest first

Document	Agency	Type	Published
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
Air Plan Approval; Oklahoma; Interstate Transport Requirements for the 2010 SO2 NAAQS 2026-20640	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; Missouri; Construction Permit Exemptions 2026-20634	Environmental Protection Agency	Final rule	Oct 8
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; North Carolina; Charlotte-Rock Hill Area Maintenance Plan for the 2008 8-Hour Ozone NAAQS 2026-19495	Environmental Protection Agency	Proposed rule	Sep 23
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Maryland; Negative Declaration for Existing Other Solid Waste Incinerators 2026-18750	Environmental Protection Agency	Proposed rule	Sep 14
Air Plan Approvals; Indiana; Prong 4 (Visibility) for the 2015 Ozone National Ambient Air Quality Standard 2026-18334	Environmental Protection Agency	Final rule	Sep 9
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; Oklahoma; Regional Haze Plan for the First Implementation Revision; Revision to State Implementation Plan and Requirements 2026-17499	Environmental Protection Agency	Proposed rule	Aug 27
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Allegheny County; Negative Declaration for Existing Large Municipal Waste Combustors 2026-17497	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; FL; Emissions Reporting Requirements and Permitting Forms 2026-17490	Environmental Protection Agency	Final rule	Aug 27
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; City of Philadelphia; Negative Declarations for Existing Commercial and Industrial Solid Waste Incinerators, Large Municipal Waste Incinerators, Small Municipal Waste Incinerators, and Other Solid Waste Incinerators 2026-17488	Environmental Protection Agency	Proposed rule	Aug 27
Air Plan Approval; SC; Department Name Change 2026-16990	Environmental Protection Agency	Final rule	Aug 20
Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards 2026-16989	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
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; New Hampshire; Repeal of Motor Vehicle Inspection and Maintenance Program 2026-16330	Environmental Protection Agency	Proposed rule	Aug 11
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; 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; 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; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment Area 2026-13843	Environmental Protection Agency	Final rule	Jul 9
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; District of Columbia; Creation of Synthetic Minor Permit Program 2026-12898	Environmental Protection Agency	Final rule	Jun 26
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
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
Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Regional Haze Federal Implementation Plan 2026-11436	Environmental Protection Agency	Proposed rule	Jun 8
Air Plan Approval; Minnesota; Revision to Taconite Federal Implementation Plan 2026-11432	Environmental Protection Agency	Final rule	Jun 8
Clean Air Act Title V Operating Permit Program Revision; District of Columbia 2026-11170	Environmental Protection Agency	Final rule	Jun 4
Partial Approval and Partial Disapproval of Air Quality Implementation Plans; Hawaii; Regional Haze State Implementation Plan for the Second Implementation Period 2026-10754	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; FL; Emissions Reporting Requirements and Permitting Forms 2026-10207	Environmental Protection Agency	Proposed rule	May 21
Air Plan Approval; Montana; Revisions to Western Sugar Stipulation 2026-09619	Environmental Protection Agency	Final rule	May 14
Air Plan Approval; Indiana; Indiana NOX Emissions Monitoring 2026-09612	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
Air Plan Approval; Missouri; Attainment Plan for the New Madrid Nonattainment Area for the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard 2026-09054	Environmental Protection Agency	Proposed rule	May 7
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; 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; Missouri; Construction Permits Required 2026-07884	Environmental Protection Agency	Final rule	Apr 23
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 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 Approvals; Indiana; Prong 4 (Visibility) for the 2015 Ozone National Ambient Air Quality Standard 2026-06942	Environmental Protection Agency	Proposed rule	Apr 10
Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment Area 2026-06941	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
