Federal rules on nitrogen oxides: 195 since January 2024

Name: Federal rules on nitrogen oxides: 195 since January 2024
Creator: SpecStream
License: https://creativecommons.org/licenses/by/4.0/

113 final rules and 82 proposed rules since January 2, 2024, 1 of them marked significant. 2 are open for comment now. Most come from the Environmental Protection Agency (195).

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

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Open for comment

Document	Agency	Type	Comments due
Air Quality Plan; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits-Rule 204 2026-20612	Environmental Protection Agency	Proposed rule	Nov 9
New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Northwest Clean Air Agency, Washington State 2026-21383	Environmental Protection Agency	Proposed rule	Nov 18

Every document, newest first

Document	Agency	Type	Published
New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Northwest Clean Air Agency, Washington State 2026-21383	Environmental Protection Agency	Proposed rule	Oct 19
Air Plan Approval; Michigan; Clean Data Determination for the Berrien, MI and Muskegon, MI Areas for the 2015 Ozone Standards 2026-20736	Environmental Protection Agency	Final rule	Oct 9
Air Quality Plan; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits-Rule 204 2026-20612	Environmental Protection Agency	Proposed rule	Oct 8
Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2026-20097	Environmental Protection Agency	Final rule	Oct 1
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines 2026-20096	Environmental Protection Agency	Final rule	Oct 1
Clean Data Determination; 1997 8-Hour Ozone Standards; California; Sacramento Metro Area 2026-18755	Environmental Protection Agency	Proposed rule	Sep 14
Approval and Promulgation of Implementation Plans; California; San Joaquin Valley, Revisions to Motor Vehicle Emissions Budgets for Ozone 2026-18748	Environmental Protection Agency	Final rule	Sep 14
Air Plan Approvals; Indiana; Prong 4 (Visibility) for the 2015 Ozone National Ambient Air Quality Standard 2026-18334	Environmental Protection Agency	Final rule	Sep 9
Air Plan Approval; Michigan; 2015 Ozone Moderate Reasonably Available Control Technology 2026-17486	Environmental Protection Agency	Final rule	Aug 27
Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas 2026-16986	Environmental Protection Agency	Final rule	Aug 20
Air Plan Approval; Illinois; Clean Data Determination for the Illinois Portion of the St. Louis Area for the 2015 Ozone Standard 2026-16514	Environmental Protection Agency	Final rule	Aug 13
Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley 2026-16511	Environmental Protection Agency	Final rule	Aug 13
Air Quality Plan; Arizona; Maricopa County Air Quality Department; Gasoline Loading 2026-16335	Environmental Protection Agency	Proposed rule	Aug 11
Determination To Defer Sanctions; Arizona; Maricopa County Air Quality Department; Gasoline Loading 2026-16334	Environmental Protection Agency	Final rule	Aug 11
Air Plan Approval; Illinois; 2015 Ozone Moderate and Serious Reasonably Available Control Technology Update 2026-16001	Environmental Protection Agency	Proposed rule	Aug 6
Air Plan Approval; California; San Joaquin Valley Air Pollution Control District 2026-15377	Environmental Protection Agency	Final rule	Jul 30
Air Plan Approval; Wisconsin; Source-Specific Air Quality Implementation Plan; Oak Creek Power Plant 2026-14282	Environmental Protection Agency	Proposed rule	Jul 15
Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines 2026-14260	Environmental Protection Agency	Proposed rule	Jul 15
Approval and Promulgation of Implementation Plans; California; San Joaquin Valley; Revisions to Motor Vehicle Emissions Budgets for Ozone 2026-13845	Environmental Protection Agency	Proposed rule	Jul 9
Air Plan Approval; Ohio; Redesignation of the Cleveland, OH Area to Attainment of the 2015 Ozone Standard 2026-13027	Environmental Protection Agency	Final rule	Jun 29
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT and SIP Strengthening for Ohio 2026-12921	Environmental Protection Agency	Final rule	Jun 26
