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Data / Federal rules / Air pollution control

Federal rules on air pollution control: 1,044 since January 2024

560 final rules and 484 proposed rules since January 2, 2024, 43 of them marked significant. 12 are open for comment now. Most come from the Environmental Protection Agency (1035), Ocean Energy Management Bureau (3), Agriculture Department (2), Federal Aviation Administration (2).

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.

Open for comment

DocumentAgencyTypeComments due
Air Plan Approval; North Carolina; Charlotte-Rock Hill Area Maintenance Plan for the 2008 8-Hour Ozone NAAQS
2026-19495
Environmental Protection AgencyProposed ruleOct 23
Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS
2026-19668
Environmental Protection AgencyFinal ruleOct 26
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 AgencyProposed ruleNov 2
Air Plan Approval; OR; Lane County Title 36 Rule
2026-20101
Environmental Protection AgencyProposed ruleNov 2
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; West Virginia; Negative Declarations for Existing Large Municipal Waste Combustors and Other Solid Waste Incinerators
2026-20611
Environmental Protection AgencyProposed ruleNov 6
Air Quality Plan; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits-Rule 204
2026-20612
Environmental Protection AgencyProposed ruleNov 9
National Emission Standards for Hazardous Air Pollutants for Gasoline Distribution Facilities and Standards of Performance for Bulk Gasoline Terminals Reconsideration
2026-19774
Environmental Protection AgencyProposed ruleNov 12
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 AgencyProposed ruleNov 18
Air Quality Plan; Arizona; Agricultural Best Management Practices Rules for the West Pinal County PM10 Nonattainment Area
2026-21289
Environmental Protection AgencyProposed ruleNov 18
Approval and Promulgation of Implementation Plans-Pinal County (Part); West Pinal, AZ PM10 Nonattainment Area; Moderate Area, Serious Area, and Section 189(d) Plan for Attainment of the 24-Hour PM10 Standard
2026-21288
Environmental Protection AgencyProposed ruleNov 18
Air Quality Plan; Arizona; Pinal County Air Quality Control District; West Pinal County PM10 Nonattainment Area; Fugitive Dust Rules
2026-21287
Environmental Protection AgencyProposed ruleNov 18
Renewable Fuel Standard (RFS) Program: Reallocation of Additional 2025 Small Refinery Exemptions
2026-21155
Environmental Protection AgencyProposed ruleDec 4

The 500 newest documents

DocumentAgencyTypePublished
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 AgencyProposed ruleOct 19
Air Quality Plan; Arizona; Agricultural Best Management Practices Rules for the West Pinal County PM10 Nonattainment Area
2026-21289
Environmental Protection AgencyProposed ruleOct 19
Approval and Promulgation of Implementation Plans-Pinal County (Part); West Pinal, AZ PM10 Nonattainment Area; Moderate Area, Serious Area, and Section 189(d) Plan for Attainment of the 24-Hour PM10 Standard
2026-21288
Environmental Protection AgencyProposed ruleOct 19
Air Quality Plan; Arizona; Pinal County Air Quality Control District; West Pinal County PM10 Nonattainment Area; Fugitive Dust Rules
2026-21287
Environmental Protection AgencyProposed ruleOct 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 AgencyFinal ruleOct 19
Renewable Fuel Standard (RFS) Program: Reallocation of Additional 2025 Small Refinery Exemptions
2026-21155
Environmental Protection AgencyProposed ruleOct 16
Air Plan Approval; Michigan; Clean Data Determination for the Berrien, MI and Muskegon, MI Areas for the 2015 Ozone Standards
2026-20736
Environmental Protection AgencyFinal ruleOct 9
Air Plan Approval; Kentucky; Louisville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS
2026-20641
Environmental Protection AgencyFinal ruleOct 8
Air Plan Approval; Oklahoma; Interstate Transport Requirements for the 2010 SO2 NAAQS
2026-20640
Environmental Protection AgencyFinal ruleOct 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 AgencyFinal ruleOct 8
Air Plan Approval; GA; Removal of Nonattainment Area New Source Review
2026-20636
Environmental Protection AgencyFinal ruleOct 8
Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors
2026-20635
Environmental Protection AgencyFinal ruleOct 8
Air Plan Approval; Missouri; Construction Permit Exemptions
2026-20634
Environmental Protection AgencyFinal ruleOct 8
Air Quality Plan; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits-Rule 204
2026-20612
Environmental Protection AgencyProposed ruleOct 8
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; West Virginia; Negative Declarations for Existing Large Municipal Waste Combustors and Other Solid Waste Incinerators
2026-20611
Environmental Protection AgencyProposed ruleOct 7
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 AgencyProposed ruleOct 1
Air Plan Approval; OR; Lane County Title 36 Rule
2026-20101
Environmental Protection AgencyProposed ruleOct 1
Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area
2026-20097
Environmental Protection AgencyFinal ruleOct 1
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
2026-20096
Environmental Protection AgencyFinal ruleOct 1
Rescission of Title V Emergency Affirmative Defense Rule; Corrections
2026-19889
Environmental Protection AgencyFinal ruleSep 29
National Emission Standards for Hazardous Air Pollutants for Gasoline Distribution Facilities and Standards of Performance for Bulk Gasoline Terminals Reconsideration
2026-19774
Environmental Protection AgencyProposed ruleSep 28
Clarifying the Scope of “Applicable Requirements” Under State Operating Permit Programs and the Federal Operating Permit Program
2026-19671
Environmental Protection AgencyFinal ruleSep 25
Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS
2026-19668
Environmental Protection AgencyFinal ruleSep 25
Air Plan Approval; Alabama; Transportation Conformity
2026-19566
Environmental Protection AgencyFinal ruleSep 24
Air Plan Approval; North Carolina; Charlotte-Rock Hill Area Maintenance Plan for the 2008 8-Hour Ozone NAAQS
2026-19495
Environmental Protection AgencyProposed ruleSep 23
Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units
2026-19071 · significant
Environmental Protection AgencyFinal ruleSep 17
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; District of Columbia; Negative Declaration for Existing Other Solid Waste Incinerators
2026-18759
Environmental Protection AgencyProposed ruleSep 14
Clean Data Determination; 1997 8-Hour Ozone Standards; California; Sacramento Metro Area
2026-18755
Environmental Protection AgencyProposed ruleSep 14
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 AgencyProposed ruleSep 14
Approval and Promulgation of Implementation Plans; California; San Joaquin Valley, Revisions to Motor Vehicle Emissions Budgets for Ozone
2026-18748
Environmental Protection AgencyFinal ruleSep 14
Air Plan Approvals; Indiana; Prong 4 (Visibility) for the 2015 Ozone National Ambient Air Quality Standard
2026-18334
Environmental Protection AgencyFinal ruleSep 9
Air Plan Approval; New York; Interstate Transport Requirements for the 2010 SO2 NAAQS
2026-18324
Environmental Protection AgencyFinal ruleSep 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 AgencyProposed ruleSep 9
Renewable Fuel Standard (RFS) Program: Extension of 2025 Compliance Reporting Deadline
2026-18132
Environmental Protection AgencyFinal ruleSep 4
Air Plan Approval; Mississippi; 2010 1-Hour SO2 NAAQS Transport Infrastructure
2026-17503
Environmental Protection AgencyProposed ruleAug 27
Air Plan Approval; Kentucky; Cincinnati-Hamilton Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS
2026-17502
Environmental Protection AgencyProposed ruleAug 27
Air Plan Approval; Kentucky; Louisville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS
2026-17501
Environmental Protection AgencyProposed ruleAug 27
Air Plan Approval; Oklahoma; Regional Haze Plan for the First Implementation Revision; Revision to State Implementation Plan and Requirements
2026-17499
Environmental Protection AgencyProposed ruleAug 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 AgencyProposed ruleAug 27
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Puerto Rico; Negative Declaration for the Oil and Gas Industry
2026-17495
Environmental Protection AgencyProposed ruleAug 27
Air Plan Approval; Arkansas; Regional Haze State Implementation Plan for the Second Implementation Period
2026-17494
Environmental Protection AgencyFinal ruleAug 27
Air Plan Approval; FL; Emissions Reporting Requirements and Permitting Forms
2026-17490
Environmental Protection AgencyFinal ruleAug 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 AgencyProposed ruleAug 27
Air Plan Approval; Michigan; 2015 Ozone Moderate Reasonably Available Control Technology
2026-17486
Environmental Protection AgencyFinal ruleAug 27
Proposed Deletion From the National Priorities List
2026-16994
Environmental Protection AgencyProposed ruleAug 20
Air Plan Approval; SC; Department Name Change
2026-16990
Environmental Protection AgencyFinal ruleAug 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 AgencyFinal ruleAug 20
Deletion From the National Priorities List
2026-16988
Environmental Protection AgencyFinal ruleAug 20
Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas
2026-16986
Environmental Protection AgencyFinal ruleAug 20
Air Plan Approval; South Carolina; Minor Source Permit Program Revisions
2026-16937
Environmental Protection AgencyProposed ruleAug 19
Air Plan Partial Approval and Partial Conditional Approval; South Carolina; Control of Oxides of Nitrogen and Source Testing Requirements
2026-16932
Environmental Protection AgencyProposed ruleAug 19
Air Plan Approval; South Carolina; Minor Source Permit Program Revisions
2026-16930
Environmental Protection AgencyProposed ruleAug 19
Approval of Source-Specific Air Quality Implementation Plan; New York; Big Six Towers Inc.
