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Data / Federal rules / Carbon monoxide

Federal rules on carbon monoxide: 252 since January 2024

132 final rules and 120 proposed rules since January 2, 2024, 1 of them marked significant. 2 are open for comment now. Most come from the Environmental Protection Agency (252).

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; OR; Lane County Title 36 Rule
2026-20101
Environmental Protection AgencyProposed ruleNov 2

Every document, newest first

DocumentAgencyTypePublished
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
Air Plan Approval; GA; Removal of Nonattainment Area New Source Review
2026-20636
Environmental Protection AgencyFinal ruleOct 8
Air Plan Approval; Missouri; Construction Permit Exemptions
2026-20634
Environmental Protection AgencyFinal ruleOct 8
Air Plan Approval; OR; Lane County Title 36 Rule
2026-20101
Environmental Protection AgencyProposed ruleOct 1
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
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
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
Air Plan Approval; Mississippi; 2010 1-Hour SO2 NAAQS Transport Infrastructure
2026-17503
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; 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; SC; Department Name Change
2026-16990
Environmental Protection AgencyFinal ruleAug 20
Air Plan Approval; South Carolina; Minor Source Permit Program Revisions
2026-16937
Environmental Protection AgencyProposed ruleAug 19
Air Plan Approval; South Carolina; Minor Source Permit Program Revisions
2026-16930
Environmental Protection AgencyProposed ruleAug 19
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; New Hampshire; Repeal of Motor Vehicle Inspection and Maintenance Program
2026-16330
Environmental Protection AgencyProposed ruleAug 11
Air Plan Approval; Connecticut; Plan for Inclusion of a Consent Order No. 8383-Algonquin Gas Transmission, LLC and Negative Declaration for Rubber Tire Manufacturing Sources
2026-15986
Environmental Protection AgencyFinal ruleAug 6
Air Plan Approval; Rhode Island; Update to Materials Incorporated by Reference
2026-15493
Environmental Protection AgencyFinal ruleJul 31
Air Plan Approval; Pennsylvania; Redesignation of the Warren County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard
2026-15372
Environmental Protection AgencyProposed ruleJul 30
Air Plan Approval; Missouri; Construction Permit Exemptions
2026-15371
Environmental Protection AgencyProposed 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; 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
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; District of Columbia; Creation of Synthetic Minor Permit Program
2026-12898
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; OR; Update to Materials Incorporated by Reference
2026-12415
Environmental Protection AgencyFinal ruleJun 22
Clean Air Act Title V Operating Permit Program Revision; District of Columbia
2026-11170
Environmental Protection AgencyFinal ruleJun 4
Air Plan Approval; ID; Update to Materials Incorporated by Reference
2026-10738
Environmental Protection AgencyFinal ruleMay 29
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; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer
2026-07906
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; Missouri; Construction Permits Required
2026-07884
Environmental Protection AgencyFinal ruleApr 23
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; 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; 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
Clean Air Act Operating Permit Program Revision; California; Monterey Bay Air Resources District
2026-06443
Environmental Protection AgencyProposed ruleApr 2
Air Plan Approval; Oregon; 2024 Vehicle Inspection Program Updates