Air Plan Approval; Ohio; Source-Specific Non-CTG RACT 2026-12920	Environmental Protection Agency	Final rule	Jun 26
Ozone Reclassification State Implementation Plan Rule 2026-11843	Environmental Protection Agency	Proposed rule	Jun 12
Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction 2026-11731	Environmental Protection Agency	Final rule	Jun 11
Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Regional Haze Federal Implementation Plan 2026-11436	Environmental Protection Agency	Proposed rule	Jun 8
Air Plan Approval; Minnesota; Revision to Taconite Federal Implementation Plan 2026-11432	Environmental Protection Agency	Final rule	Jun 8
Conditional Approval; Contingency Measure State Implementation Plan for the 2008 Ozone Standards; San Joaquin Valley, California 2026-11168	Environmental Protection Agency	Final rule	Jun 4
Air Plan Approval; Michigan; Determination of Attainment by the Attainment Date for the 2015 Ozone Standards 2026-10767	Environmental Protection Agency	Proposed rule	May 29
Air Plan Approval; Ohio; Removal of Air Nuisance Rule 2026-10643	Environmental Protection Agency	Proposed rule	May 28
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Gila County Reasonably Available Control Technology 2026-10280	Environmental Protection Agency	Final rule	May 22
Air Plan Approval; Montana; Revisions to Western Sugar Stipulation 2026-09619	Environmental Protection Agency	Final rule	May 14
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements 2026-09616	Environmental Protection Agency	Final rule	May 14
Air Plan Approval; Ohio; Clean Data Determination for the Cleveland, Ohio Area for the 2015 Ozone Standard 2026-09614	Environmental Protection Agency	Final rule	May 14
Air Plan Approval; Illinois; Moderate Attainment Plan Elements for the Chicago and Metro East Areas for the 2015 Ozone Standard 2026-09613	Environmental Protection Agency	Final rule	May 14
Air Plan Approval; Indiana; Indiana NOX Emissions Monitoring 2026-09612	Environmental Protection Agency	Final rule	May 14
Air Quality Plan; California; San Diego County Air Pollution Control District; Landfill Flares 2026-09055	Environmental Protection Agency	Proposed rule	May 7
Utah; Northern Wasatch Front; 2015 8-Hour Ozone National Ambient Air Quality Standards; Reconsideration and Repeal of Finding of Failure To Attain and Reclassification to a Serious Nonattainment Area; Determination of Attainment by the Moderate Attainment Date But for International Emissions 2026-08372	Environmental Protection Agency	Proposed rule	Apr 30
Utah; Uinta Basin; 2015 8-Hour Ozone National Ambient Air Quality Standard; Reconsideration and Repeal of Finding of Failure To Attain and Reclassification to a Moderate Nonattainment Area; Extension of the Attainment Date and Determination of Attainment by the Marginal Attainment Date 2026-07904	Environmental Protection Agency	Proposed rule	Apr 23
Air Plan Revisions; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits 2026-07405	Environmental Protection Agency	Proposed rule	Apr 16
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Portland Cement Kilns 2026-07398	Environmental Protection Agency	Final rule	Apr 16
Air Plan Approvals; Indiana; Prong 4 (Visibility) for the 2015 Ozone National Ambient Air Quality Standard 2026-06942	Environmental Protection Agency	Proposed rule	Apr 10
Air Plan Approval; Colorado; Serious Attainment Plan Contingency Measures and RACT Requirements for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area 2026-06837	Environmental Protection Agency	Final rule	Apr 9
Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas 2026-06442	Environmental Protection Agency	Proposed rule	Apr 2
Finding of Failure To Attain the 2006 24-Hour PM2.5 Standards; California; San Joaquin Valley; Error Correction 2026-06441	Environmental Protection Agency	Proposed rule	Apr 2
Air Plan Approval; Ohio; Ohio Permit Rules Revisions 2026-06398	Environmental Protection Agency	Final rule	Apr 2
Air Quality Plan; California; Mojave Desert Air Quality Management District; Replacing Outdated Requirements; Correction 2026-06386	Environmental Protection Agency	Final rule	Apr 2