2026-16627
Environmental Protection AgencyFinal ruleAug 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 AgencyProposed ruleAug 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 AgencyProposed ruleAug 14
Air Plan Approval; Iowa; Interstate Transport Requirements for the 2010 Sulfur Dioxide Standard
2026-16570
Environmental Protection AgencyProposed ruleAug 14
Air Plan Approval; Commonwealth of Virginia; Transfer of Authority and Requests for Certain Public Hearings on Air Permits
2026-16564
Environmental Protection AgencyProposed ruleAug 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 AgencyFinal ruleAug 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 AgencyFinal ruleAug 13
Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley
2026-16511
Environmental Protection AgencyFinal ruleAug 13
Determination of Attainment by the Attainment Date and Clean Data Determination for the 2012 Annual Fine Particulate Standard; Plumas County, California
2026-16510
Environmental Protection AgencyFinal ruleAug 13
Air Quality Plan; Arizona; Maricopa County Air Quality Department; Gasoline Loading
2026-16335
Environmental Protection AgencyProposed ruleAug 11
Determination To Defer Sanctions; Arizona; Maricopa County Air Quality Department; Gasoline Loading
2026-16334
Environmental Protection AgencyFinal ruleAug 11
Response to Clean Air Act Section 176A Petition From New Hampshire
2026-16331
Environmental Protection AgencyProposed ruleAug 11
Air Plan Approval; New Hampshire; Repeal of Motor Vehicle Inspection and Maintenance Program
2026-16330
Environmental Protection AgencyProposed ruleAug 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 AgencyProposed ruleAug 6
Air Plan Approval; Illinois; 2015 Ozone Moderate and Serious Reasonably Available Control Technology Update
2026-16001
Environmental Protection AgencyProposed ruleAug 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 AgencyFinal ruleAug 6
Air Plan Approval; Rhode Island; Update to Materials Incorporated by Reference
2026-15493
Environmental Protection AgencyFinal ruleJul 31
Air Plan Approval; California; San Joaquin Valley Air Pollution Control District
2026-15377
Environmental Protection AgencyFinal ruleJul 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 AgencyProposed ruleJul 30
Air Plan Approval; Missouri; Construction Permit Exemptions
2026-15371
Environmental Protection AgencyProposed ruleJul 30
Operating Permit Program Approval; New Hampshire; Revised Definitions
2026-15363
Environmental Protection AgencyFinal ruleJul 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 AgencyProposed ruleJul 30
Air Plan Approval; Michigan; Redesignation of the Detroit, MI Area to Attainment of the 2015 Ozone Standards
2026-15168
Environmental Protection AgencyProposed ruleJul 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 AgencyProposed ruleJul 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 AgencyProposed ruleJul 23
Air Plan Approval; Pennsylvania; Harrisburg-Lebanon-Carlisle-York Maintenance Area, Second 10-Year Maintenance Plan for the 2006 Fine Particulate Matter National Ambient Air Quality Standard
2026-14902
Environmental Protection AgencyProposed ruleJul 23
Air Plan Approval; Pennsylvania; Revision to Source-Specific Reasonably Available Control Technology (RACT) Requirements
2026-14891
Environmental Protection AgencyProposed ruleJul 23
Air Plan Approval; Maine; Chapter 140: Part 70 Air Emission License Regulation
2026-14885
Environmental Protection AgencyFinal ruleJul 23
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer
2026-14880
Environmental Protection AgencyFinal ruleJul 23
New Source Performance Standards Review for Stationary Combustion Turbines and Stationary Gas Turbines; Correction
2026-14371
Environmental Protection AgencyFinal ruleJul 16
Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants; Nebraska; Commercial and Industrial Solid Waste Incineration Units
2026-14330
Environmental Protection AgencyFinal ruleJul 16
Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants; Nebraska; Commercial and Industrial Solid Waste Incineration Units
2026-14329
Environmental Protection AgencyProposed ruleJul 16
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 AgencyFinal ruleJul 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 AgencyProposed ruleJul 16
Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations
2026-14322
Environmental Protection AgencyFinal ruleJul 16
Air Plan Approval and Air Quality Designation; Ohio; Attainment Plan and Redesignation of the Canton Area to Attainment of the 2008 Lead Standard
2026-14318
Environmental Protection AgencyFinal ruleJul 16
Air Plan Revisions; California; Antelope Valley Air Quality Management District; New Source Review; Stationary Source Permits
2026-14317
Environmental Protection AgencyFinal ruleJul 16
Air Plan Approval; Wisconsin; Source-Specific Air Quality Implementation Plan; Oak Creek Power Plant
2026-14282
Environmental Protection AgencyProposed ruleJul 15
Approval of Source-Specific Air Quality Implementation Plan; New York; Castleton Power, LLC
2026-14261
Environmental Protection AgencyProposed ruleJul 15
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
2026-14260
Environmental Protection AgencyProposed ruleJul 15
Amendments and Nonconformance Penalties for Model Year 2027 and Later Heavy-Duty Highway Engines and Amendments to Inducement Provisions for SCR-Equipped Diesel Engines
2026-14112
Environmental Protection AgencyProposed ruleJul 14
Approval and Promulgation of Implementation Plans; California; San Joaquin Valley; Revisions to Motor Vehicle Emissions Budgets for Ozone
2026-13845
Environmental Protection AgencyProposed ruleJul 9
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 AgencyFinal ruleJul 9
Minor New Source Review Program Air Permitting Public Participation Requirements for State Implementation Plans
2026-13667 · significant
Environmental Protection AgencyProposed ruleJul 7
National Emission Standards for Hazardous Air Pollutants: Plywood and Composite Wood Products
2026-13550
Environmental Protection AgencyFinal ruleJul 6
Air Plan Approval; Alabama; Transportation Conformity
2026-13403
Environmental Protection AgencyProposed ruleJul 2
Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP Provisions
2026-13398
Environmental Protection AgencyFinal ruleJul 2
Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment Area
2026-13396
Environmental Protection AgencyFinal ruleJul 2
Air Plan Approval; Ohio; Redesignation of the Cleveland, OH Area to Attainment of the 2015 Ozone Standard
2026-13027
Environmental Protection AgencyFinal ruleJun 29
Air Quality Plan; California; Mojave Desert Air Quality Management District; Rescissions of Outdated Requirements Within Riverside County
2026-12935
Environmental Protection AgencyProposed ruleJun 26
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT and SIP Strengthening for Ohio
2026-12921
Environmental Protection AgencyFinal ruleJun 26
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT
2026-12920
Environmental Protection AgencyFinal ruleJun 26
Air Plan Approval; District of Columbia; Creation of Synthetic Minor Permit Program
2026-12898
Environmental Protection AgencyFinal ruleJun 26
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Oklahoma; Control of Emissions From Existing Other Solid Waste Incineration Units, Hospital/Medical/Infectious Waste Incinerator Units, and Commercial and Industrial Solid Waste Incineration Units
2026-12896
Environmental Protection AgencyFinal ruleJun 26
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Louisiana; Control of Emissions From Existing Other Solid Waste Incineration Units
2026-12895
Environmental Protection AgencyFinal ruleJun 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 AgencyProposed ruleJun 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 AgencyProposed ruleJun 23
Congressional Review Act Revocation of 2024 Amendments to the National Emission Standards for Hazardous Air Pollutants: Rubber Tire Manufacturing
2026-12424
Environmental Protection AgencyFinal ruleJun 22
Air Plan Approval; OR; Update to Materials Incorporated by Reference
2026-12415
Environmental Protection AgencyFinal ruleJun 22
Partial Withdrawals of Findings of Failure To Submit State Implementation Plan (SIP) Revisions To Amend Provisions Applying to Excess Emissions During Periods of Startup, Shutdown, and Malfunction
2026-11884
Environmental Protection AgencyFinal ruleJun 12
Ozone Reclassification State Implementation Plan Rule
2026-11843
Environmental Protection AgencyProposed ruleJun 12
Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area
2026-11736
Environmental Protection AgencyProposed ruleJun 11
Attainment Date Extension for the San Joaquin Valley, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area
2026-11735
Environmental Protection AgencyProposed ruleJun 11
Air Plan Approval; New York; New York Metropolitan Area Second Ten-Year Limited Maintenance Plan for the 2006 24-Hour PM2.5 Standard
2026-11732
Environmental Protection AgencyFinal ruleJun 11
Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction
2026-11731