2026-06388
Environmental Protection AgencyFinal ruleApr 2
Air Plan Approval; Connecticut; New Source Review Permit Program State Plan Revision
2026-06384
Environmental Protection AgencyFinal ruleApr 2
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
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
Air Plan Approval; OR; Klamath Falls PM2.5 Redesignation to Attainment and Maintenance Plan
2026-04333
Environmental Protection AgencyProposed 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; Missouri; Reporting Emission Data, Emission Fees, and Process Information
2026-03888
Environmental Protection AgencyFinal ruleFeb 26
Air Plan Approval; AK; Updates to Materials Incorporated by Reference
2026-02478
Environmental Protection AgencyFinal ruleFeb 9
Air Plan Revisions; California; Heavy-Duty Vehicle Inspection and Maintenance Program
2026-02350
Environmental Protection AgencyFinal ruleFeb 6
Air Plan Approval; OR; Lane County Permitting Rule Revisions
2026-01735
Environmental Protection AgencyFinal ruleJan 29
Air Plan Disapproval; Colorado; Regional Haze Plan for the Second Implementation Period
2026-01413
Environmental Protection AgencyFinal ruleJan 26
Air Plan Approval; Montana; Revisions to Western Sugar Stipulation
2026-01324
Environmental Protection AgencyProposed ruleJan 23
Air Plan Approval; Ohio; Ohio Permit Rules Revisions
2026-00258
Environmental Protection AgencyProposed ruleJan 9
Air Plan Approval; New Hampshire; Updates to Materials Incorporated by Reference
2026-00249
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; Colorado; Revisions to Colorado Procedural Rules and Common Provisions Regulation
2025-24141
Environmental Protection AgencyFinal ruleJan 2
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; Connecticut; Plan Submittals for the 2008 Ozone National Ambient Air Quality Standard
2025-22595
Environmental Protection AgencyFinal ruleDec 11, 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; 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
Air Plan Approval; Minnesota; Exempt Source SIP Revision
2025-20492
Environmental Protection AgencyFinal ruleNov 20, 2025
Air Plan Approval; Rhode Island; Decommissioning of Stage II Vapor Recovery Systems
2025-20458
Environmental Protection AgencyFinal 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; District of Columbia; Creation of Synthetic Minor Permit Program
2025-20416
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
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; 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; 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; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP Provisions
2025-19989
Environmental Protection AgencyProposed ruleNov 17, 2025
Air Plan Approval; Utah; Interstate Transport of Air Pollution for the 2008 8-Hour Ozone National Ambient Air Quality Standard
2025-19824
Environmental Protection AgencyFinal ruleNov 10, 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
Air Plan Approval; California; San Joaquin Valley 1-Hour Ozone Area; Maintenance Plan and Redesignation Request
2025-18637
Environmental Protection AgencyFinal ruleSep 25, 2025
Air Plan Approval; Oregon; 2024 Vehicle Inspection Program Updates
2025-18629
Environmental Protection AgencyProposed 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; Missouri; Definitions and Common Reference Tables
2025-18568
Environmental Protection AgencyFinal ruleSep 25, 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 Approval; Wyoming; R-35 Wyoming Air Quality Standards and Regulations Rule Package
2025-17486
Environmental Protection AgencyFinal ruleSep 11, 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
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
Air Plan Approval; GA; Removal of Nonattainment Area New Source Review