Determination of Attainment by the Attainment Date But for International Emissions for the 2015 Ozone National Ambient Air Quality Standards; Phoenix-Mesa Nonattainment Area, Arizona 2026-05601	Environmental Protection Agency	Final rule	Mar 23
Air Plan Approval; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area 2026-05596	Environmental Protection Agency	Final rule	Mar 23
Approval of Clean Air Plans; San Joaquin Valley, California; Contingency Measures for 1997 Ozone Standards 2026-05592	Environmental Protection Agency	Final rule	Mar 23
Air Plan Approval; Michigan; Clean Data Determination for the Berrien, MI and Muskegon, MI Areas for the 2015 Ozone Standards 2026-04851	Environmental Protection Agency	Proposed rule	Mar 12
Air Plan Approval; Michigan; 2015 Ozone Moderate Reasonably Available Control Technology 2026-03937	Environmental Protection Agency	Proposed rule	Feb 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 Agency	Proposed rule	Feb 27
Air Plan Approval; Ohio; Clean Data Determination for the Cleveland, Ohio Area for the 2015 Ozone Standard 2026-03934	Environmental Protection Agency	Proposed rule	Feb 27
Air Plan Approval; Michigan; Moderate Attainment Plan Elements for the Allegan County, Berrien County, and Muskegon County Areas for the 2015 Ozone Standard 2026-03880	Environmental Protection Agency	Final rule	Feb 26
Air Plan Approval; Illinois; Clean Data Determination for the Illinois Portion of the St. Louis Area for the 2015 Ozone Standard 2026-03846	Environmental Protection Agency	Proposed rule	Feb 26
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Gila County Reasonably Available Control Technology 2026-02845	Environmental Protection Agency	Proposed rule	Feb 12
Air Plan Approval; Ohio; Second Maintenance Plan for 2008 Ozone NAAQS 2026-02822	Environmental Protection Agency	Final rule	Feb 12
Air Plan Approval; Connecticut; Revised Format for Materials Incorporated by Reference 2026-02477	Environmental Protection Agency	Final rule	Feb 9
Air Plan Revisions; California; Heavy-Duty Vehicle Inspection and Maintenance Program 2026-02350	Environmental Protection Agency	Final rule	Feb 6
Interstate Transport Plan Review for the 2015 Ozone NAAQS 2026-01844 · significant	Environmental Protection Agency	Proposed rule	Jan 30
Determination of Attainment by the Attainment Date and Clean Data Determination; California, San Joaquin Valley 1997 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2026-01766	Environmental Protection Agency	Final rule	Jan 29
Air Plan Approval; Ohio; 2015 Ozone Moderate Reasonably Available Control Technology 2026-01001	Environmental Protection Agency	Final rule	Jan 20
Determination of Attainment by the Attainment Date; 1997 Ozone Standards; California; Coachella Valley 2026-00782	Environmental Protection Agency	Proposed rule	Jan 15
Utah; Northern Wasatch Front; 2015 8-Hour Ozone Nonattainment Area Boundary Expansion and Applicability of Certain Clean Air Act Requirements 2026-00007	Environmental Protection Agency	Final rule	Jan 6
Air Plan Revision; California; Placer County Air Pollution Control District; New Source Review 2026-00006	Environmental Protection Agency	Final rule	Jan 6
Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District 2026-00005	Environmental Protection Agency	Final rule	Jan 6
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements; Withdrawal of Direct Final Rule 2026-00004	Environmental Protection Agency	Final rule	Jan 6
Air Plan Approval; Michigan and Minnesota; Revision to Taconite Federal Implementation Plan 2025-24207	Environmental Protection Agency	Final rule	Jan 2
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma 2025-24149	Environmental Protection Agency	Final rule	Jan 2
New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana 2025-23284	Environmental Protection Agency	Final rule	Dec 18, 2025
Air Plan Approval; Michigan; Moderate Attainment Plan Elements for the Allegan County, Berrien County, and Muskegon County Areas for the 2015 Ozone Standard 2025-22607	Environmental Protection Agency	Proposed rule	Dec 11, 2025
Air Plan Disapproval; Ohio; E-Check Attestation Provisions 2025-22594	Environmental Protection Agency	Proposed rule	Dec 11, 2025
Air Plan Approval; California; South Coast Air Quality Management District 2025-22584	Environmental Protection Agency	Final rule	Dec 11, 2025