Environmental Protection AgencyFinal ruleJun 11
Air Plan Approval; Connecticut; Ozone Ambient Air Quality Standard and Adhesive and Sealants Regulation Revisions
2026-11728
Environmental Protection AgencyFinal ruleJun 11
Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Regional Haze Federal Implementation Plan
2026-11436
Environmental Protection AgencyProposed ruleJun 8
Air Plan Approval; Minnesota; Revision to Taconite Federal Implementation Plan
2026-11432
Environmental Protection AgencyFinal ruleJun 8
Clean Air Act Title V Operating Permit Program Revision; District of Columbia
2026-11170
Environmental Protection AgencyFinal ruleJun 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 AgencyFinal ruleJun 4
Conditional Approval; Contingency Measure State Implementation Plan for the 2008 Ozone Standards; San Joaquin Valley, California
2026-11168
Environmental Protection AgencyFinal ruleJun 4
National Emission Standards for Hazardous Air Pollutants From Hazardous Waste Combustors: Residual Risk and Technology Review
2026-11047 · significant
Environmental Protection AgencyFinal ruleJun 3
Rescission of Title V Emergency Affirmative Defense Rule
2026-10875
Environmental Protection AgencyFinal ruleJun 1
Air Plan Approval; Indiana; Keystone VOC RACT Alternative Control
2026-10776
Environmental Protection AgencyFinal ruleMay 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 AgencyFinal ruleMay 29
Approval of Source-Specific Air Quality Implementation Plan; New York; Calpine JFK Energy Center
2026-10770
Environmental Protection AgencyFinal ruleMay 29
Air Plan Approval; New York; Athens Generating Plant
2026-10769
Environmental Protection AgencyFinal ruleMay 29
Designation of Areas for Air Quality Planning Purposes; Michigan; Technical Amendment
2026-10768
Environmental Protection AgencyFinal ruleMay 29
Air Plan Approval; Michigan; Determination of Attainment by the Attainment Date for the 2015 Ozone Standards
2026-10767
Environmental Protection AgencyProposed ruleMay 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 AgencyFinal ruleMay 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 AgencyFinal ruleMay 29
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 AgencyFinal ruleMay 29
Air Plan Approval; Virginia; Repeal of Existing Stationary Source Regulations
2026-10745
Environmental Protection AgencyFinal ruleMay 29
South Carolina; Approval of State Plan for Control of Emissions From Commercial and Industrial Solid Waste Incineration Units
2026-10744
Environmental Protection AgencyFinal ruleMay 29
Approval and Promulgation of State Air Quality Plans (Negative Declarations) for Designated Facilities and Pollutants; District of Columbia
2026-10739
Environmental Protection AgencyFinal ruleMay 29
Air Plan Approval; ID; Update to Materials Incorporated by Reference
2026-10738
Environmental Protection AgencyFinal ruleMay 29
Air Plan Approval; Ohio; Removal of Air Nuisance Rule
2026-10643
Environmental Protection AgencyProposed ruleMay 28
Approval of Source-Specific Air Quality Implementation Plan; New York; Big Six Towers Inc.
2026-10642
Environmental Protection AgencyProposed ruleMay 28
Air Plan Approval; SC; Department Name Change
2026-10640
Environmental Protection AgencyProposed ruleMay 28
Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors; Extension of Comment Period
2026-10638
Environmental Protection AgencyProposed ruleMay 28
Phasedown of Hydrofluorocarbons: Excluding Road and Intermodal Container Transport Refrigeration Units From the Hydrofluorocarbon Leak Repair Requirements
2026-10388
Environmental Protection AgencyProposed ruleMay 26
Phasedown of Hydrofluorocarbons: Reconsideration of Certain Regulatory Requirements Promulgated Under the Technology Transitions Provisions of the American Innovation and Manufacturing Act of 2020
2026-10387 · significant
Environmental Protection AgencyFinal ruleMay 26
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Gila County Reasonably Available Control Technology
2026-10280
Environmental Protection AgencyFinal ruleMay 22
Air Plan Approval; FL; Emissions Reporting Requirements and Permitting Forms
2026-10207
Environmental Protection AgencyProposed ruleMay 21
Revision of Tier 4 Criteria Pollutant Standards, Part 1: Amendments to Phase-In Schedule for Light-Duty and Medium-Duty Vehicles
2026-09905
Environmental Protection AgencyProposed ruleMay 18
Air Plan Approval; Montana; Revisions to Western Sugar Stipulation
2026-09619
Environmental Protection AgencyFinal ruleMay 14
Air Plan Approval; Minnesota; Metropolitan Council Wastewater Treatment Plant Title I PM10 SIP Revisions
2026-09618
Environmental Protection AgencyFinal ruleMay 14
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements
2026-09616
Environmental Protection AgencyFinal ruleMay 14
Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Washington; Northwest Clean Air Agency
2026-09615
Environmental Protection AgencyFinal ruleMay 14
Air Plan Approval; Ohio; Clean Data Determination for the Cleveland, Ohio Area for the 2015 Ozone Standard
2026-09614
Environmental Protection AgencyFinal ruleMay 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 AgencyFinal ruleMay 14
Air Plan Approval; Indiana; Indiana NOX Emissions Monitoring
2026-09612
Environmental Protection AgencyFinal ruleMay 14
Determination of Attainment by the Attainment Date and Clean Data Determination for the 2012 Annual Fine Particulate Standard; Plumas County, California
2026-09604
Environmental Protection AgencyProposed ruleMay 14
Begin Actual Construction in the New Source Review (NSR) Preconstruction Permitting Program
2026-09524 · significant
Environmental Protection AgencyProposed ruleMay 13
Air Plan Approval; NC; Removal of the State's Vehicle Inspection and Maintenance Program
2026-09146
Environmental Protection AgencyProposed ruleMay 8
Air Quality Plan; California; San Diego County Air Pollution Control District; Landfill Flares
2026-09055
Environmental Protection AgencyProposed ruleMay 7
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 AgencyProposed ruleMay 7
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
2026-09043
Environmental Protection AgencyFinal ruleMay 7
Air Plan Approval; Delaware; Excess Emissions Provisions Pertaining to Periods of Startup, Shutdown and Malfunction Events
2026-08373
Environmental Protection AgencyProposed ruleApr 30
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 AgencyProposed ruleApr 30
Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors
2026-08364
Environmental Protection AgencyProposed ruleApr 29
Approval of Missouri's Request for Partial Program Delegation of Clean Air Act 112(r) Prevention of Accidental Release Program
2026-08348
Environmental Protection AgencyFinal ruleApr 29
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer
2026-07906
Environmental Protection AgencyProposed ruleApr 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 AgencyProposed ruleApr 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 AgencyProposed ruleApr 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 AgencyFinal ruleApr 23
Air Plan Approval; Virginia; Revision to the Regulatory Definition of Volatile Organic Compound
2026-07885
Environmental Protection AgencyFinal ruleApr 23
Air Plan Approval; Missouri; Construction Permits Required
2026-07884
Environmental Protection AgencyFinal ruleApr 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 AgencyProposed ruleApr 22
Air Plan Approval; Virginia; Amendment to the State Operating Permit for GP Big Island, LLC
2026-07527
Environmental Protection AgencyFinal ruleApr 17
Air Plan Revisions; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits
2026-07405
Environmental Protection AgencyProposed ruleApr 16
Air Plan Approval; Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standards
2026-07400
Environmental Protection AgencyFinal ruleApr 16
Air Plan Approval; Pennsylvania; Redesignation Request for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard
2026-07399
Environmental Protection AgencyFinal ruleApr 16
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Portland Cement Kilns
2026-07398
Environmental Protection AgencyFinal ruleApr 16
Air Plan Approval; Ohio; Redesignation of the Cleveland, OH Area to Attainment of the 2015 Ozone Standards
2026-06943
Environmental Protection AgencyProposed ruleApr 10
Air Plan Approvals; Indiana; Prong 4 (Visibility) for the 2015 Ozone National Ambient Air Quality Standard
2026-06942
Environmental Protection AgencyProposed ruleApr 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 AgencyProposed ruleApr 10
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT for Ohio
2026-06940
Environmental Protection AgencyProposed ruleApr 10
Air Plan Approval; New York; Interstate Transport Requirements for the 2010 SO2 NAAQS
2026-06938
Environmental Protection AgencyProposed ruleApr 10
Air Plan Approval and Air Quality Designation; Ohio; Attainment Plan and Redesignation of the Canton Area to Attainment of the 2008 Lead Standard
2026-06937