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; Ohio; Muskingum River 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2026-06397	Environmental Protection Agency	Final rule	Apr 2
Air Plan Approval; Michigan; Detroit 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2026-06396	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
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 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; 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; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards 2026-04339	Environmental Protection Agency	Proposed rule	Mar 4
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 Approvals; Illinois; Regional Haze Plan for the Second Implementation Period; Interstate Transport of Air Pollution for the 2012 PM2.5 and 2015 Ozone NAAQS 2026-03936	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
Partial Approval and Partial Disapproval of Air Quality Implementation Plans; Hawaii; Regional Haze State Implementation Plan for the Second Implementation Period 2026-03072	Environmental Protection Agency	Proposed rule	Feb 17
Approval and Promulgation of Air Quality Implementation Plans; Oklahoma; Regional Haze State Implementation Plan for the Second Implementation Period 2026-02843	Environmental Protection Agency	Proposed 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
Approval and Promulgation of Air Quality Implementation Plans; Nevada; Regional Haze State Implementation Plan for the Second Implementation Period 2026-02344	Environmental Protection Agency	Final 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; OR; Lane County Permitting Rule Revisions 2026-01735	Environmental Protection Agency	Final 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; Indiana; Regional Haze Plan for the Second Implementation Period 2026-01406	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
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
Air Plan Approval; Indiana; Huntington County 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2026-00246	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; Kentucky; Emissions Inventory and Nonattainment New Source Review for the Henderson-Webster Sulfur Dioxide Nonattainment Area 2026-00201	Environmental Protection Agency	Final rule	Jan 8
Air Plan Revision; California; Placer County Air Pollution Control District; New Source Review 2026-00006	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
Air Plan Approval; Michigan and Minnesota; Revision to Taconite Federal Implementation Plan 2025-24207	Environmental Protection Agency	Final 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; New Hampshire; Single Source VOC RACT Order for Hutchinson Sealing Systems 2025-22610	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 Approval; South Carolina; Second Planning Period Regional Haze Plan 2025-22565	National Oceanic and Atmospheric Administration	Final rule	Dec 11, 2025
Air Plan Approval; Tennessee; Second Period Regional Haze Plan 2025-22564	Environmental Protection Agency	Final rule	Dec 11, 2025
Air Plan Approval; Ohio; Carmeuse Lime, Inc. SO2 2025-22562	Environmental Protection Agency	Final rule	Dec 11, 2025
Air Plan Approval; Virginia; Amendment to the State Operating Permit for GP Big Island, LLC 2025-22533	Environmental Protection Agency	Proposed 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; 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; 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; Minnesota; Exempt Source SIP Revision 2025-20492	Environmental Protection Agency	Final 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; 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 2025-20444	Environmental Protection Agency	Proposed rule	Nov 20, 2025
Approval and Promulgation of State Air Quality Plans (Negative Declarations) for Designated Facilities and Pollutants; District of Columbia 2025-20419	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; AK; Regional Haze Plan for the Second Implementation Period; Extension of Comment Period 2025-20415	Environmental Protection Agency	Proposed rule	Nov 20, 2025
Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Allegheny County; Delegation of Authority of the Federal Plan for Existing Sewage Sludge Incineration Units 2025-20411	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
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; 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; IA, Muscatine; 2010 1-Hour SO2 Maintenance Plan and Redesignation 2025-20197	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; 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; 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