Air Plan Approval; California; San Joaquin Valley Air Pollution Control District 2025-22530	Environmental Protection Agency	Proposed rule	Dec 11, 2025
Air Plan Approval; Ohio; Emergency Episodes and Ambient Air Quality Standards 2025-21322	Environmental Protection Agency	Final rule	Nov 26, 2025
Air Plan Approval; Indiana; Second Maintenance Plan for 2008 Ozone NAAQS 2025-20672	Environmental Protection Agency	Proposed rule	Nov 21, 2025
Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements 2025-20495	Environmental Protection Agency	Final rule	Nov 20, 2025
Air Plan Approval; Minnesota; Exempt Source SIP Revision 2025-20492	Environmental Protection Agency	Final rule	Nov 20, 2025
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Stationary Combustion Turbines 2025-20407	Environmental Protection Agency	Final rule	Nov 20, 2025
Determination of Attainment by the Attainment Date but for International Emissions for the 2015 Ozone National Ambient Air Quality Standards; Phoenix-Mesa Nonattainment Area, Arizona 2025-20357	Environmental Protection Agency	Proposed rule	Nov 19, 2025
Air Plan Approval; Colorado; Inspection and Maintenance Program Revision 2025-20205	Environmental Protection Agency	Final rule	Nov 18, 2025
Air Plan Approval; Michigan; Revisions to Part 1 and 2 Rules 2025-20150	Environmental Protection Agency	Final rule	Nov 18, 2025
Approval of Clean Air Plans; San Joaquin Valley, California; Contingency Measures for 1997 Ozone Standards 2025-19884	Environmental Protection Agency	Proposed rule	Nov 14, 2025
Determination of Attainment by the Attainment Date; California; Mariposa County; 2015 8-Hour Ozone National Ambient Air Quality Standards 2025-19714	Environmental Protection Agency	Final rule	Oct 30, 2025
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; San Joaquin Valley 2025-18636	Environmental Protection Agency	Final rule	Sep 25, 2025
Utah; Northern Wasatch Front; 2015 8-Hour Ozone Nonattainment Area Boundary Expansion and Applicability of Certain Clean Air Act Requirements 2025-18569	Environmental Protection Agency	Proposed rule	Sep 25, 2025
Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District 2025-17638	Environmental Protection Agency	Proposed rule	Sep 12, 2025
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds; Architectural Coatings 2025-17500	Environmental Protection Agency	Proposed rule	Sep 11, 2025
Air Plan Revisions; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds; Solvent Cleaning 2025-17498	Environmental Protection Agency	Proposed rule	Sep 11, 2025
Air Plan Approval; Michigan; Second Period Regional Haze Plan 2025-17096	Environmental Protection Agency	Final rule	Sep 5, 2025
Extension of the Attainment Date of the Coachella Valley Extreme Nonattainment Area Under the 1997 Ozone National Ambient Air Quality Standards 2025-17060	Environmental Protection Agency	Final rule	Sep 5, 2025
Air Plan Approval; OR; Lane County Permitting Rule Revisions 2025-17055	Environmental Protection Agency	Proposed rule	Sep 5, 2025
Air Plan Approval; California; Mojave Desert Air Quality Management District; Internal Combustion Engines 2025-16466	Environmental Protection Agency	Final rule	Aug 28, 2025
Air Plan Revisions; California; Heavy-Duty Vehicle Inspection and Maintenance Program 2025-16325	Environmental Protection Agency	Proposed rule	Aug 26, 2025
Determination of Attainment by the Attainment Date; 2008 8-Hour Ozone Standards; California; Sacramento Metro Area 2025-15990	Environmental Protection Agency	Final rule	Aug 21, 2025
Air Plan Approval; California; Revised Format for Materials Incorporated by Reference 2025-15989	Environmental Protection Agency	Final rule	Aug 21, 2025
Approval and Promulgation of State Implementation Plans; New York; Emission Statement Certification of the 2008 and 2015 Ozone National Ambient Air Quality Standards 2025-15443	Environmental Protection Agency	Final rule	Aug 14, 2025
Air Plan Approval; Colorado; Inspection and Maintenance Program Revision 2025-14982	Environmental Protection Agency	Proposed rule	Aug 7, 2025
Air Plan Approval; California; South Coast Air Quality Management District 2025-14528	Environmental Protection Agency	Proposed rule	Jul 31, 2025