2025-16723
Environmental Protection AgencyProposed ruleSep 2, 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; California; Mojave Desert Air Quality Management District; Internal Combustion Engines
2025-16466
Environmental Protection AgencyFinal ruleAug 28, 2025
Air Plan Revisions; California; Heavy-Duty Vehicle Inspection and Maintenance Program
2025-16325
Environmental Protection AgencyProposed ruleAug 26, 2025
Air Plan Approval; WA; Update to Materials Incorporated by Reference
2025-15992
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; North Carolina; Removal of Emissions Exemptions
2025-15557
Environmental Protection AgencyProposed ruleAug 15, 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; 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; 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; OR; Update to Materials Incorporated by Reference
2025-14971
Environmental Protection AgencyFinal ruleAug 7, 2025
Air Plan Approval; South Carolina; Second Planning Period Regional Haze Plan
2025-14476
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; 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; 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
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 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
Air Plan Approval; State of Utah; Utah PM2.5 State Implementation Plan Revisions
2025-13337
Environmental Protection AgencyProposed 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; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer
2025-12798
Environmental Protection AgencyFinal ruleJul 10, 2025
Air Plan Approval; Florida; Revisions to Stationary Sources-Removal of Clean Air Interstate Rule Provisions
2025-12602
Environmental Protection AgencyFinal 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; 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; Colorado; Interim Final Determination to Stay and Defer Sanctions in the Denver Metro/North Front Range 2008 Ozone Nonattainment Area
2025-11266
Environmental Protection AgencyFinal ruleJun 18, 2025
Air Plan Approval; Colorado; Serious Attainment Plan RACT Requirements for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area
2025-11263
Environmental Protection AgencyProposed ruleJun 18, 2025
Air Plan Approval; West Virginia; 2024 Amendments to West Virginia's Ambient Air Quality Standards
2025-10548
Environmental Protection AgencyProposed ruleJun 11, 2025
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program Certification
2025-10546
Environmental Protection AgencyProposed ruleJun 11, 2025
Air Plan Approval; Florida; Second Planning Period Regional Haze Plan
2025-10035
Environmental Protection AgencyFinal ruleJun 5, 2025
Air Plan Approval; IA; Alter Metal Recycling Permit Modification
2025-10038
Environmental Protection AgencyProposed ruleJun 3, 2025
Air Plan Approval; Oregon; Lane Regional Air Protection Agency, Outdoor Burning
2025-09324
Environmental Protection AgencyProposed ruleMay 23, 2025
Air Plan Approval; California; Mojave Desert Air Quality Management District; Oxides of Nitrogen
2025-08875
Environmental Protection AgencyFinal ruleMay 19, 2025
Air Plan Approval; Texas; New Source Review Updates for Project Emissions Accounting
2025-08734
Environmental Protection AgencyFinal ruleMay 19, 2025
Air Plan Approval; South Dakota; Regional Haze Plan for the Second Implementation Period
2025-08072
Environmental Protection AgencyProposed ruleMay 14, 2025
Air Plan Approval; WA; Southwest Clean Air Agency; Revisions to Excess Emissions, Startup, Shutdown, and General Requirements
2025-07846
Environmental Protection AgencyFinal ruleMay 9, 2025
Air Plan Approval; Missouri; Control of Emissions During Petroleum Liquid Storage, Loading, and Transfer
2025-08074
Environmental Protection AgencyProposed ruleMay 8, 2025