Environmental Protection AgencyProposed ruleApr 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 AgencyFinal ruleApr 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 AgencyFinal ruleApr 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 AgencyFinal ruleApr 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 AgencyProposed ruleApr 9
Reconsideration of Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review
2026-06808 · significant
Environmental Protection AgencyFinal ruleApr 9
Protection of Stratospheric Ozone: Listing of Substitutes Under the Significant New Alternatives Policy Program in Refrigeration and Air Conditioning and Fire Suppression; Supplemental Notice of Proposed Rulemaking
2026-06665
Environmental Protection AgencyProposed ruleApr 6
Clean Air Act Operating Permit Program Revision; California; Monterey Bay Air Resources District
2026-06443
Environmental Protection AgencyProposed ruleApr 2
Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas
2026-06442
Environmental Protection AgencyProposed ruleApr 2
Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction
2026-06441
Environmental Protection AgencyProposed ruleApr 2
Air Plan Approval; Ohio; Ohio Permit Rules Revisions
2026-06398
Environmental Protection AgencyFinal ruleApr 2
Air Plan Approval; Ohio; Muskingum River 2010 Sulfur Dioxide Redesignation and Maintenance Plan
2026-06397
Environmental Protection AgencyFinal ruleApr 2
Air Plan Approval; Michigan; Detroit 2010 Sulfur Dioxide Redesignation and Maintenance Plan
2026-06396
Environmental Protection AgencyFinal ruleApr 2
Air Plan Approval; Oregon; 2024 Vehicle Inspection Program Updates
2026-06388
Environmental Protection AgencyFinal ruleApr 2
Air Quality Plan; California; Mojave Desert Air Quality Management District; Replacing Outdated Requirements; Correction
2026-06386
Environmental Protection AgencyFinal ruleApr 2
Air Plan Approval; Connecticut; New Source Review Permit Program State Plan Revision
2026-06384
Environmental Protection AgencyFinal ruleApr 2
Commerce Acquisition Regulation; Minor Amendments
2026-06382
Commerce DepartmentFinal ruleApr 2
National Emission Standards for Hazardous Air Pollutants: Chemical Manufacturing Area Sources Technology Review
2026-06304
Environmental Protection AgencyFinal ruleApr 1
Renewable Fuel Standard (RFS) Program: Standards for 2026 and 2027, Partial Waiver of 2025 Cellulosic Biofuel Volume Requirement, and Other Changes
2026-06275 · significant
Environmental Protection AgencyFinal ruleApr 1
Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations
2026-05875
Environmental Protection AgencyProposed ruleMar 26
Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Washington; Southwest Clean Air Agency
2026-05712
Environmental Protection AgencyFinal ruleMar 24
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 AgencyProposed ruleMar 23
Air Plan Revisions; California; Antelope Valley Air Quality Management District; New Source Review; Stationary Source Permits
2026-05636
Environmental Protection AgencyProposed ruleMar 23
Air Plan Approval; Texas; Reasonably Available Control Technology in the Dallas-Fort Worth Ozone Nonattainment Area
2026-05607
Environmental Protection AgencyFinal ruleMar 23
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Louisiana; Control of Emissions From Existing Other Solid Waste Incineration Units
2026-05606
Environmental Protection AgencyProposed ruleMar 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 AgencyFinal ruleMar 23
Air Plan Approval; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area
2026-05596
Environmental Protection AgencyFinal ruleMar 23
Approval of Clean Air Plans; San Joaquin Valley, California; Contingency Measures for 1997 Ozone Standards
2026-05592
Environmental Protection AgencyFinal ruleMar 23
Air Plan Revisions; California; Mojave Desert Air Quality Management District; New Source Review; Stationary Source Permits
2026-05591
Environmental Protection AgencyFinal ruleMar 23
Protecting Public Health and Unleashing American Energy by Facilitating Scrap Tire Pile Cleanups
2026-05586
Environmental Protection AgencyProposed ruleMar 23
Air Plan Approval; Ohio; Volatile Organic Compounds RFD Beaufort
2026-05568
Environmental Protection AgencyFinal ruleMar 23
Air Plan Approval; New Hampshire; Single Source VOC RACT Order for Hutchinson Sealing Systems
2026-05567
Environmental Protection AgencyFinal ruleMar 23
Commercial and Industrial Solid Waste Incineration Units: Temporary-Use Incinerators and Air Curtain Incinerators Used in Disaster Recovery; Rescission of Interim Final Rule
2026-05395
Environmental Protection AgencyFinal ruleMar 19
National Emission Standards for Hazardous Air Pollutants: Polyether Polyols Production Industry Review
2026-05261
Environmental Protection AgencyFinal ruleMar 18
National Emission Standards for Hazardous Air Pollutants: Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review Reconsideration
2026-05167 · significant
Environmental Protection AgencyProposed ruleMar 17
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 AgencyProposed ruleMar 13
National Priorities List
2026-04904
Environmental Protection AgencyFinal ruleMar 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 AgencyProposed ruleMar 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 AgencyFinal ruleMar 10
Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Large Municipal Waste Combustors Voluntary Remand Response and Five-Year Review
2026-04646 · significant
Environmental Protection AgencyFinal ruleMar 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 AgencyProposed ruleMar 4
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Texas; Control of Emissions From Existing Municipal Solid Waste Landfills
2026-04338
Environmental Protection AgencyProposed ruleMar 4
Air Plan Approval; OR; Klamath Falls PM2.5 Redesignation to Attainment and Maintenance Plan
2026-04333
Environmental Protection AgencyProposed ruleMar 4
Proposed Deletion From the National Priorities List
2026-04321
Environmental Protection AgencyProposed ruleMar 4
Deletion From the National Priorities List
2026-04320
Environmental Protection AgencyFinal ruleMar 4
Air Plan Approval; AK; Regional Haze State Implementation Plan for the Second Implementation Period
2026-04159
Environmental Protection AgencyFinal ruleMar 3
Air Plan Approval; Michigan; 2015 Ozone Moderate Reasonably Available Control Technology
2026-03937
Environmental Protection AgencyProposed ruleFeb 27
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 AgencyProposed ruleFeb 27
Air Plan Approval; Ohio; Clean Data Determination for the Cleveland, Ohio Area for the 2015 Ozone Standard
2026-03934
Environmental Protection AgencyProposed ruleFeb 27
Air Plan Approval; Indiana; Keystone VOC RACT Alternative Control
2026-03933
Environmental Protection AgencyProposed ruleFeb 27
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT and SIP Strengthening for Ohio
2026-03931
Environmental Protection AgencyProposed ruleFeb 27
Approval of Missouri's Request for Partial Program Delegation of Clean Air Act Section 112(r) Prevention of Accidental Release Program
2026-03891
Environmental Protection AgencyProposed ruleFeb 26
Air Plan Approval; Missouri; Reporting Emission Data, Emission Fees, and Process Information
2026-03888
Environmental Protection AgencyFinal ruleFeb 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 AgencyFinal ruleFeb 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 AgencyFinal ruleFeb 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 AgencyProposed ruleFeb 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 AgencyProposed ruleFeb 26
Prior Notice of Citizen Suits
2026-03646
Environmental Protection AgencyProposed ruleFeb 24
National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units: Final Repeal
2026-03638 · significant
Environmental Protection AgencyFinal ruleFeb 24
Accidental Release Prevention Requirements: Risk Management Programs Under the Clean Air Act; Common Sense Approach to Chemical Accident Prevention
2026-03633 · significant
Environmental Protection AgencyProposed ruleFeb 24
Rescission of the Greenhouse Gas Endangerment Finding and Motor Vehicle Greenhouse Gas Emission Standards Under the Clean Air Act
2026-03157 · significant
Environmental Protection AgencyFinal ruleFeb 18
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 AgencyProposed ruleFeb 17
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Gila County Reasonably Available Control Technology
2026-02845
Environmental Protection AgencyProposed ruleFeb 12
Approval and Promulgation of Air Quality Implementation Plans; Oklahoma; Regional Haze State Implementation Plan for the Second Implementation Period
2026-02843
Environmental Protection AgencyProposed ruleFeb 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 AgencyProposed ruleFeb 12
Air Plan Approval; Oklahoma; Interstate Transport Requirements for the 2010 SO2 NAAQS
2026-02841
Environmental Protection AgencyProposed ruleFeb 12
Partial Approval and Promulgation of State Plan for Designated Facilities and Pollutants; West Virginia; Control of Emissions From Existing Commercial and Industrial Solid Waste Incineration (CISWI) Units, Plan Revision
2026-02830
Environmental Protection AgencyProposed ruleFeb 12
Air Plan Approval; Ohio; Second Maintenance Plan for 2008 Ozone NAAQS