Interim Final Determination To Stay or Defer Sanctions; California; Mojave Desert Air Quality Management District 2025-13905	Environmental Protection Agency	Final rule	Jul 24, 2025
Determination of Attainment by the Attainment Date and Clean Data Determination; California, San Joaquin Valley 1997 Annual PM2.5 Fine Particulate Matter Nonattainment Area 2025-13339	Environmental Protection Agency	Proposed rule	Jul 16, 2025
Air Plan Approval; Minnesota; Exempt Source SIP Revision 2025-13327	Environmental Protection Agency	Proposed rule	Jul 16, 2025
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; San Joaquin Valley 2025-12856	Environmental Protection Agency	Proposed rule	Jul 10, 2025
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma 2025-12800	Environmental Protection Agency	Proposed rule	Jul 10, 2025
Air Plan Approval; California; Revised Format for Nonregulatory Provisions 2025-12586	Environmental Protection Agency	Final rule	Jul 7, 2025
Air Plan Approval; Ohio; Moderate Attainment Plan Elements for the Cleveland Area for the 2015 Ozone Standard 2025-12512	Environmental Protection Agency	Final rule	Jul 7, 2025
New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana 2025-11341	Environmental Protection Agency	Proposed rule	Jun 23, 2025
Determination To Defer Sanctions; California; Eastern Kern Air Pollution Control District; Stationary Combustion Turbines 2025-11283	Environmental Protection Agency	Final rule	Jun 20, 2025
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Stationary Combustion Turbines 2025-11281	Environmental Protection Agency	Proposed rule	Jun 20, 2025
National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma 2025-11265	Environmental Protection Agency	Final rule	Jun 20, 2025
Air Plan Approval; Indiana; Regional Haze Plan for the Second Implementation Period 2025-11259	Environmental Protection Agency	Proposed rule	Jun 18, 2025
Air Plan Approval; Arizona; Maricopa County Air Quality Department; Correction 2025-10541	Environmental Protection Agency	Final rule	Jun 11, 2025
Determination To Defer Sanctions; California; Eastern Kern Air Pollution Control District; Portland Cement Kilns 2025-10037	Environmental Protection Agency	Final rule	Jun 4, 2025
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Portland Cement Kilns 2025-10036	Environmental Protection Agency	Proposed rule	Jun 4, 2025
Air Plan Approval; California; Revised Format for Materials Incorporated by Reference 2025-10000	Environmental Protection Agency	Final rule	Jun 4, 2025
Determination of Attainment by the Attainment Date; California; Mariposa County; 2015 8-Hour Ozone National Ambient Air Quality Standards 2025-09999	Environmental Protection Agency	Proposed rule	Jun 3, 2025
Clean Data Determination and Approval of Base Year Emissions Inventory; California; Los Angeles-South Coast Air Basin; 189(d) Plan for the 2006 24-Hour PM2.5 NAAQS 2025-09997	Environmental Protection Agency	Final rule	Jun 3, 2025
Emissions Budget and Allowance Allocations for Indiana Under the Revised Cross-State Air Pollution Rule Update 2025-08964	Environmental Protection Agency	Final rule	May 20, 2025
Air Plan Approval; California; Mojave Desert Air Quality Management District; Oxides of Nitrogen 2025-08875	Environmental Protection Agency	Final rule	May 19, 2025
Air Plan Approval; Ohio; Second Maintenance Plan for 2008 Ozone NAAQS 2025-08728	Environmental Protection Agency	Proposed rule	May 19, 2025
Air Quality Plans; California; Tehama County Air Pollution Control District; New Source Review 2025-08087	Environmental Protection Agency	Final rule	May 8, 2025
Approval and Promulgation of State Implementation Plans; New York; Emission Statement Certification of the 2008 and 2015 Ozone National Ambient Air Quality Standards 2025-08077	Environmental Protection Agency	Proposed rule	May 8, 2025
Air Plan Approval; Ohio; Nitrogen Oxide Budget Program 2025-07861	Environmental Protection Agency	Final rule	May 8, 2025
Air Plan Approval; Minnesota; Revision to Taconite Federal Implementation Plan 2025-07055	Environmental Protection Agency	Proposed rule	Apr 24, 2025