Air Plan Approval; Colorado; Interim Final Determination To Stay and Defer Sanctions in the Denver Metro/North Front Range 2008 Ozone Nonattainment Area
2025-07938
Environmental Protection AgencyFinal ruleMay 8, 2025
Air Plan Approval; Colorado; Serious Attainment Plan Contingency Measures for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area
2025-07937
Environmental Protection AgencyProposed ruleMay 8, 2025
Air Plan Approval; Kansas; Annual Emission Inventory and Fees
2025-07261
Environmental Protection AgencyFinal ruleApr 28, 2025
Air Plan Approval; Pennsylvania; Redesignation of the Allegheny County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard
2025-07255
Environmental Protection AgencyFinal ruleApr 28, 2025
Air Plan Approval; Washington; Spokane Regional Clean Air Agency, General Air Quality Regulations
2025-06247
Environmental Protection AgencyFinal ruleApr 16, 2025
Air Plan Approval; Pennsylvania; Redesignation Request and Associated Maintenance Plan for the Liberty-Clairton Area for the 1997 Annual and 2006 24-Hour Fine Particulate Matter Standard and Maintenance Plan for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard
2025-05921
Environmental Protection AgencyProposed ruleApr 7, 2025
Air Plan Approval; California; State Implementation Plan Revision for Chico, Modesto, and Stockton Carbon Monoxide Maintenance Areas
2025-05369
Environmental Protection AgencyProposed ruleMar 31, 2025
Air Plan Approval; Florida; Revisions to Stationary Sources-Removal of Clean Air Interstate Rule Provisions
2025-05382
Environmental Protection AgencyProposed ruleMar 28, 2025
Air Plan Approval; AK, Fairbanks North Star Borough; 2006 24-Hour PM2.5 Serious Area and 189(d) Plan
2025-04908
Environmental Protection AgencyProposed ruleMar 24, 2025
Air Plan Disapproval; West Virginia; Regional Haze State Implementation Plan for the Second Implementation Period
2025-01101
Environmental Protection AgencyProposed ruleJan 21, 2025
Air Plan Approval; Ohio; Withdrawal of Technical Amendment
2025-00968
Environmental Protection AgencyFinal ruleJan 21, 2025
Air Plan Partial Approval and Partial Disapproval; South Carolina; Minor Source Permit Program Revisions
2025-00438
Environmental Protection AgencyProposed ruleJan 21, 2025
Air Plan Approval; AK; Updates to Materials Incorporated by Reference
2025-01120
Environmental Protection AgencyFinal ruleJan 17, 2025
Air Plan Approval; Washington; Olympic Region Clean Air Agency, Recreational Fires
2025-00559
Environmental Protection AgencyFinal ruleJan 17, 2025
Revisions to the Federal Implementation Plan for the Billings/Laurel, Montana, Sulfur Dioxide Area
2025-00220
Environmental Protection AgencyFinal ruleJan 17, 2025
Air Plan Approval; Montana; Missoula, Montana Oxygenated Fuels Program Removal, Carbon Monoxide, Limited Maintenance Plan
2025-00380
Environmental Protection AgencyFinal ruleJan 16, 2025
Air Plan Approval; Kansas; Annual Emission Inventory and Fees
2024-31626
Environmental Protection AgencyProposed ruleJan 15, 2025
Interim Final Determination To Defer Sanctions; AK, Fairbanks North Star Borough
2024-30649
Environmental Protection AgencyFinal ruleJan 8, 2025
Air Plan Approval; AK, Fairbanks North Star Borough; 2006 24-Hour PM2.5 Serious Area and 189(d) Plan
2024-30648
Environmental Protection AgencyProposed ruleJan 8, 2025
Outer Continental Shelf Air Regulations; Amendment to State Requirements Incorporated by Reference; Massachusetts
2024-30800
Environmental Protection AgencyFinal ruleDec 27, 2024
Air Plan Approval; Florida; Second Planning Period Regional Haze Plan
2024-30751
Environmental Protection AgencyProposed ruleDec 27, 2024
Air Plan Approval; KY; Revisions to Jefferson County Control of Open Burning
2024-30741
Environmental Protection AgencyFinal ruleDec 27, 2024
Air Plan Approval; Indiana; Update to CFR References
2024-30729