2026-02822
Environmental Protection AgencyFinal ruleFeb 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 AgencyProposed ruleFeb 12
Deletion From the National Priorities List; Correction
2026-02809
Environmental Protection AgencyFinal ruleFeb 12
Air Plan Approval; AK; Updates to Materials Incorporated by Reference
2026-02478
Environmental Protection AgencyFinal ruleFeb 9
Air Plan Approval; Connecticut; Revised Format for Materials Incorporated by Reference
2026-02477
Environmental Protection AgencyFinal ruleFeb 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 AgencyProposed ruleFeb 6
Air Plan Revisions; California; Heavy-Duty Vehicle Inspection and Maintenance Program
2026-02350
Environmental Protection AgencyFinal ruleFeb 6
Approval and Promulgation of Air Quality Implementation Plans; Nevada; Regional Haze State Implementation Plan for the Second Implementation Period
2026-02344
Environmental Protection AgencyFinal ruleFeb 6
Interstate Transport Plan Review for the 2015 Ozone NAAQS
2026-01844 · significant
Environmental Protection AgencyProposed ruleJan 30
Air Plan Approval and Air Quality Designation; KY; Redesignation of the Kentucky Portion of the Louisville, KY-IN 2015 8-Hour Ozone Nonattainment Area to Attainment
2026-01772
Environmental Protection AgencyFinal ruleJan 29
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 AgencyFinal ruleJan 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 AgencyFinal ruleJan 29
Air Plan Approval; OR; Lane County Permitting Rule Revisions
2026-01735
Environmental Protection AgencyFinal ruleJan 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 AgencyProposed ruleJan 29
Air Plan Disapproval; Colorado; Regional Haze Plan for the Second Implementation Period
2026-01413
Environmental Protection AgencyFinal ruleJan 26
Air Plan Approval; Arkansas; Codification of the State Implementation Plan
2026-01410
Environmental Protection AgencyFinal ruleJan 26
Air Plan Approval; Oklahoma; Revisions to Air Pollution Control Rules
2026-01408
Environmental Protection AgencyFinal ruleJan 26
Air Plan Approval; Indiana; Regional Haze Plan for the Second Implementation Period
2026-01406
Environmental Protection AgencyFinal ruleJan 26
Air Plan Approval; Montana; Revisions to Western Sugar Stipulation
2026-01324
Environmental Protection AgencyProposed ruleJan 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 AgencyProposed ruleJan 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 AgencyProposed ruleJan 23
Air Plan Approval; Ohio; 2015 Ozone Moderate Reasonably Available Control Technology
2026-01001
Environmental Protection AgencyFinal ruleJan 20
Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley
2026-00782
Environmental Protection AgencyProposed ruleJan 15
New Source Performance Standards Review for Stationary Combustion Turbines and Stationary Gas Turbines
2026-00677 · significant
Environmental Protection AgencyFinal ruleJan 15
Air Plan Approval; New York; Ortho Clinical Diagnostics
2026-00281
Environmental Protection AgencyFinal ruleJan 9
Air Plan Approval; Ohio; Ohio Permit Rules Revisions
2026-00258
Environmental Protection AgencyProposed ruleJan 9
Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Ohio; Delegation of Authority
2026-00253
Environmental Protection AgencyFinal ruleJan 9
Air Plan Approval; New Hampshire; Updates to Materials Incorporated by Reference
2026-00249
Environmental Protection AgencyFinal ruleJan 9
Air Plan Approval; Indiana; Huntington County 2010 Sulfur Dioxide Redesignation and Maintenance Plan
2026-00246
Environmental Protection AgencyFinal ruleJan 9
Clean Air Act Title V Operating Permit Program Revision; District of Columbia
2026-00215
Environmental Protection AgencyProposed ruleJan 8
Air Plan Approval; Missouri; Construction Permits Required
2026-00214
Environmental Protection AgencyProposed ruleJan 8
Air Plan Approval; California; Mojave Desert Air Quality Management District; Replacing Outdated Requirements
2026-00208
Environmental Protection AgencyFinal ruleJan 8
Air Plan Approval; Kentucky; Emissions Inventory and Nonattainment New Source Review for the Henderson-Webster Sulfur Dioxide Nonattainment Area
2026-00201
Environmental Protection AgencyFinal ruleJan 8
Air Plan Approval; California; Mojave Desert Air Quality Management District; Definition of Terms
2026-00194
Environmental Protection AgencyFinal ruleJan 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 AgencyFinal ruleJan 6
Air Plan Revision; California; Placer County Air Pollution Control District; New Source Review
2026-00006
Environmental Protection AgencyFinal ruleJan 6
Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District
2026-00005
Environmental Protection AgencyFinal ruleJan 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 AgencyFinal ruleJan 6
Extension of the State Implementation Plan Due Date for the Regional Haze Third Implementation Period
2026-00003
Environmental Protection AgencyFinal ruleJan 6
Air Plan Approval; Michigan and Minnesota; Revision to Taconite Federal Implementation Plan
2025-24207
Environmental Protection AgencyFinal ruleJan 2
Congressional Review Act Revocation of 2024 Review of Final Rule Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act
2025-24202
Environmental Protection AgencyFinal ruleJan 2
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 AgencyProposed ruleJan 2
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
2025-24149
Environmental Protection AgencyFinal ruleJan 2
Air Plan Approval; Colorado; Revisions to Colorado Procedural Rules and Common Provisions Regulation
2025-24141
Environmental Protection AgencyFinal ruleJan 2
New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana
2025-23284
Environmental Protection AgencyFinal ruleDec 18, 2025
New Source Performance Standards; Delegation of Authority to Oklahoma
2025-23275
Environmental Protection AgencyFinal ruleDec 18, 2025
Air Plan Approval: Arizona: Infrastructure Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard
2025-23259
Environmental Protection AgencyFinal ruleDec 18, 2025
Air Plan Approval; New Hampshire; Single Source VOC RACT Order for Hutchinson Sealing Systems
2025-22610
Environmental Protection AgencyProposed ruleDec 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 AgencyProposed ruleDec 11, 2025
Air Plan Approval; Connecticut; Plan Submittals for the 2008 Ozone National Ambient Air Quality Standard
2025-22595
Environmental Protection AgencyFinal ruleDec 11, 2025
Air Plan Disapproval; Ohio; E-Check Attestation Provisions
2025-22594
Environmental Protection AgencyProposed ruleDec 11, 2025
Air Plan Approval; California; South Coast Air Quality Management District
2025-22584
Environmental Protection AgencyFinal ruleDec 11, 2025
Approval of Air Quality Implementation Plans; Arizona; Arizona Department of Environmental Quality; Stationary Source Permits; West Pinal County; PM10
2025-22582
Environmental Protection AgencyFinal ruleDec 11, 2025
Air Plan Approval; South Carolina; Second Planning Period Regional Haze Plan
2025-22565
National Oceanic and Atmospheric AdministrationFinal ruleDec 11, 2025
Air Plan Approval; Tennessee; Second Period Regional Haze Plan
2025-22564
Environmental Protection AgencyFinal ruleDec 11, 2025
Air Plan Approval; Ohio; Carmeuse Lime, Inc. SO2
2025-22562
Environmental Protection AgencyFinal ruleDec 11, 2025
Air Plan Approval; Virginia; Amendment to the State Operating Permit for GP Big Island, LLC
2025-22533
Environmental Protection AgencyProposed ruleDec 11, 2025
Air Plan Approval; California; San Joaquin Valley Air Pollution Control District
2025-22530
Environmental Protection AgencyProposed ruleDec 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 AgencyFinal ruleDec 11, 2025
National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks, and Coke Oven Batteries; Rescission of Extension of Compliance Deadlines for Coke Oven Facilities
2025-22034
Environmental Protection AgencyFinal ruleDec 5, 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 AgencyFinal ruleDec 5, 2025
Oil and Natural Gas Sector Climate Review: Extension of Deadlines in Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources
2025-21788 · significant
Environmental Protection AgencyFinal ruleDec 3, 2025
Air Plan Approval; Virginia; Repeal of Existing Stationary Source Regulations
2025-21557
Environmental Protection AgencyProposed ruleNov 28, 2025
Air Plan Approval; Connecticut; New Source Review Permit Program State Plan Revision
2025-21413
Environmental Protection AgencyProposed ruleNov 28, 2025
Air Plan Approval; Missouri; Reporting Emission Data, Emission Fees, and Process Information
2025-21346
Environmental Protection AgencyProposed ruleNov 28, 2025
Air Plan Approval; Montana; Regional Haze Plan for the Second Implementation Period
2025-21340
Environmental Protection AgencyFinal ruleNov 28, 2025
Air Plan Approval; Ohio; Emergency Episodes and Ambient Air Quality Standards
2025-21322
Environmental Protection AgencyFinal ruleNov 26, 2025
Delegation of Authority to North Carolina and Forsyth County of the Federal Plan for Existing Landfills
2025-21306
Environmental Protection AgencyFinal ruleNov 26, 2025