Air Plan Approval; Wisconsin; Revised Format for Materials Incorporated by Reference 2025-06618	Environmental Protection Agency	Final rule	Apr 22, 2025
Interim Final Determination To Defer Sanctions, Placer County Air Pollution Control District 2025-05376	Environmental Protection Agency	Final rule	Apr 2, 2025
Air Plan Revision; California; Placer County Air Pollution Control District; New Source Review 2025-05375	Environmental Protection Agency	Proposed rule	Apr 2, 2025
Interim Final Determination To Stay or Defer Sanctions; California; Antelope Valley Air Quality Management District 2025-05157	Environmental Protection Agency	Final rule	Mar 26, 2025
Determination of Attainment by the Attainment Date; 2008 8-Hour Ozone Standards; California; Sacramento Metro Area 2025-04791	Environmental Protection Agency	Proposed rule	Mar 21, 2025
Interim Final Determination To Stay and Defer Sanctions; California; Sacramento Metro Area 2025-04790	Environmental Protection Agency	Final rule	Mar 21, 2025
Air Plan Revisions; California; Feather River Air Quality Management District 2025-04041	Environmental Protection Agency	Final rule	Mar 19, 2025
Air Plan Approval; California; Eastern Kern Air Pollution Control District; Tehama County Air Pollution Control District; San Diego County Air Pollution Control District; Emissions Statement Requirements 2025-04036	Environmental Protection Agency	Final rule	Mar 18, 2025
Extension of the Attainment Date of the Coachella Valley Extreme Nonattainment Area Under the 1997 Ozone National Ambient Air Quality Standards 2025-04035	Environmental Protection Agency	Proposed rule	Mar 17, 2025
Interim Final Determination To Defer Sanctions, San Joaquin Valley Unified Air Pollution Control District 2025-01215	Environmental Protection Agency	Final rule	Jan 21, 2025
Approval and Promulgation of Implementation Plans; State of California; Coachella Valley; Extreme Attainment Plan for 1997 8-Hour Ozone Standards 2025-01110	Environmental Protection Agency	Final rule	Jan 21, 2025
State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards 2025-00336	Environmental Protection Agency	Final rule	Jan 17, 2025
Air Plan Revisions; California; Feather River Air Quality Management District 2024-31396	Environmental Protection Agency	Final rule	Dec 31, 2024
Federal Implementation Plan for Nonattainment New Source Review Program; Mojave Desert Air Quality Management District, California 2024-30513	Environmental Protection Agency	Final rule	Dec 30, 2024
Air Plan Approval; California; Mojave Desert Air Quality Management District; Oxides of Nitrogen 2024-30413	Environmental Protection Agency	Proposed rule	Dec 26, 2024
Determination To Defer Sanctions; California; Mojave Desert Air Quality Management District 2024-30409	Environmental Protection Agency	Final rule	Dec 26, 2024
Air Plan Revisions; California; California Mobile Source Regulations 2024-30246	Environmental Protection Agency	Proposed rule	Dec 19, 2024
Partial Approval and Disapproval of Air Quality Implementation Plans; Arizona; Regional Haze State Implementation Plan for the Second Implementation Period and Prong 4 (Visibility) for the 2015 Ozone and 2012 Particulate Matter Standards 2024-29508	Environmental Protection Agency	Final rule	Dec 18, 2024
Approval of Air Quality Implementation Plans; New Jersey; Permits and Certificates for Minor Facilities (and Major Facilities Without an Operating Permit), and Air Emission Control and Permitting Exemptions 2024-29525	Environmental Protection Agency	Proposed rule	Dec 17, 2024
Air Quality Plans; Arizona; Maricopa County Air Quality Department; Source-Specific SIP Revision 2024-28910	Environmental Protection Agency	Final rule	Dec 16, 2024
Guideline on Air Quality Models; Enhancements to the AERMOD Dispersion Modeling System 2024-27636	Environmental Protection Agency	Final rule	Nov 29, 2024
Air Plan Conditional Approval; California; Bay Area Air Quality Management District 2024-27518	Environmental Protection Agency	Proposed rule	Nov 29, 2024
Clean Data Determination and Proposed Approval of Base Year Emissions Inventory; California; Los Angeles-South Coast Air Basin; 189(d) Plan for the 2006 24-Hour PM2.5 NAAQS 2024-27517	Environmental Protection Agency	Proposed rule	Nov 25, 2024
