🌫️EPA Approves Missouri's Sulfur Dioxide Emission Control Revisions
The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Missouri State Implementation Plan (SIP) related to replacing the previous statewide sulfur dioxide (SO<INF>2</INF>) rule with the latest version of a newer SO<INF>2</INF> rule (10 CSR 10-6.261). The SIP revisions include removing outdated requirements and reinstating SO<INF>2</INF> emission limits for the Ameren-Labadie and Evergy-Hawthorn power plants. The revisions do not impact the stringency of the SIP, nor do they impact the state's ability to attain or maintain the National Ambient Air Quality Standards (NAAQS). The EPA is also approving Missouri's negative declaration of sources subject to sulfuric acid production requirements. This final approval action is being done in accordance with the requirements of the Clean Air Act (CAA).
Learn More🌬️EPA's Proposed Nitrogen Oxide Regulation for Texas Businesses
The Environmental Protection Agency (EPA) is supplementing a proposed rule published on March 10, 2021, to approve revisions to the Texas State Implementation Plan (SIP) concerning Nitrogen Oxide (NO<INF>X</INF>) Reasonably Available Control Technology (RACT) requirements for the Serious Houston-Galveston-Brazoria (HGB), 2008 8- hour ozone National Ambient Air Quality Standard (NAAQS) nonattainment area. Because of comments received on the March 10, 2021, proposal, we are providing additional analysis, in this proposal, regarding RACT requirements which apply to sources of NO<INF>X</INF> in this area. Consistent with this analysis, EPA is proposing to determine that Texas' rules meet NO<INF>X</INF> RACT requirements for the 2008 standard under the Serious classification. The volatile organic compounds (VOC) portion of the RACT analysis in the Serious area Attainment Demonstration submittal is addressed in a separate action. The EPA is providing an opportunity for public comment on this supplemental proposal. Comments received on the March 10, 2021, proposal and this supplemental proposal will be addressed in a final rule.
Learn More🌫️EPA Approves California's Regional Haze Plan
The Environmental Protection Agency (EPA) is approving the regional haze state implementation plan (SIP) revision submitted by California on August 9, 2022 (hereinafter the "2022 California Regional Haze Plan" or "the Plan"), under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the program's second implementation period. The Plan addresses the requirement that states must periodically revise their long-term strategies for making reasonable progress towards the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility, including regional haze, in mandatory Class I Federal areas. The Plan also addresses other applicable requirements for the second implementation period of the regional haze program. The EPA is taking this action pursuant to CAA sections 110 and 169A.
Learn More🌫️EPA Proposes Approval of Arkansas Regional Haze SIP for Visibility
Pursuant to the Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Arkansas through the Division of Environmental Quality (DEQ) on August 8, 2022, and clarified by DEQ on July 29, 2025, as satisfying the requirements of the Act and the EPA's Regional Haze Rule (RHR) for visibility protection in mandatory Class I Federal areas (Class I areas) for the program's second implementation period. Arkansas' SIP submission addresses the requirement that states must revise their long-term strategies for making reasonable progress to prevent any future and remedy any existing man-made visibility impairment in the Class I areas. The EPA is taking this action pursuant to sections 110 and 169A of the CAA.
Learn More🌬️Georgia Eases Air Quality Permitting Requirements for Businesses
The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Georgia through the Georgia Environmental Protection Division (EPD) on June 27, 2024. The revision seeks to remove permitting requirements related to nonattainment, including nonattainment new source review (NNSR), from Georgia's SIP as obsolete, remove certain provisions related to the use of emission reduction credits (ERCs), and make other changes based upon the lack of any areas designated as nonattainment for the National Ambient Air Quality Standards (NAAQS) in Georgia. EPA is proposing to approve these changes pursuant to the Clean Air Act (CAA or Act).
Learn More🌍EPA Proposes Approval of Ohio's Ozone Regulation Revisions
The Environmental Protection Agency (EPA) is proposing to approve revisions to Ohio Administrative Code (OAC) Chapters 3745-21 and 3745-110 into the Ohio State Implementation Plan (SIP). The Ohio Environmental Protection Agency ("Ohio" or "Ohio EPA") submitted these revisions on March 30, 2022, and supplemented the submittal on February 1, 2023, and August 28, 2023. EPA is proposing to approve parts of OAC Chapters 3745-21 and 3745-110 as satisfying some of the Moderate Volatile Organic Compound (VOC) Reasonably Available Control Technology (RACT) and Nitrogen Oxide (NO<INF>x</INF>) RACT requirements for the Cleveland, OH nonattainment area (Cuyahoga, Geauga, Lake, Lorain, Medina, Portage, and Summit counties) under the 2015 ozone National Ambient Air Quality Standard ("NAAQS" or "standard"). Finally, EPA is proposing to approve OAC rule 3745-15-03, submitted by Ohio on February 9, 2023, and supplemented on December 1, 2023, and December 30, 2024.
Learn More🚗Proposed Rule for Pennsylvania Vehicle Emission Standards
The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania. This SIP revision addresses Clean Air Act (CAA) requirements for the enactment of a Basic vehicle emissions inspection and maintenance (I/M) program for the five counties comprising the Pennsylvania portion of the Philadelphia-Wilmington- Atlantic City, PA-NJ-MD-DE Moderate nonattainment area (Philadelphia nonattainment area) for the 2015 8-hour ozone national ambient air quality standards (NAAQS).
Learn More🌫️EPA Approves South Dakota’s Regional Haze State Implementation Plan
The Environmental Protection Agency (EPA) is approving a regional haze state implementation plan (SIP) revision submitted by the State of South Dakota on July 29, 2022 (South Dakota's 2022 SIP submission), as satisfying applicable requirements under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the program's second implementation period. The EPA is taking this action pursuant to CAA.
Learn More🌬️Proposed Revisions to Arkansas Air Quality Implementation Plan
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve revisions to the Arkansas State Implementation Plan (SIP) submitted to the EPA on February 4, 2025. The revisions address the codification of the Arkansas Pollution Control and Ecology Commission (APC & EC) Rule 19 and Regulations 9, 26, and 31 into the Code of Arkansas Rules (CAR). The revisions are non-substantive and administrative in nature, and do not add or relax any provisions in the approved SIP.
Learn More🌿EPA Updates Washington State Implementation Plan for Air Quality
The Environmental Protection Agency (EPA) is updating the materials that are incorporated by reference (IBR) into the Washington State Implementation Plan (SIP). The regulations affected by this update have been previously submitted by Washington and approved by the EPA. This update affects the materials that are available for public inspection at the National Archives and Records Administration (NARA) and the EPA Regional Office.
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