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
Air Plan Approval; AK; Regional Haze Plan for the Second Implementation Period 2025-19713	Environmental Protection Agency	Proposed rule	Oct 30, 2025
Approval and Promulgation of Air Quality Implementation Plans; Nevada; Regional Haze State Implementation Plan for the Second Implementation Period 2025-19637	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; Ohio; Muskingum River 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2025-19278	Environmental Protection Agency	Proposed rule	Oct 2, 2025
Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Revisions to Regulation for Control of Ozone Season Nitrogen Oxide Emissions 2025-19238	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; GA; Updates to the Cross-State Air Pollution Rule 2025-19226	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; California; San Joaquin Valley 1-Hour Ozone Area; Maintenance Plan and Redesignation Request 2025-18637	Environmental Protection Agency	Final 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
Air Plan Approval; Indiana; Huntington County 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2025-18594	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; Guam; Clean Data Determination for the Piti-Cabras Nonattainment Area for the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard 2025-18067	Environmental Protection Agency	Final rule	Sep 18, 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 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; Michigan; Second Period Regional Haze Plan 2025-17096	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; Kentucky; Emissions Inventory and Nonattainment New Source Review for the Henderson-Webster Sulfur Dioxide Nonattainment Area 2025-17048	Environmental Protection Agency	Proposed rule	Sep 5, 2025
Approval of Air Quality Implementation Plans; California; Regional Haze State Implementation Plan for the Second Implementation Period 2025-17045	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
Withdrawals of Findings of Failure To Submit State Implementation Plan and Finding of Failure To Attain for the Rusk and Panola Counties, Texas 2010 Sulfur Dioxide Primary National Ambient Air Quality Standard Area 2025-17029	Environmental Protection Agency	Final 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; Arkansas; Codification of the State Implementation Plan 2025-16483	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; Texas; Interstate Transport Requirements for the 2010 SO2 NAAQS 2025-16467	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
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; IA, Muscatine; 2010 1-Hour SO2 Maintenance Plan and Redesignation 2025-15983	Environmental Protection Agency	Proposed rule	Aug 21, 2025
Air Plan Approval; Tennessee; Second Planning Period Regional Haze Plan 2025-15748	Environmental Protection Agency	Proposed rule	Aug 19, 2025
Air Plan Approval; North Carolina; Removal of Emissions Exemptions 2025-15557	Environmental Protection Agency	Proposed rule	Aug 15, 2025
Air Plan Approval; GA; Updates to the Cross-State Air Pollution Rule 2025-15461	Environmental Protection Agency	Proposed rule	Aug 14, 2025
Air Plan Approval; North Carolina; Revisions to Regulations for Sulfur Dioxide Emissions From Combustion Sources 2025-15460	Environmental Protection Agency	Proposed rule	Aug 14, 2025
Air Plan Approval; Rhode Island; Decommissioning of Stage II Vapor Recovery Systems 2025-15459	Environmental Protection Agency	Proposed rule	Aug 14, 2025
Air Plan Approval; Michigan; Detroit 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2025-15458	Environmental Protection Agency	Proposed rule	Aug 14, 2025
Finding of Failure To Attain; Air Plan Approval; Indiana; Huntington County Sulfur Dioxide Attainment Plan 2025-15455	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; Ohio; Carmeuse Lime, Inc. SO2 2025-14989	Environmental Protection Agency	Proposed rule	Aug 7, 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; OR; Update to Materials Incorporated by Reference 2025-14971	Environmental Protection Agency	Final rule	Aug 7, 2025
Air Plan Approval; IA; Regional Haze State Implementation Plan for the Second Implementation Period 2025-14850	Environmental Protection Agency	Final rule	Aug 5, 2025
Air Plan Approval; South Carolina; Second Planning Period Regional Haze Plan 2025-14476	Environmental Protection Agency	Proposed 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