Air Plan Approval and Attainment Date Extension; 1997 Annual Fine Particulate Matter Nonattainment Area; San Joaquin Valley, California 2024-25946	Environmental Protection Agency	Final rule	Nov 19, 2024
Inflation Adjustment References for Civil Monetary Penalty Amounts in Title 40 of the Code of Federal Regulations 2024-25669	Environmental Protection Agency	Final rule	Nov 8, 2024
Federal “Good Neighbor Plan” for the 2015 Ozone National Ambient Air Quality Standards; Response to Judicial Stay 2024-25501	Environmental Protection Agency	Final rule	Nov 6, 2024
Outer Continental Shelf Air Regulations Update To Include New Jersey State Requirements 2024-25141	Environmental Protection Agency	Final rule	Oct 30, 2024
Interim Final Determination To Stay or Defer Sanctions; California; San Joaquin Valley Unified Air Pollution Control District 2024-24707	Environmental Protection Agency	Final rule	Oct 25, 2024
Conditional Approval; Contingency Measure State Implementation Plan for the 2008 Ozone Standard; San Joaquin Valley, California 2024-24706	Environmental Protection Agency	Proposed rule	Oct 25, 2024
Air Plan Approval; California; South Coast Air Quality Management District 2024-24219	Environmental Protection Agency	Final rule	Oct 21, 2024
Air Plan Approvals; Arizona; California; Correcting Amendments 2024-23423	Environmental Protection Agency	Final rule	Oct 11, 2024
Clean Air Plans; Contingency Measures for the Fine Particulate Matter Standards; San Joaquin Valley, California 2024-22681	Environmental Protection Agency	Final rule	Oct 4, 2024
State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards 2024-22008	Environmental Protection Agency	Proposed rule	Oct 4, 2024
Air Plan Revisions; California; Sacramento Metropolitan Air Quality Management District 2024-21729	Environmental Protection Agency	Final rule	Sep 25, 2024
Air Plan Revisions; California; San Diego County Air Pollution Control District 2024-21494	Environmental Protection Agency	Final rule	Sep 20, 2024
Air Plan Approval; California; Feather River Air Quality Management District 2024-19848	Environmental Protection Agency	Proposed rule	Sep 5, 2024
Air Plan Revisions; California; Motor Vehicle Inspection and Maintenance Program 2024-19374	Environmental Protection Agency	Final rule	Aug 30, 2024
Air Plan Revisions; Arizona; Maricopa County Air Quality Department 2024-17500	Environmental Protection Agency	Final rule	Aug 20, 2024
Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; Los Angeles-South Coast Air Basin 2024-17573	Environmental Protection Agency	Proposed rule	Aug 15, 2024
Outer Continental Shelf Air Regulations Update To Include New Jersey State Requirements 2024-15327	Environmental Protection Agency	Proposed rule	Jul 16, 2024
Air Plan Revisions; California; Eastern Kern Air Pollution Control District; Tehama County Air Pollution Control District; San Diego County Air Pollution Control District Emissions Statement Requirements 2024-15045	Environmental Protection Agency	Proposed rule	Jul 12, 2024
Federal Implementation Plan for Nonattainment New Source Review Program; Mojave Desert Air Quality Management District, California 2024-14695	Environmental Protection Agency	Proposed rule	Jul 9, 2024
Air Plan Revisions; California; Vehicle Inspection and Maintenance Contingency Measure 2024-14355	Environmental Protection Agency	Final rule	Jul 9, 2024
Clean Air Plans; 1997 Fine Particulate Matter Nonattainment Area Requirements; San Joaquin Valley, California 2024-14677	Environmental Protection Agency	Proposed rule	Jul 8, 2024
Air Plan Revisions; California; Sacramento Metropolitan Air Quality Management District; Reasonably Available Control Technology District 2024-14336	Environmental Protection Agency	Proposed rule	Jul 2, 2024
Air Plan Approval; ID; Revisions to Air Quality Regulations 2024-13587	Environmental Protection Agency	Proposed rule	Jun 24, 2024
Clean Air Act Reclassification of the San Antonio, Dallas-Fort Worth, and Houston-Galveston-Brazoria Ozone Nonattainment Areas; TX 2024-13193	Environmental Protection Agency	Final rule	Jun 20, 2024
Air Plan Approval; North Carolina; Revision to Approved Motor Vehicle Emissions Budgets 2024-12805	Environmental Protection Agency	Final rule	Jun 13, 2024