Environmental Protection AgencyFinal ruleDec 27, 2024
Air Plan Approval; Revisions to Colorado Common Provisions Regulation
2024-30695
Environmental Protection AgencyFinal ruleDec 27, 2024
Air Plan Approval; WA; Excess Emissions, Startup, Shutdown, and Malfunction Revisions, Energy Facility Site Evaluation Council
2024-30536
Environmental Protection AgencyFinal ruleDec 27, 2024
Air Plan Approval; California; Mojave Desert Air Quality Management District; Oxides of Nitrogen
2024-30413
Environmental Protection AgencyProposed ruleDec 26, 2024
Determination To Defer Sanctions; California; Mojave Desert Air Quality Management District
2024-30409
Environmental Protection AgencyFinal ruleDec 26, 2024
Air Plan Approval; Georgia; Update to Materials Incorporated by Reference
2024-30253
Environmental Protection AgencyFinal ruleDec 20, 2024
Air Plan Disapproval; Texas; Control of Air Pollution From Visible Emissions and Particulate Matter
2024-29956
Environmental Protection AgencyFinal ruleDec 20, 2024
Redesignation of Portions of Westmoreland and Cambria Counties, Pennsylvania for the 2010 Sulfur Dioxide (SO2) National Ambient Air Quality Standards (NAAQS)
2024-29229
Environmental Protection AgencyFinal ruleDec 17, 2024
Air Plan Approval; Pennsylvania; Redesignation of the Allegheny County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard
2024-28536
Environmental Protection AgencyProposed ruleDec 11, 2024
Air Plan Approval; WA; Southwest Clean Air Agency; Revisions to Excess Emissions, Startup, Shutdown, and General Requirements
2024-28804
Environmental Protection AgencyProposed ruleDec 10, 2024
Air Plan Approval; ID; Revisions to Air Quality Regulations
2024-28364
Environmental Protection AgencyFinal ruleDec 5, 2024
Air Plan Partial Approval and Partial Disapproval; Wyoming; Regional Haze Plan for the Second Implementation Period
2024-27942
Environmental Protection AgencyFinal ruleDec 2, 2024
Air Plan Partial Approval and Partial Disapproval; Utah; Regional Haze State Implementation Plan for the Second Implementation Period; Air Plan Disapproval; Utah; Prong 4 (Visibility) for the 2015 8-Hour Ozone National Ambient Air Quality Standard
2024-27941
Environmental Protection AgencyFinal ruleDec 2, 2024
Air Plan Partial Approval and Partial Disapproval; North Dakota; Regional Haze State Implementation Plan for the Second Implementation Period
2024-27940
Environmental Protection AgencyFinal ruleDec 2, 2024
Guideline on Air Quality Models; Enhancements to the AERMOD Dispersion Modeling System
2024-27636
Environmental Protection AgencyFinal ruleNov 29, 2024
Air Plan Approval; Shelby County, Tennessee; Revisions to Startup, Shutdown, and Malfunction Rules
2024-26928
Environmental Protection AgencyFinal ruleNov 20, 2024
Air Plan Approval; ID; Update to Materials Incorporated by Reference
2024-26506
Environmental Protection AgencyFinal ruleNov 18, 2024
Air Plan Approval; Washington; Spokane Regional Clean Air Agency, General Air Quality Regulations
2024-26171
Environmental Protection AgencyProposed ruleNov 14, 2024
Approval and Promulgation of Air Quality Implementation Plans; New Hampshire; Regional Haze State Implementation Plan for the Second Implementation Period
2024-25679
Environmental Protection AgencyFinal ruleNov 7, 2024
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program
2024-25460
Environmental Protection AgencyFinal ruleNov 4, 2024
Air Plan Approval; Forsyth County, North Carolina; Removal of Excess Emissions Provisions
2024-25392
Environmental Protection AgencyFinal ruleOct 31, 2024
Air Plan Approval; KY; Revisions to Jefferson County Control of Open Burning
2024-25244
Environmental Protection AgencyProposed ruleOct 31, 2024
Air Plan Approval; Revisions to Colorado Common Provisions Regulation
2024-25228
Environmental Protection AgencyProposed ruleOct 30, 2024