Air Plan Approval; Indiana; Second Maintenance Plan for 2008 Ozone NAAQS
2025-20672
Environmental Protection AgencyProposed ruleNov 21, 2025
Air Plan Approval; New York; Athens Generating Plant
2025-20499
Environmental Protection AgencyProposed ruleNov 20, 2025
Air Plan Approval; Maine; Chapter 140: Part 70 Air Emission License Regulation
2025-20498
Environmental Protection AgencyProposed ruleNov 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 AgencyProposed ruleNov 20, 2025
Operating Permit Program Approval; New Hampshire; Revised Definitions
2025-20496
Environmental Protection AgencyProposed ruleNov 20, 2025
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements
2025-20495
Environmental Protection AgencyFinal ruleNov 20, 2025
Air Plan Approval; Minnesota; Exempt Source SIP Revision
2025-20492
Environmental Protection AgencyFinal ruleNov 20, 2025
Air Plan Approval; Connecticut; Ozone Ambient Air Quality Standard and Adhesive and Sealants Regulation Revisions
2025-20463
Environmental Protection AgencyProposed ruleNov 20, 2025
Air Plan Approval; Rhode Island; Decommissioning of Stage II Vapor Recovery Systems
2025-20458
Environmental Protection AgencyFinal ruleNov 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 AgencyFinal ruleNov 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 AgencyProposed ruleNov 20, 2025
Air Plan Approval; Minnesota; Metropolitan Council Wastewater Treatment Plant Title I PM10 SIP Revisions
2025-20441
Environmental Protection AgencyProposed ruleNov 20, 2025
Approval and Promulgation of State Air Quality Plans (Negative Declarations) for Designated Facilities and Pollutants; District of Columbia
2025-20419
Environmental Protection AgencyProposed ruleNov 20, 2025
Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment Area
2025-20418
Environmental Protection AgencyProposed ruleNov 20, 2025
Air Plan Approval; District of Columbia; Creation of Synthetic Minor Permit Program
2025-20416
Environmental Protection AgencyProposed ruleNov 20, 2025
Air Plan Approval; AK; Regional Haze Plan for the Second Implementation Period; Extension of Comment Period
2025-20415
Environmental Protection AgencyProposed ruleNov 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 AgencyProposed ruleNov 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 AgencyProposed ruleNov 20, 2025
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Stationary Combustion Turbines
2025-20407
Environmental Protection AgencyFinal ruleNov 20, 2025
Approval of the Clean Air Act, Section 112(l), Authority for Hazardous Air Pollutants; State of Connecticut Department of Energy and Environmental Protection; Approval of the Clean Air Act Section 502, State Operating Permit Programs, State of Connecticut Department of Energy and Environmental Protection
2025-20372
Environmental Protection AgencyFinal ruleNov 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 AgencyProposed ruleNov 19, 2025
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Petroleum Solvent Dry Cleaning
2025-20354
Environmental Protection AgencyFinal ruleNov 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 AgencyFinal ruleNov 19, 2025
Air Plan Approval; Colorado; Inspection and Maintenance Program Revision
2025-20205
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; Montana: Infrastructure Requirements for the 2015 Ozone National Ambient Air Quality Standards
2025-20203
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; State of Kansas; Attainment Redesignation for 2008 Lead NAAQS and Associated Maintenance Plan
2025-20200
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; IA, Muscatine; 2010 1-Hour SO2 Maintenance Plan and Redesignation
2025-20197
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; New Jersey; Northern New Jersey and Southern New Jersey Counties' Second 10-Year Limited Maintenance Plan for the 2006 24-Hour PM2.5 Standard
2025-20194
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; Michigan; Revisions to Part 1 and 2 Rules
2025-20150
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; Rhode Island; Amendments to Motor Vehicle Inspection and Maintenance Program
2025-20143
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; Connecticut; 2014 and 2017 Periodic Emissions Inventory for 2008 8-Hour Ozone NAAQS
2025-20142
Environmental Protection AgencyFinal ruleNov 18, 2025
Air Plan Approval; Vermont; Regional Haze State Implementation Plan for the Second Implementation Period
2025-20141
Environmental Protection AgencyFinal ruleNov 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 AgencyFinal ruleNov 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 AgencyFinal ruleNov 18, 2025
Air Plan Approval; Arizona; Yuma 2015 8-Hour Ozone Nonattainment Area; Redesignation Request and Maintenance Plan
2025-20095
Environmental Protection AgencyFinal ruleNov 18, 2025
Approval of Source-Specific Air Quality Implementation Plan; New York; Calpine JFK Energy Center
2025-19992
Environmental Protection AgencyProposed ruleNov 17, 2025
Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP Provisions
2025-19989
Environmental Protection AgencyProposed ruleNov 17, 2025
Approval of Clean Air Plans; San Joaquin Valley, California; Contingency Measures for 1997 Ozone Standards
2025-19884
Environmental Protection AgencyProposed ruleNov 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 AgencyFinal ruleNov 10, 2025
National Emission Standards for Hazardous Air Pollutants From Hazardous Waste Combustors: Residual Risk and Technology Review; Withdrawal of Proposed Revisions to Standards for Periods of Malfunction
2025-19815 · significant
Environmental Protection AgencyProposed ruleNov 10, 2025
Protection of Stratospheric Ozone: Listing of Substitutes Under the Significant New Alternatives Policy Program in Refrigeration and Air Conditioning and Fire Suppression
2025-19812
Environmental Protection AgencyProposed ruleNov 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 AgencyFinal ruleOct 30, 2025
Air Plan Approval; AK; Regional Haze Plan for the Second Implementation Period
2025-19713
Environmental Protection AgencyProposed ruleOct 30, 2025
Air Plan Approval; Arizona; Interstate Transport Requirements for the 2012 Fine Particulate Matter National Ambient Air Quality Standard
2025-19638
Environmental Protection AgencyProposed ruleOct 23, 2025
Approval and Promulgation of Air Quality Implementation Plans; Nevada; Regional Haze State Implementation Plan for the Second Implementation Period
2025-19637
Environmental Protection AgencyProposed ruleOct 23, 2025
Phasedown of Hydrofluorocarbons: Reconsideration of Certain Regulatory Requirements Promulgated Under the Technology Transitions Provisions of the American Innovation and Manufacturing Act of 2020
2025-19438 · significant
Environmental Protection AgencyProposed ruleOct 3, 2025
Visibility Protection: Regional Haze State Plan Requirements Rule Revision
2025-19280 · significant
Environmental Protection AgencyProposed ruleOct 2, 2025
Air Plan Approval; Ohio; Muskingum River 2010 Sulfur Dioxide Redesignation and Maintenance Plan
2025-19278
Environmental Protection AgencyProposed ruleOct 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 AgencyFinal ruleOct 2, 2025
Air Plan Approval; GA; Removal of Emissions Statements Requirement and Updates To Permit by Rule
2025-19228
Environmental Protection AgencyFinal ruleOct 2, 2025
Air Plan Approval; Alabama; Standards for Granting Permits and Major New Source Review Permit Rules
2025-19227
Environmental Protection AgencyFinal ruleOct 2, 2025
Air Plan Approval; GA; Updates to the Cross-State Air Pollution Rule
2025-19226
Environmental Protection AgencyFinal ruleOct 2, 2025
Air Plan Approval; North Carolina; Revisions to Regulations for Sulfur Dioxide Emissions From Combustion Sources
2025-19225
Environmental Protection AgencyFinal ruleOct 2, 2025
National Emission Standards for Hazardous Air Pollutants From Secondary Lead Smelting Technology Review
2025-19155
Environmental Protection AgencyProposed ruleOct 1, 2025
Air Plan Approval; New York; Update to Materials Incorporated by Reference
2025-18690
Environmental Protection AgencyFinal ruleSep 26, 2025
Air Plan Approval; Ohio; Volatile Organic Compounds RFD Beaufort
2025-18652
Environmental Protection AgencyProposed ruleSep 25, 2025
Air Plan Approval; California; San Joaquin Valley 1-Hour Ozone Area; Maintenance Plan and Redesignation Request
2025-18637
Environmental Protection AgencyFinal ruleSep 25, 2025
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; San Joaquin Valley
2025-18636
Environmental Protection AgencyFinal ruleSep 25, 2025
Air Plan Approval; Virginia; Revision to the Regulatory Definition of Volatile Organic Compound
2025-18635
Environmental Protection AgencyProposed ruleSep 25, 2025
Air Plan Approval; Oregon; 2024 Vehicle Inspection Program Updates
2025-18629
Environmental Protection AgencyProposed ruleSep 25, 2025
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program Certification
2025-18626
Environmental Protection AgencyFinal ruleSep 25, 2025
Air Plan Approval; West Virginia; 2024 Amendments to West Virginia's Ambient Air Quality Standards