Approval and Promulgation of Implementation Plans; State of California; Coachella Valley; Extreme Attainment Plan for 1997 8-Hour Ozone Standards 2024-12786	Environmental Protection Agency	Final rule	Jun 12, 2024
Approval of Source-Specific Air Quality Implementation Plan; New York; Finch Paper LLC 2024-09890	Environmental Protection Agency	Final rule	May 16, 2024
Air Plan Approval; Nevada; Clark County Department of Environment and Sustainability; Nonattainment New Source Review; 2015 Ozone Standard 2024-09308	Environmental Protection Agency	Final rule	May 6, 2024
Air Quality Plans; California; San Diego County Air Pollution Control District; Permit Program 2024-09248	Environmental Protection Agency	Proposed rule	Apr 30, 2024
Air Plan Approval; California; Antelope Valley Air Quality Management District and Mojave Desert Air Quality Management District 2024-08442	Environmental Protection Agency	Proposed rule	Apr 22, 2024
Air Plan Revisions; Arizona; Maricopa County Air Quality Department 2024-07954	Environmental Protection Agency	Proposed rule	Apr 16, 2024
Extension of the Attainment Date and Determination of Attainment by the Attainment Date of the Uinta Basin Marginal Nonattainment Area Under the 2015 Ozone National Ambient Air Quality Standards 2024-07501	Environmental Protection Agency	Proposed rule	Apr 10, 2024
Air Plan Approval; Arizona; Maricopa County Air Quality Department 2024-06879	Environmental Protection Agency	Final rule	Apr 4, 2024
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Stationary Source Permits 2024-06878	Environmental Protection Agency	Final rule	Apr 3, 2024
Air Plan Revisions; California; San Diego County Air Pollution Control District 2024-06880	Environmental Protection Agency	Proposed rule	Apr 2, 2024
Air Plan Approval; OR; Permitting Rule Revisions 2024-06807	Environmental Protection Agency	Proposed rule	Apr 1, 2024
Air Quality Plans; California; Tehama County Air Pollution Control District; New Source Review 2024-06264	Environmental Protection Agency	Proposed rule	Mar 26, 2024
Air Plan Revisions; California; Yolo-Solano Air Quality Management District 2024-05259	Environmental Protection Agency	Final rule	Mar 14, 2024
Air Plan Revisions; California; Sacramento Air Quality Management District 2024-04708	Environmental Protection Agency	Final rule	Mar 6, 2024
Air Quality Implementation Plans; California; San Diego County; 2008 and 2015 8-Hour Ozone Nonattainment Area Requirements 2024-04106	Environmental Protection Agency	Final rule	Mar 1, 2024
Air Plan Approval; CA; San Joaquin Valley Air Pollution Control District 2024-03894	Environmental Protection Agency	Final rule	Feb 27, 2024
Supplemental Air Plan Actions: Interstate Transport of Air Pollution for the 2015 8-Hour Ozone National Ambient Air Quality Standards and Supplemental Federal “Good Neighbor Plan” Requirements for the 2015 8-Hour Ozone National Ambient Air Quality Standards 2024-01064	Environmental Protection Agency	Proposed rule	Feb 16, 2024
Air Plan Revisions; California; Feather River Air Quality Management District 2024-02770	Environmental Protection Agency	Proposed rule	Feb 12, 2024
Air Quality Plans; Approvals and Promulgations: California; Amador Air District; New Source Review 2024-02164	Environmental Protection Agency	Final rule	Feb 6, 2024
Air Plan Revisions; California; Butte County Air Quality Management District; Nonattainment New Source Review Requirements for the 2015 8-Hour Ozone Standard 2024-02085	Environmental Protection Agency	Final rule	Feb 5, 2024
Air Plan Approval; Alabama; Birmingham Limited Maintenance Plan for the 2006 24-Hour PM2.5 NAAQS 2024-02078	Environmental Protection Agency	Final rule	Feb 2, 2024
Clean Air Act Reclassification of the San Antonio, Dallas-Fort Worth, and Houston-Galveston Brazoria Ozone Nonattainment Areas; TX 2024-01525	Environmental Protection Agency	Proposed rule	Jan 26, 2024
Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Stationary Source Permits 2023-28528	Environmental Protection Agency	Proposed rule	Jan 2, 2024

Federal rules on nitrogen oxides: 195 since January 2024

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