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; 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 Approval; Ohio; Second Maintenance Plan for the Ohio Portion of the Campbell-Clermont, KY-OH SO2 Maintenance Area 2025-13344	Environmental Protection Agency	Final rule	Jul 16, 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; Guam; Base Year Emissions Inventory for the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard for the Piti-Cabras Nonattainment Area 2025-13328	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; Louisiana; Nonattainment Plan for the Evangeline Parish 2010 Sulfur Dioxide Primary National Ambient Air Quality Standard Nonattainment Area 2025-12801	Environmental Protection Agency	Final 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; Ohio; Regional Haze Plan for the Second Implementation Period 2025-12526	Environmental Protection Agency	Final rule	Jul 8, 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; Louisiana; Interstate Transport Requirements for the 2010 SO2 NAAQS 2025-12533	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; 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
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
Air Plan Approval; Guam; Clean Data Determination for the Piti-Cabras Nonattainment Area for the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard 2025-11326	Environmental Protection Agency	Proposed rule	Jun 20, 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; Extension of Comment Period 2025-11272	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
Finding of Failure To Attain; Air Plan Approval; Indiana; Huntington County Sulfur Dioxide Attainment Plan 2025-11268	Environmental Protection Agency	Proposed rule	Jun 18, 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
Approval of Air Quality Implementation Plans; California; Regional Haze State Implementation Plan for the Second Implementation Period 2025-11261	Environmental Protection Agency	Proposed rule	Jun 18, 2025
Air Plan Approval; Indiana; Regional Haze Plan for the Second Implementation Period 2025-11259	Environmental Protection Agency	Proposed rule	Jun 18, 2025
Air Plan Approval; Michigan; Second Period Regional Haze Plan 2025-11257	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
Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Revisions to Regulation for Control of Ozone Season Nitrogen Oxide Emissions 2025-10547	Environmental Protection Agency	Proposed 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
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; Oregon; Lane Regional Air Protection Agency, Outdoor Burning 2025-09324	Environmental Protection Agency	Proposed rule	May 23, 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 2025-09293	Environmental Protection Agency	Proposed rule	May 23, 2025
Air Plan Approval; Vermont; Regional Haze State Implementation Plan for the Second Implementation Period 2025-09274	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; Michigan; Attainment Plan for the Detroit 2010 Sulfur Dioxide Nonattainment Area 2025-08727	Environmental Protection Agency	Final 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 Plan Approval; Louisiana; Nonattainment Plan for the Evangeline Parish 2010 Sulfur Dioxide Primary National Ambient Air Quality Standard Nonattainment Area 2025-08080	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; Indiana; Indiana NOX Emissions Monitoring 2025-06617	Environmental Protection Agency	Proposed rule	Apr 21, 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; Washington; Spokane Regional Clean Air Agency, General Air Quality Regulations 2025-06247	Environmental Protection Agency	Final rule	Apr 16, 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
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; 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 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
Air Plan Approval; SC; Updates to the Cross-State Air Pollution Rule 2025-03609	Environmental Protection Agency	Final rule	Mar 7, 2025
Air Plan Approval; Alabama; Administrative Corrections and VOC Definition 2025-03608	Environmental Protection Agency	Proposed rule	Mar 7, 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
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
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; Kansas; Annual Emission Inventory and Fees 2024-31626	Environmental Protection Agency	Proposed rule	Jan 15, 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; Illinois; Alton Township 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2024-30506	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
Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter 2024-29463 · significant	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 Approval; Georgia; Update to Materials Incorporated by Reference 2024-30253	Environmental Protection Agency	Final rule	Dec 20, 2024
Partial Approval and Partial Disapproval of Air Quality Implementation Plans; California; Regional Haze State Implementation Plan for the Second Implementation Period 2024-29595	Environmental Protection Agency	Proposed 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
Finding of Failure To Attain the Primary 2010 One-Hour Sulfur Dioxide Standard; Texas; Rusk and Panola Counties Nonattainment Area 2024-29482	Environmental Protection Agency	Final 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
Finding of Failure To Attain by the Attainment Date for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard; Louisiana; Evangeline Parish Nonattainment Area 2024-29438	Environmental Protection Agency	Final rule	Dec 16, 2024
Determination of Attainment by the Attainment Date for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard; Texas; Freestone-Anderson and Titus Counties 2024-29436	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; SC; Updates to the Cross-State Air Pollution Rule 2024-28873	Environmental Protection Agency	Proposed rule	Dec 10, 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
Air Plan Approval; Maryland; Determination of Attainment by the Attainment Date for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2024-27865	Environmental Protection Agency	Final rule	Dec 6, 2024
Air Plan Approval; ID; Revisions to Air Quality Regulations 2024-28364	Environmental Protection Agency	Final rule	Dec 5, 2024
Air Plan Approval; Michigan and Minnesota; Revision to Taconite Federal Implementation Plan 2024-27635	Environmental Protection Agency	Proposed 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
Guideline on Air Quality Models; Enhancements to the AERMOD Dispersion Modeling System 2024-27636	Environmental Protection Agency	Final rule	Nov 29, 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
Air Plan Partial Approval and Partial Disapproval; North Carolina; Second Period Regional Haze Plan 2024-26980	Environmental Protection Agency	Final rule	Nov 22, 2024
Air Plan Approval; Georgia; Second Period Regional Haze Plan 2024-26977	Environmental Protection Agency	Final 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; Wisconsin; Second Period Regional Haze Plan 2024-26833	Environmental Protection Agency	Final rule	Nov 19, 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
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 Quality State Implementation Plans; Partial Approval, Partial Disapproval and Promulgation; Texas; Regional Haze; Extension of Comment Period 2024-25452	Environmental Protection Agency	Proposed rule	Nov 1, 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
Air Plan Approval; Mississippi; PSD and Air Quality Modeling Infrastructure Requirements for the 2015 8-Hour Ozone National Ambient Air Quality Standards 2024-25243	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
Outer Continental Shelf Air Regulations Update To Include New Jersey State Requirements 2024-25141	Environmental Protection Agency	Final rule	Oct 30, 2024
Air Plan Approval; Wisconsin; SIP Alignment Revision 2024-25032	Environmental Protection Agency	Final rule	Oct 29, 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 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 Quality State Implementation Plans; Partial Approval, Partial Disapproval and Promulgation; Texas; Regional Haze 2024-23341	Environmental Protection Agency	Proposed rule	Oct 15, 2024
Air Plan Approval; Texas; New Source Review Updates for Project Emissions Accounting 2024-23282	Environmental Protection Agency	Proposed rule	Oct 11, 2024
Air Plan Approval; Illinois; Alton Township 2010 Sulfur Dioxide Redesignation and Maintenance Plan 2024-23164	Environmental Protection Agency	Proposed rule	Oct 8, 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; Greif Packaging LLC 2024-23141	Environmental Protection Agency	Final 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; Michigan; Attainment Plan for the Detroit 2010 Sulfur Dioxide Nonattainment Area 2024-21896	Environmental Protection Agency	Proposed rule	Oct 3, 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; 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
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; Mississippi; PSD and Air Quality Modeling Infrastructure Requirements for the 2015 8-Hour Ozone National Ambient Air Quality Standards 2024-21007	Environmental Protection Agency	Proposed rule	Sep 16, 2024
Air Plan Approval; Indiana; Sulfur Dioxide 2024-20856	Environmental Protection Agency	Final rule	Sep 16, 2024