2025-18611
Environmental Protection AgencyFinal ruleSep 25, 2025
Air Plan Approval; Washington; Regional Haze State Implementation Plan for the Second Implementation Period
2025-18599
Environmental Protection AgencyFinal ruleSep 25, 2025
Air Plan Approval; Indiana; Huntington County 2010 Sulfur Dioxide Redesignation and Maintenance Plan
2025-18594
Environmental Protection AgencyProposed ruleSep 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 AgencyProposed ruleSep 25, 2025
Air Plan Approval; Missouri; Definitions and Common Reference Tables
2025-18568
Environmental Protection AgencyFinal ruleSep 25, 2025
Renewable Fuel Standard (RFS) Program: Standards for 2026 and 2027, Partial Waiver of 2025 Cellulosic Biofuel Volume Requirement, and Other Changes; Supplemental Notice of Proposed Rulemaking
2025-18111 · significant
Environmental Protection AgencyProposed ruleSep 18, 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 AgencyFinal ruleSep 18, 2025
Air Plan Approval; Guam; Guam Environmental Protection Agency; New Source Review
2025-18062
Environmental Protection AgencyFinal ruleSep 18, 2025
Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District
2025-17638
Environmental Protection AgencyProposed ruleSep 12, 2025
Air Plan Approval; California; Mojave Desert Air Quality Management District; Replacing Outdated Requirements
2025-17528
Environmental Protection AgencyProposed ruleSep 11, 2025
Proposed Deletion From the National Priorities List
2025-17505
Environmental Protection AgencyProposed ruleSep 11, 2025
Approval of Air Quality Implementation Plans; Arizona; Arizona Department of Environmental Quality; Stationary Source Permits; West Pinal County; PM10
2025-17502
Environmental Protection AgencyProposed ruleSep 11, 2025
Air Plan Revisions; Arizona; Maricopa County Air Quality Department; Particulate Matter; Incinerators, Burn-Off Ovens, and Crematories
2025-17501
Environmental Protection AgencyProposed ruleSep 11, 2025
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds; Architectural Coatings
2025-17500
Environmental Protection AgencyProposed ruleSep 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 AgencyProposed ruleSep 11, 2025
Air Plan Revisions; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds; Solvent Cleaning
2025-17498
Environmental Protection AgencyProposed ruleSep 11, 2025
Air Plan Approval; Wyoming; R-35 Wyoming Air Quality Standards and Regulations Rule Package
2025-17486
Environmental Protection AgencyFinal ruleSep 11, 2025
Air Plan Approval; New Jersey; Memorandum of Agreement To Address NOX SIP Call Requirements
2025-17485
Environmental Protection AgencyFinal ruleSep 11, 2025
Air Plan Approval; Michigan; Second Period Regional Haze Plan
2025-17096
Environmental Protection AgencyFinal ruleSep 5, 2025
Air Plan Approval; Texas; Reasonably Available Control Technology in the Dallas-Fort Worth Ozone Nonattainment Area
2025-17081
Environmental Protection AgencyProposed ruleSep 5, 2025
Air Plan Approval; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area
2025-17080
Environmental Protection AgencyProposed ruleSep 5, 2025
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
2025-17064
Environmental Protection AgencyFinal ruleSep 5, 2025
Air Plan Approval; California; State Implementation Plan Revision for Chico, Modesto and Stockton Carbon Monoxide Maintenance Areas
2025-17061
Environmental Protection AgencyFinal ruleSep 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 AgencyFinal ruleSep 5, 2025
Air Plan Approval; OR; Lane County Permitting Rule Revisions
2025-17055
Environmental Protection AgencyProposed ruleSep 5, 2025
Air Plan Approval; ID; Regional Haze Plan for the Second Implementation Period
2025-17054
Environmental Protection AgencyFinal ruleSep 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 AgencyProposed ruleSep 5, 2025
Approval of Air Quality Implementation Plans; California; Regional Haze State Implementation Plan for the Second Implementation Period
2025-17045
Environmental Protection AgencyFinal ruleSep 5, 2025
Air Plan Approval; Arkansas; Regional Haze State Implementation Plan for the Second Implementation Period
2025-17041
Environmental Protection AgencyProposed ruleSep 5, 2025
Revisions to the Clean Air Act Operating Permit Program; California; San Diego County Air Pollution Control District
2025-17039
Environmental Protection AgencyFinal ruleSep 5, 2025
Revisions to the Clean Air Act Operating Permit Program; California; San Diego County Air Pollution Control District
2025-17038
Environmental Protection AgencyProposed ruleSep 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 AgencyFinal ruleSep 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 AgencyFinal ruleSep 5, 2025
National Emission Standards for Hazardous Air Pollutants for the Polyether Polyols Production Industry: Removal of Affirmative Defense
2025-16744
Environmental Protection AgencyFinal ruleSep 2, 2025
Air Plan Approval; GA; Removal of Nonattainment Area New Source Review
2025-16723
Environmental Protection AgencyProposed ruleSep 2, 2025
Approval of the Clean Air Act, Section 112(l), Authority for Hazardous Air Pollutants; State of Connecticut Department of Energy and Environmental Protection; Approval of the Clean Air Act Section 502, State Operating Permit Programs, State of Connecticut Department of Energy and Environmental Protection
2025-16486
Environmental Protection AgencyProposed ruleAug 28, 2025
Air Plan Approval; Ohio; 2015 Ozone Moderate Reasonably Available Control Technology SIP
2025-16484
Environmental Protection AgencyProposed ruleAug 28, 2025
Air Plan Approval; Arkansas; Codification of the State Implementation Plan
2025-16483
Environmental Protection AgencyProposed ruleAug 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 AgencyProposed ruleAug 28, 2025
Air Plan Approval; South Dakota; Regional Haze Plan for the Second Implementation Period
2025-16468
Environmental Protection AgencyFinal ruleAug 28, 2025
Air Plan Approval; Texas; Interstate Transport Requirements for the 2010 SO2 NAAQS
2025-16467
Environmental Protection AgencyFinal ruleAug 28, 2025
Air Plan Approval; California; Mojave Desert Air Quality Management District; Internal Combustion Engines
2025-16466
Environmental Protection AgencyFinal ruleAug 28, 2025
Commercial and Industrial Solid Waste Incineration Units: Temporary-Use Incinerators and Air Curtain Incinerators Used in Disaster Recovery
2025-16360
Environmental Protection AgencyFinal ruleAug 26, 2025
Phasedown of Hydrofluorocarbons: Review and Renewal of Eligibility for Application-Specific Allowances
2025-16357 · significant
Environmental Protection AgencyFinal ruleAug 26, 2025
Air Plan Revisions; California; Heavy-Duty Vehicle Inspection and Maintenance Program
2025-16325
Environmental Protection AgencyProposed ruleAug 26, 2025
Florida; Approval of State Plan for Control of Emissions From Commercial and Industrial Solid Waste Incineration Units
2025-16193
Environmental Protection AgencyFinal ruleAug 25, 2025
Air Plan Approval; WA; Update to Materials Incorporated by Reference
2025-15992
Environmental Protection AgencyFinal ruleAug 21, 2025
Determination of Attainment by the Attainment Date; 2008 8-Hour Ozone Standards; California; Sacramento Metro Area
2025-15990
Environmental Protection AgencyFinal ruleAug 21, 2025
Air Plan Approval; California; Revised Format for Materials Incorporated by Reference
2025-15989
Environmental Protection AgencyFinal ruleAug 21, 2025
Air Plan Approval; Alabama; Standards for Granting Permits and Major New Source Review Permit Rules
2025-15987
Environmental Protection AgencyProposed ruleAug 21, 2025
Air Plan Approval; GA; Removal of Emissions Statements Requirement and Updates To Permit by Rule
2025-15986
Environmental Protection AgencyProposed ruleAug 21, 2025
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Petroleum Solvent Dry Cleaning
2025-15984
Environmental Protection AgencyProposed ruleAug 21, 2025
Air Plan Approval; IA, Muscatine; 2010 1-Hour SO2 Maintenance Plan and Redesignation
2025-15983
Environmental Protection AgencyProposed ruleAug 21, 2025
Air Plan Approval; Tennessee; Second Planning Period Regional Haze Plan
2025-15748
Environmental Protection AgencyProposed ruleAug 19, 2025
Air Plan Approval; North Carolina; Removal of Emissions Exemptions
2025-15557
Environmental Protection AgencyProposed ruleAug 15, 2025
Air Plan Approval; GA; Updates to the Cross-State Air Pollution Rule
2025-15461
Environmental Protection AgencyProposed ruleAug 14, 2025
Air Plan Approval; North Carolina; Revisions to Regulations for Sulfur Dioxide Emissions From Combustion Sources
2025-15460
Environmental Protection AgencyProposed ruleAug 14, 2025
Air Plan Approval; Rhode Island; Decommissioning of Stage II Vapor Recovery Systems
2025-15459
Environmental Protection AgencyProposed ruleAug 14, 2025
Air Plan Approval; Michigan; Detroit 2010 Sulfur Dioxide Redesignation and Maintenance Plan
2025-15458
Environmental Protection AgencyProposed ruleAug 14, 2025
Finding of Failure To Attain; Air Plan Approval; Indiana; Huntington County Sulfur Dioxide Attainment Plan
2025-15455