Air Plan Approval; Wisconsin; SIP Alignment Revision
2024-25032
Environmental Protection AgencyFinal ruleOct 29, 2024
Air Plan Approval; Washington; Olympic Region Clean Air Agency, Recreational Fires
2024-24714
Environmental Protection AgencyProposed ruleOct 24, 2024
Air Plan Approval; WA; Excess Emissions, Startup, Shutdown, and Malfunction Revisions, Energy Facility Site Evaluation Council
2024-24211
Environmental Protection AgencyProposed ruleOct 22, 2024
Air Quality Plans; California; San Diego County Air Pollution Control District; Permit Program
2024-24223
Environmental Protection AgencyFinal ruleOct 21, 2024
Air Plan Approval; Montana; Missoula, Montana Oxygenated Fuels Program Removal, Carbon Monoxide, Limited Maintenance Plan
2024-23589
Environmental Protection AgencyProposed ruleOct 15, 2024
Revisions to the Federal Implementation Plan for the Billings/Laurel, Montana, Sulfur Dioxide Area
2024-23568
Environmental Protection AgencyProposed ruleOct 15, 2024
Air Plan Approval; Texas; New Source Review Updates for Project Emissions Accounting
2024-23282
Environmental Protection AgencyProposed ruleOct 11, 2024
Approval and Promulgation of Implementation Plans; California; California Mobile Source Regulations
2024-23270
Environmental Protection AgencyProposed ruleOct 11, 2024
Air Plan Approval; OR; Regional Haze Plan for the Second Implementation Period
2024-22603
Environmental Protection AgencyFinal ruleOct 8, 2024
Air Plan Approval; FL; Surface Coating of Miscellaneous Metal Parts and Products Amendments
2024-22135
Environmental Protection AgencyFinal ruleSep 27, 2024
Air Plan Approval; Montana; Missoula, Montana, Air Rule Revisions
2024-20997
Environmental Protection AgencyProposed ruleSep 17, 2024
Air Plan Approval; New Hampshire; Ambient Air Quality Standards
2024-20721
Environmental Protection AgencyFinal ruleSep 13, 2024
Air Plan Approval; Shelby County, Tennessee; Revisions To Startup, Shutdown, and Malfunction Rules
2024-20669
Environmental Protection AgencyProposed ruleSep 12, 2024
Air Plan Approval; Forsyth County, North Carolina; Removal of Excess Emissions Provisions
2024-20666
Environmental Protection AgencyProposed ruleSep 12, 2024
Outer Continental Shelf Air Regulations; Amendment to State Requirements Incorporated; Massachusetts
2024-20119
Environmental Protection AgencyProposed ruleSep 11, 2024
Air Plan Disapproval; Texas; Control of Air Pollution From Visible Emissions and Particulate Matter
2024-19600
Environmental Protection AgencyProposed ruleSep 3, 2024
Air Plan Revisions; Arizona; Maricopa County Air Quality Department
2024-17500
Environmental Protection AgencyFinal ruleAug 20, 2024
Air Plan Partial Approval and Partial Disapproval; Utah; Regional Haze State Implementation Plan for the Second Implementation Period; Air Plan Disapproval; Utah; Interstate Transport of Air Pollution for the 2015 8-Hour Ozone National Ambient Air Quality Standards
2024-18462
Environmental Protection AgencyProposed ruleAug 19, 2024
Air Plan Approval; WA; Update to Materials Incorporated by Reference
2024-16953
Environmental Protection AgencyFinal ruleAug 19, 2024
Air Plan Approval; Indiana; Update to CFR References
2024-17913
Environmental Protection AgencyProposed ruleAug 16, 2024
Air Plan Approval; Delaware; Motor Vehicle Inspection and Maintenance Program
2024-18173
Environmental Protection AgencyProposed ruleAug 15, 2024
Air Plan Approval; North Dakota; Approval of Air Quality Implementation Plans; Regional Haze State Implementation Plan; Regional Haze Five Year Progress Report and Nitrogen Oxides Best Available Retrofit Technology Determination for Coal Creek Station for the First Implementation Period
2024-17471
Environmental Protection AgencyProposed ruleAug 14, 2024
Air Plan Approval; Kansas; Regional Haze
2024-17182
Environmental Protection AgencyFinal ruleAug 7, 2024