Air Plan Approval; New Hampshire; Ambient Air Quality Standards 2024-20721	Environmental Protection Agency	Final rule	Sep 13, 2024
Air Plan Approval; Pennsylvania; Attainment Plan for the Indiana Nonattainment Area for the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard 2024-20598	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; Maryland; Determination of Attainment by the Attainment Date for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2024-19436	Environmental Protection Agency	Proposed rule	Sep 6, 2024
Finding of Failure to Attain by the Attainment Date for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard; Louisiana; Evangeline Parish Nonattainment Area 2024-19616	Environmental Protection Agency	Proposed rule	Sep 4, 2024
Determination of Attainment by the Attainment Date for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard; Texas; Freestone-Anderson and Titus Counties 2024-19599	Environmental Protection Agency	Proposed rule	Sep 3, 2024
Air Plan Limited Approval and Limited Disapproval; Texas; Attainment Plan for the Rusk and Panola Counties 2010 Sulfur Dioxide Primary National Ambient Air Quality Standard Nonattainment Area; Finding of Failure To Attain the Primary 2010 One-Hour Sulfur Dioxide Standard for Rusk and Panola Counties; Extension of Comment Period 2024-19596	Environmental Protection Agency	Proposed rule	Aug 30, 2024
Air Plan Approval; Ohio; Regional Haze Plan for the Second Implementation Period 2024-19189	Environmental Protection Agency	Proposed rule	Aug 30, 2024
Approval and Promulgation of Air Quality Implementation Plans; Texas; Federal Implementation Plan for the Rusk-Panola Sulfur Dioxide Nonattainment Area 2024-18779	Environmental Protection Agency	Proposed rule	Aug 26, 2024
Air Plan Approval; North Carolina; Second Period Regional Haze Plan 2024-18495	Environmental Protection Agency	Proposed rule	Aug 20, 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
Approval and Promulgation of Air Quality Implementation Plans; Delaware; Regional Haze State Implementation Plan for the Second Implementation Period 2024-18174	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; 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; Update to CFR References 2024-17913	Environmental Protection Agency	Proposed rule	Aug 16, 2024
Findings of Failure To Submit State Implementation Plan Revisions for Nonattainment Areas for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard 2024-17328	Environmental Protection Agency	Final rule	Aug 16, 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; 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
Air Plan Approval; Wisconsin; Second Period Regional Haze Plan 2024-17279	Environmental Protection Agency	Proposed 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 Approval; Colorado; Interim Final Determination To Stay and Defer Sanctions in the Denver Metro/North Front Range 2008 Ozone Nonattainment Area 2024-17087	Environmental Protection Agency	Final rule	Aug 6, 2024
Air Plan Limited Approval and Limited Disapproval; Texas; Attainment Plan for the Rusk and Panola Counties 2010 Sulfur Dioxide Primary National Ambient Air Quality Standard Nonattainment Area; Finding of Failure To Attain the Primary 2010 One-Hour Sulfur Dioxide Standard for Rusk and Panola Counties 2024-17053	Environmental Protection Agency	Proposed rule	Aug 2, 2024
Air Plan Approval; IA; Regional Haze State Implementation Plan for the Second Implementation Period 2024-16502	Environmental Protection Agency	Proposed rule	Aug 2, 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
Disapproval and Promulgation of Air Quality Implementation Plan; Nebraska; Regional Haze State Implementation Plan; Federal Implementation Plan for Regional Haze; Completion of Remand 2024-16697	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; Virginia; Revision Listing and Implementing the 2010 Primary Sulfur Dioxide National Ambient Air Quality Standard for the Giles County Nonattainment Area 2024-16121	Environmental Protection Agency	Final rule	Jul 23, 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
Approval and Promulgation of Air Quality Implementation Plans; Connecticut; Regional Haze State Implementation Plan for the Second Implementation Period 2024-15857	Environmental Protection Agency	Proposed rule	Jul 19, 2024
Air Plan Approval; Ohio; Greif Packaging LLC 2024-15572	Environmental Protection Agency	Proposed rule	Jul 17, 2024
Air Plan Approval; FL; General Provisions Repeals and Amendments 2024-15416	Environmental Protection Agency	Final rule	Jul 16, 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