Environmental Protection AgencyFinal ruleAug 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 AgencyFinal ruleAug 14, 2025
Air Plan Approval; IA; Alter Metal Recycling Permit Modification
2025-15442
Environmental Protection AgencyFinal ruleAug 14, 2025
Air Plan Approval; Oregon; Lane Regional Air Protection Agency, Outdoor Burning
2025-15441
Environmental Protection AgencyFinal ruleAug 14, 2025
Air Plan Approval; Missouri; Removal of Obsolete Rules on Control of NOX Emissions
2025-15440
Environmental Protection AgencyFinal ruleAug 14, 2025
Air Plan Approval; Ohio; Carmeuse Lime, Inc. SO2
2025-14989
Environmental Protection AgencyProposed ruleAug 7, 2025
Air Plan Approval; Wyoming; Revisions to Regional Haze State Implementation Plan
2025-14983
Environmental Protection AgencyFinal ruleAug 7, 2025
Air Plan Approval; Colorado; Inspection and Maintenance Program Revision
2025-14982
Environmental Protection AgencyProposed ruleAug 7, 2025
Air Plan Approval; State of Kansas; Attainment Redesignation for the 2008 Lead NAAQS and Associated Maintenance Plan
2025-14980
Environmental Protection AgencyProposed ruleAug 7, 2025
Air Plan Approval; OR; Update to Materials Incorporated by Reference
2025-14971
Environmental Protection AgencyFinal ruleAug 7, 2025
Air Plan Approval; IA; Regional Haze State Implementation Plan for the Second Implementation Period
2025-14850
Environmental Protection AgencyFinal ruleAug 5, 2025
Reconsideration of 2009 Endangerment Finding and Greenhouse Gas Vehicle Standards
2025-14572 · significant
Environmental Protection AgencyProposed ruleAug 1, 2025
Extension of Deadlines in Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review Final Rule
2025-14531 · significant
Environmental Protection AgencyFinal ruleJul 31, 2025
Air Plan Approval; California; South Coast Air Quality Management District
2025-14528
Environmental Protection AgencyProposed ruleJul 31, 2025
Air Plan Approval; South Carolina; Second Planning Period Regional Haze Plan
2025-14476
Environmental Protection AgencyProposed ruleJul 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 AgencyFinal ruleJul 31, 2025
Air Plan Approval; New Jersey; Northern New Jersey and Southern New Jersey Counties' Second 10-Year Limited Maintenance Plan for the 2006 24-Hour PM2.5 Standard
2025-14470
Environmental Protection AgencyProposed ruleJul 31, 2025
Air Plan Approval; Rhode Island; Amendments to Motor Vehicle Inspection and Maintenance Program
2025-14105
Environmental Protection AgencyProposed ruleJul 28, 2025
Air Plan Approval; Washington; Regional Haze State Implementation Plan for the Second Implementation Period
2025-13957
Environmental Protection AgencyProposed ruleJul 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 AgencyProposed ruleJul 24, 2025
Air Plan Approval; New York; Ortho Clinical Diagnostics
2025-13937
Environmental Protection AgencyProposed ruleJul 24, 2025
Air Plan Approval; Texas; Reasonably Available Control Technology in the Dallas-Fort Worth Ozone Nonattainment Area
2025-13930
Environmental Protection AgencyProposed ruleJul 24, 2025
Air Plan Revisions; California; Mojave Desert Air Quality Management District; New Source Review; Stationary Source Permits
2025-13906
Environmental Protection AgencyProposed ruleJul 24, 2025
Interim Final Determination To Stay or Defer Sanctions; California; Mojave Desert Air Quality Management District
2025-13905
Environmental Protection AgencyFinal ruleJul 24, 2025
Air Plan Approval; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area
2025-13904
Environmental Protection AgencyProposed ruleJul 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 AgencyFinal ruleJul 24, 2025
Approval and Promulgation of Air Quality Implementation Plans; Maryland; Nitrogen Oxides Ozone Season Emissions Caps for Non-Trading Large Nitrogen Oxides Units; Amendments
2025-13891
Environmental Protection AgencyFinal ruleJul 24, 2025
Air Plan Approval; Connecticut; Plan for Inclusion of a Consent Order and Removal of State Orders
2025-13886
Environmental Protection AgencyFinal ruleJul 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 AgencyFinal ruleJul 16, 2025
Air Plan Partial Approval and Partial Disapproval; Colorado; Regional Haze Plan for the Second Implementation Period
2025-13342
Environmental Protection AgencyProposed ruleJul 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 AgencyProposed ruleJul 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 AgencyProposed ruleJul 16, 2025
Air Plan Approval; State of Utah; Utah PM2.5 State Implementation Plan Revisions
2025-13337
Environmental Protection AgencyProposed ruleJul 16, 2025
Air Plan Approval; New Jersey; Update to Materials Incorporated by Reference
2025-13333
Environmental Protection AgencyFinal ruleJul 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 AgencyFinal ruleJul 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 AgencyFinal ruleJul 16, 2025
Air Plan Approval; Minnesota; Exempt Source SIP Revision
2025-13327
Environmental Protection AgencyProposed ruleJul 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 AgencyProposed ruleJul 16, 2025
Air Plan Approval; California; Mojave Desert Air Quality Management District; Definition of Terms
2025-12867
Environmental Protection AgencyProposed ruleJul 10, 2025
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Oklahoma; Control of Emissions From Existing Other Solid Waste Incineration Units, Hospital/Medical/Infectious Waste Incinerator Units, and Commercial and Industrial Solid Waste Incineration Units
2025-12866
Environmental Protection AgencyProposed ruleJul 10, 2025
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; San Joaquin Valley
2025-12856
Environmental Protection AgencyProposed ruleJul 10, 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 AgencyFinal ruleJul 10, 2025
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
2025-12800
Environmental Protection AgencyProposed ruleJul 10, 2025
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer
2025-12798
Environmental Protection AgencyFinal ruleJul 10, 2025
National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks, and Coke Oven Batteries; Residual Risk and Technology Review, and Periodic Technology Review
2025-12626
Environmental Protection AgencyFinal ruleJul 8, 2025
Air Plan Approval; Ohio; Regional Haze Plan for the Second Implementation Period
2025-12526
Environmental Protection AgencyFinal ruleJul 8, 2025
Air Plan Approval; Florida; Revisions to Stationary Sources-Removal of Clean Air Interstate Rule Provisions
2025-12602
Environmental Protection AgencyFinal ruleJul 7, 2025
Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Oklahoma; Control of Emissions From Existing Municipal Solid Waste Landfills
2025-12599
Environmental Protection AgencyFinal ruleJul 7, 2025
Air Plan Approval; California; Revised Format for Nonregulatory Provisions
2025-12586
Environmental Protection AgencyFinal ruleJul 7, 2025
Air Plan Approval; Louisiana; Interstate Transport Requirements for the 2010 SO2 NAAQS
2025-12533
Environmental Protection AgencyFinal ruleJul 7, 2025
Air Plan Approval; West Virginia; Regional Haze State Implementation Plan for the Second Implementation Period
2025-12527
Environmental Protection AgencyFinal ruleJul 7, 2025
New Source Performance Standards; Delegation of Authority to Oklahoma
2025-12520
Environmental Protection AgencyProposed ruleJul 7, 2025
Air Plan Approval; Connecticut; 2014 and 2017 Periodic Emissions Inventory for 2008 8-Hour Ozone NAAQS
2025-12515
Environmental Protection AgencyProposed ruleJul 7, 2025
Air Plan Approval; Ohio; Moderate Attainment Plan Elements for the Cleveland Area for the 2015 Ozone Standard
2025-12512
Environmental Protection AgencyFinal ruleJul 7, 2025
Air Plan Approval; Oklahoma; Revisions to Air Pollution Control Rules
2025-12508
Environmental Protection AgencyProposed ruleJul 7, 2025
Renewable Fuel Standard (RFS) Program: Partial Waiver of the 2024 Cellulosic Biofuel Volume Requirement
2025-11153
Environmental Protection AgencyFinal ruleJul 7, 2025
National Priorities List
2025-12499
Environmental Protection AgencyFinal ruleJul 3, 2025
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review: Interim Final Rule
2025-12407
Environmental Protection AgencyFinal ruleJul 3, 2025
National Volatile Organic Compound Emission Standards for Aerosol Coatings: Interim Final Rule
2025-12323
Environmental Protection AgencyFinal ruleJul 2, 2025
Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Other Solid Waste Incineration Units Review
2025-11446
Environmental Protection AgencyFinal ruleJun 30, 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 AgencyProposed ruleJun 27, 2025
Air Plan Approval; Idaho; Update to Materials Incorporated by Reference
2025-11824
Environmental Protection AgencyFinal ruleJun 27, 2025
Air Plan Approval; Missouri; Definitions and Common Reference Tables
2025-11821
Environmental Protection AgencyProposed ruleJun 27, 2025
Air Plan Approval; California; San Joaquin Valley 1-Hour Ozone Area; Maintenance Plan and Redesignation Request
2025-11413
Environmental Protection AgencyProposed ruleJun 23, 2025

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