Air Plan Approval and Conditional Approval; Colorado; Regulation Numbers 7 and 21 and RACT Requirements for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area
2024-17091
Environmental Protection AgencyProposed ruleAug 6, 2024
Air Plan Partial Approval and Partial Disapproval; Wyoming; Regional Haze Plan for the Second Implementation Period
2024-16718
Environmental Protection AgencyProposed ruleAug 1, 2024
Clean Air Act Title V Operating Permit Program Revision; West Virginia
2024-16568
Environmental Protection AgencyFinal ruleJul 30, 2024
Air Plan Approval; FL; Surface Coating of Miscellaneous Metal Parts and Products Amendments
2024-16542
Environmental Protection AgencyProposed ruleJul 30, 2024
Clean Air Act Reclassification; Colorado; Reclassification of the Denver Metro/North Front Range 2015 Ozone Nonattainment Area to Serious
2024-16123
Environmental Protection AgencyFinal ruleJul 24, 2024
Air Plan Approval; OR; Permitting Rule Revisions
2024-15748
Environmental Protection AgencyFinal ruleJul 23, 2024
Air Plan Approval; Colorado; 2017 Base Year Inventory and Emission Statement Rule Marginal Nonattainment Requirements, Revisions to Regulation 3
2024-15953
Environmental Protection AgencyFinal ruleJul 22, 2024
Air Plan Approval; GA; Revisions to the State Implementation Plan Gasoline Transport Vehicles and Vapor Collection Systems Rule
2024-15397
Environmental Protection AgencyFinal ruleJul 16, 2024
Air Plan Approval; Connecticut; Low Emissions Vehicles Program
2024-15225
Environmental Protection AgencyFinal ruleJul 15, 2024
Air Plan Approval; New Hampshire; Ambient Air Quality Standards
2024-14990
Environmental Protection AgencyProposed ruleJul 11, 2024
Air Plan Partial Approval and Partial Disapproval; North Dakota; Regional Haze State Implementation Plan for the Second Implementation Period
2024-14761
Environmental Protection AgencyProposed ruleJul 10, 2024
Approval and Promulgation of Air Quality Implementation Plans; Massachusetts; Regional Haze State Implementation Plan for the Second Implementation Period
2024-14632
Environmental Protection AgencyFinal ruleJul 8, 2024
Air Plan Approval; Connecticut; Source Monitoring, Record Keeping and Reporting
2024-14620
Environmental Protection AgencyFinal ruleJul 8, 2024
Air Plan Partial Approval and Partial Disapproval; Missouri; Regional Haze
2024-14612
Environmental Protection AgencyProposed ruleJul 3, 2024
Air Plan Approval; State of Utah; Utah State Implementation Plan Revisions
2024-14136
Environmental Protection AgencyFinal ruleJul 1, 2024
Air Plan Approval; Iowa; Linn County Ordinances
2024-14119
Environmental Protection AgencyFinal ruleJul 1, 2024
Air Plan Approval; GA; Revisions to the State Implementation Plan Gasoline Transport Vehicles and Vapor Collection System Rule
2024-10713
Environmental Protection AgencyProposed ruleMay 17, 2024
Air Plan Approval; Wisconsin; SIP Alignment Revision
2024-10539
Environmental Protection AgencyProposed ruleMay 16, 2024
Air Plan Approval; Delaware; Amendments to Delaware's Requirements for Public Notice of Certain Permits
2024-09924
Environmental Protection AgencyFinal ruleMay 16, 2024
Air Plan Approval; KY; Revisions to Jefferson County Definitions
2024-09730
Environmental Protection AgencyFinal ruleMay 13, 2024
Air Plan Approval; New Hampshire; Amendments to Motor Vehicle Inspection and Maintenance Program Regulation
2024-08928
Environmental Protection AgencyFinal ruleApr 29, 2024
Air Plan Approval; Michigan; Revisions to Part 1 and 2 Rules
2024-08798
Environmental Protection AgencyProposed ruleApr 25, 2024
Air Plan Approval; IA; Linn County Ordinances
2024-08283
Environmental Protection AgencyProposed ruleApr 18, 2024
Air Plan Revisions; Arizona; Maricopa County Air Quality Department
2024-07954
Environmental Protection AgencyProposed ruleApr 16, 2024
Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter
2024-07397 ยท significant
Environmental Protection AgencyProposed ruleApr 15, 2024
Air Plan Approval; Georgia; Gasoline Dispensing Facilities
2024-07703
Environmental Protection AgencyProposed ruleApr 12, 2024
Air Plan Approval; North Carolina; Revision to Approved Motor Vehicle Emissions Budgets
2024-07701
Environmental Protection AgencyProposed ruleApr 12, 2024
Air Plan Approval; Colorado; 2017 Base Year Inventory and Emission Statement Rule Marginal Nonattainment Requirements, Revisions to Regulation 3
2024-07584
Environmental Protection AgencyProposed ruleApr 10, 2024
Air Plan Approval; Wyoming; Revisions to Regional Haze State Implementation Plan
2024-07414
Environmental Protection AgencyProposed ruleApr 10, 2024
Clean Air Act Title V Operating Permit Program Revision; West Virginia
2024-05894
Environmental Protection AgencyProposed ruleMar 21, 2024
Air Plan Approval; New Hampshire; Single Source Order for PAK Solutions
2024-05072
Environmental Protection AgencyFinal ruleMar 11, 2024
Determination To Defer Sanctions; California; South Coast Air Quality Management District
2024-04921
Environmental Protection AgencyFinal ruleMar 8, 2024
Air Plan Approval; KY; 2015 8-Hour Ozone Nonattainment New Source Review Permit Program Requirements and Rule Revision for Jefferson County
2024-04782
Environmental Protection AgencyFinal ruleMar 7, 2024
Air Plan Approval; KY; Revisions to Jefferson County Definitions
2024-04773
Environmental Protection AgencyProposed ruleMar 7, 2024
Reconsideration of the National Ambient Air Quality Standards for Particulate Matter
2024-02637
Environmental Protection AgencyFinal ruleMar 6, 2024
Air Plan Approval; Oklahoma; Updates to the State Implementation Plan Incorporation by Reference Provisions
2024-04103
Environmental Protection AgencyFinal ruleMar 1, 2024
Air Plan Approval; Connecticut; Source Monitoring, Record Keeping and Reporting
2024-04133
Environmental Protection AgencyProposed ruleFeb 29, 2024
Air Plan Approval; Ohio; Withdrawal of Technical Amendment
2024-03555
Environmental Protection AgencyProposed ruleFeb 22, 2024
Air Plan Approval and Operating Permit Program Approval; Connecticut; Revision to Definitions
2024-02700
Environmental Protection AgencyFinal ruleFeb 12, 2024
Air Plan Approval; California; California Air Resources Board; Volatile Organic Compounds
2024-02659
Environmental Protection AgencyFinal ruleFeb 9, 2024
Air Plan Approval; Georgia; Vehicle Inspection and Maintenance Program
2024-02521
Environmental Protection AgencyFinal ruleFeb 9, 2024
Air Plan Approval; GA; Miscellaneous Rule Revision
2024-02321
Environmental Protection AgencyFinal ruleFeb 6, 2024
Air Quality Plans; Approvals and Promulgations: California; Amador Air District; New Source Review
2024-02164
Environmental Protection AgencyFinal ruleFeb 6, 2024
Air Plan Approval; Pennsylvania; Allegheny County Open Burning Revision and Addition of Mon Valley Air Pollution Episode Requirements
2024-02215
Environmental Protection AgencyProposed ruleFeb 5, 2024
Air Plan Approval; New Hampshire; Amendments to Motor Vehicle Inspection and Maintenance Program Regulation
2024-01937
Environmental Protection AgencyProposed ruleJan 31, 2024
Air Plan Approval; KY; 2015 8-Hour Ozone Nonattainment New Source Review Permit Program Requirements and Rule Revision for Jefferson County
2024-01029
Environmental Protection AgencyProposed ruleJan 19, 2024
Air Plan Approval; Illinois; NAAQS Update
2024-00658
Environmental Protection AgencyFinal ruleJan 17, 2024
Outer Continental Shelf Air Regulations; Consistency Update for Maryland
2023-28839
Environmental Protection AgencyFinal ruleJan 4, 2024
Air Plan Disapproval; Kansas; Regional Haze
2023-28384
Environmental Protection AgencyProposed ruleJan 2, 2024

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