Outer Continental Shelf Air Regulations Update To Include New Jersey State Requirements 2024-15327	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 Approval; New Hampshire; Ambient Air Quality Standards 2024-14990	Environmental Protection Agency	Proposed rule	Jul 11, 2024
Air Plan Approval; Minnesota; Second Period Regional Haze Plan 2024-14851	Environmental Protection Agency	Proposed rule	Jul 11, 2024
Air Plan Partial Approval and Partial Disapproval; North Dakota; Regional Haze State Implementation Plan for the Second Implementation Period 2024-14761	Environmental Protection Agency	Proposed rule	Jul 10, 2024
Clean Air Plans; 1997 Fine Particulate Matter Nonattainment Area Requirements; San Joaquin Valley, California 2024-14677	Environmental Protection Agency	Proposed rule	Jul 8, 2024
Approval and Promulgation of Air Quality Implementation Plans; Massachusetts; Regional Haze State Implementation Plan for the Second Implementation Period 2024-14632	Environmental Protection Agency	Final rule	Jul 8, 2024
Air Plan Approval; Connecticut; Source Monitoring, Record Keeping and Reporting 2024-14620	Environmental Protection Agency	Final rule	Jul 8, 2024
Air Plan Partial Approval and Partial Disapproval; Missouri; Regional Haze 2024-14612	Environmental Protection Agency	Proposed rule	Jul 3, 2024
Air Plan Approval; State of Utah; Utah State Implementation Plan Revisions 2024-14136	Environmental Protection Agency	Final rule	Jul 1, 2024
Air Plan Approval; Iowa; Linn County Ordinances 2024-14119	Environmental Protection Agency	Final rule	Jul 1, 2024
Air Plan Approval; Indiana; Sulfur Dioxide 2024-13601	Environmental Protection Agency	Proposed rule	Jun 24, 2024
Air Plan Approval; ID; Revisions to Air Quality Regulations 2024-13587	Environmental Protection Agency	Proposed rule	Jun 24, 2024
Air Plan Approval; North Carolina; Revision to Approved Motor Vehicle Emissions Budgets 2024-12805	Environmental Protection Agency	Final rule	Jun 13, 2024
Air Plan Approval; Pennsylvania; Attainment Plan for the Indiana Nonattainment Area for the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard 2024-11175	Environmental Protection Agency	Proposed rule	Jun 7, 2024
Air Plan Approval; KY; Updates to Attainment Status Designations 2024-12028	Environmental Protection Agency	Final rule	Jun 3, 2024
Air Plan Approval; Georgia; Second Period Regional Haze Plan 2024-12025	Environmental Protection Agency	Proposed rule	Jun 3, 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 2024-11807	Environmental Protection Agency	Proposed rule	May 31, 2024
Air Plan Approval; GA; Revisions to the State Implementation Plan Gasoline Transport Vehicles and Vapor Collection System Rule 2024-10713	Environmental Protection Agency	Proposed rule	May 17, 2024
Air Plan Approval; Wisconsin; SIP Alignment Revision 2024-10539	Environmental Protection Agency	Proposed rule	May 16, 2024
Air Plan Approval; Delaware; Amendments to Delaware's Requirements for Public Notice of Certain Permits 2024-09924	Environmental Protection Agency	Final rule	May 16, 2024
Air Plan Approval; FL; General Provisions Repeals and Amendments 2024-09734	Environmental Protection Agency	Proposed rule	May 15, 2024
Air Plan Approval; KY; Revisions to Jefferson County Definitions 2024-09730	Environmental Protection Agency	Final rule	May 13, 2024
Air Quality Plans; California; San Diego County Air Pollution Control District; Permit Program 2024-09248	Environmental Protection Agency	Proposed rule	Apr 30, 2024
Air Plan Approval; New Hampshire; Amendments to Motor Vehicle Inspection and Maintenance Program Regulation 2024-08928	Environmental Protection Agency	Final rule	Apr 29, 2024
South Carolina; Approval of State Plan for Control of Emissions From Commercial and Industrial Solid Waste Incineration Units 2024-08930	Environmental Protection Agency	Proposed rule	Apr 26, 2024
Air Plan Approval; Michigan; Revisions to Part 1 and 2 Rules 2024-08798	Environmental Protection Agency	Proposed rule	Apr 25, 2024
Air Plan Approval; IA; Linn County Ordinances 2024-08283	Environmental Protection Agency	Proposed rule	Apr 18, 2024
Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter 2024-07397 · significant	Environmental Protection Agency	Proposed rule	Apr 15, 2024
Air Plan Approval; Georgia; Gasoline Dispensing Facilities 2024-07703	Environmental Protection Agency	Proposed rule	Apr 12, 2024
Air Plan Approval; KY; Updates to Attainment Status Designations 2024-07702	Environmental Protection Agency	Proposed rule	Apr 11, 2024
Air Plan Approval; Colorado; 2017 Base Year Inventory and Emission Statement Rule Marginal Nonattainment Requirements, Revisions to Regulation 3 2024-07584	Environmental Protection Agency	Proposed rule	Apr 10, 2024
Air Plan Approval; Wyoming; Revisions to Regional Haze State Implementation Plan 2024-07414	Environmental Protection Agency	Proposed rule	Apr 10, 2024
Air Plan Approval; OR; Permitting Rule Revisions 2024-06807	Environmental Protection Agency	Proposed rule	Apr 1, 2024
Approval and Promulgation of Air Quality Implementation Plan; Maryland; Regional Haze State Implementation Plan for the Second Implementation Period 2024-06415	Environmental Protection Agency	Final rule	Apr 1, 2024
Air Plan Approval; Revisions to the Florida State Implementation Plan Conformity Rule 2024-06394	Environmental Protection Agency	Final rule	Mar 28, 2024
Approval and Promulgation of Air Quality Implementation Plans; New York; Regional Haze State Implementation Plan for the Second Implementation Period 2024-06105	Environmental Protection Agency	Proposed rule	Mar 22, 2024
Clean Air Act Title V Operating Permit Program Revision; West Virginia 2024-05894	Environmental Protection Agency	Proposed rule	Mar 21, 2024
Air Plan Approval; OR; Regional Haze Plan for the Second Implementation Period; Extension of the Comment Period 2024-05510	Environmental Protection Agency	Proposed rule	Mar 15, 2024
South Carolina; Approval and Promulgation of State Plans for Designated Facilities and Pollutants; Control of Emissions From Existing Municipal Solid Waste Landfills 2024-04942	Environmental Protection Agency	Final rule	Mar 12, 2024
Air Plan Approval; New Hampshire; Single Source Order for PAK Solutions 2024-05072	Environmental Protection Agency	Final rule	Mar 11, 2024
Air Plan Approval; KY; 2015 8-Hour Ozone Nonattainment New Source Review Permit Program Requirements and Rule Revision for Jefferson County 2024-04782	Environmental Protection Agency	Final rule	Mar 7, 2024
Air Plan Approval; KY; Revisions to Jefferson County Definitions 2024-04773	Environmental Protection Agency	Proposed rule	Mar 7, 2024
Reconsideration of the National Ambient Air Quality Standards for Particulate Matter 2024-02637	Environmental Protection Agency	Final rule	Mar 6, 2024
Air Plan Approval; Delaware; Amendments to Delaware's Requirements for Public Notice of Certain Permits 2024-04366	Environmental Protection Agency	Proposed rule	Mar 1, 2024
Air Plan Approval; Oklahoma; Updates to the State Implementation Plan Incorporation by Reference Provisions 2024-04103	Environmental Protection Agency	Final rule	Mar 1, 2024
Air Plan Approval; Connecticut; Source Monitoring, Record Keeping and Reporting 2024-04133	Environmental Protection Agency	Proposed rule	Feb 29, 2024
Air Plan Approval; OR; Regional Haze Plan for the Second Implementation Period 2024-03529	Environmental Protection Agency	Proposed rule	Feb 23, 2024
Air Plan Approval; Ohio; Withdrawal of Technical Amendment 2024-03555	Environmental Protection Agency	Proposed rule	Feb 22, 2024
Air Plan Approval and Operating Permit Program Approval; Connecticut; Revision to Definitions 2024-02700	Environmental Protection Agency	Final rule	Feb 12, 2024
Air Plan Approval; Georgia; Vehicle Inspection and Maintenance Program 2024-02521	Environmental Protection Agency	Final rule	Feb 9, 2024
Air Plan Approval; GA; Miscellaneous Rule Revision 2024-02321	Environmental Protection Agency	Final rule	Feb 6, 2024
Air Plan Approval; Alabama; Birmingham Limited Maintenance Plan for the 2006 24-Hour PM2.5 NAAQS 2024-02078	Environmental Protection Agency	Final rule	Feb 2, 2024
Air Plan Approval; Florida; Revisions to the State Implementation Plan Conformity Rule 2024-01670	Environmental Protection Agency	Proposed rule	Feb 1, 2024
Air Plan Approval; New Hampshire; Amendments to Motor Vehicle Inspection and Maintenance Program Regulation 2024-01937	Environmental Protection Agency	Proposed rule	Jan 31, 2024
Air Plan Approval; KY; 2015 8-Hour Ozone Nonattainment New Source Review Permit Program Requirements and Rule Revision for Jefferson County 2024-01029	Environmental Protection Agency	Proposed rule	Jan 19, 2024
Air Plan Approval; Illinois; NAAQS Update 2024-00658	Environmental Protection Agency	Final rule	Jan 17, 2024
Approval and Promulgation of Air Quality Implementation Plans; Massachusetts; Regional Haze State Implementation Plan for the Second Implementation Period 2023-28573	Environmental Protection Agency	Proposed rule	Jan 10, 2024
Outer Continental Shelf Air Regulations; Consistency Update for Maryland 2023-28839	Environmental Protection Agency	Final rule	Jan 4, 2024
Air Plan Disapproval; Kansas; Regional Haze 2023-28384	Environmental Protection Agency	Proposed rule	Jan 2, 2024

Federal rules on sulfur oxides: 423 since January 2024

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