🌬️Kentucky SO2 Nonattainment Regulations and Business Compliance
The Environmental Protection Agency (EPA) is proposing to approve two State Implementation Plan (SIP) revisions submitted by the Commonwealth of Kentucky, through the Energy and Environment Cabinet (Cabinet), Division of Air Quality (DAQ) on January 26, 2024, and February 15, 2024, to certify two requirements under the Clean Air Act (CAA or Act). These revisions establish that the Kentucky SIP satisfies the nonattainment new source review (NNSR) and base year emissions inventory requirements for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (NAAQS) for the Henderson-Webster SO<INF>2</INF> nonattainment area (hereinafter "Henderson-Webster SO<INF>2</INF> Nonattainment Area" or "Area"). These actions are being proposed pursuant to the CAA.
Learn More🌍Business Implications of California's Carbon Monoxide SIP Revision
The Environmental Protection Agency (EPA) is taking final action to approve a revision to the California state implementation plan (SIP) that removes carbon monoxide (CO) contingency measures and monitoring requirements from the maintenance plan for three CO maintenance areas: Chico Urbanized Area, Modesto Urbanized Area, and Stockton Urbanized Area. We are approving the revision under the Clean Air Act (CAA or "Act").
Learn More🌫️EPA Approves Michigan's Regional Haze Plan - Business Implications
The Environmental Protection Agency (EPA) is approving the Regional Haze State Implementation Plan (SIP) revision submitted by the Michigan Department of Environment, Great Lakes, and Energy (EGLE) on August 23, 2021, and supplemented on July 24, 2025, as satisfying applicable requirements under the Clean Air Act (CAA) and EPA's Regional Haze Rule (RHR) for the program's second implementation period. EGLE's SIP submission 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 SIP submission also addresses other applicable requirements for the second implementation period of the regional haze program. EPA is taking this action pursuant to sections 110 and 169A of the CAA.
Learn More🌫️EPA Air Quality Regulations Changes Impacting Lane County Businesses
The Environmental Protection Agency (EPA) proposes to approve the June 26, 2024, submitted revisions to the Oregon State Implementation Plan (SIP) applicable in Lane County, Oregon. The changes update the local stationary source permitting regulations to align with existing State regulations. The revisions eliminate generic plant site emission limits in favor of source-specific and source- category specific limits, update construction notification requirements, clarify the use of modeling and monitoring for compliance assurance, and streamline the permit application process.
Learn More🌬️EPA Approves West Virginia's Title V Operating Permits Program Revision
The Environmental Protection Agency (EPA) is approving a Title V Operating Permits Program revision submitted by the West Virginia Department of Environmental Protection (WVDEP) on behalf of the State of West Virginia. The revision incorporated by reference final rules promulgated by the EPA, effective June 1, 2020, into West Virginia's Title V Operating Permits Program. The EPA is approving these revisions to the West Virginia Title V Operating Permits Program in accordance with the requirements of the Clean Air Act (CAA). The approval will serve to maintain consistency between the State and Federal counterpart regulations.
Learn More🌬️EPA Withdraws Nonattainment Designation for Texas Areas
On May 16, 2025, the United States Court of Appeals for the Fifth Circuit (the Court) granted petitions for review of the EPA's nonattainment area designation for the Rusk and Panola Counties area, Texas for the 2010 SO<INF>2</INF> National Ambient Air Quality Standard (NAAQS). Accordingly, that nonattainment designation for the area has been vacated. The vacatur of the nonattainment designation necessarily requires the withdrawal of two contingent actions since the underlying designation is no longer valid: EPA's finding of failure to submit an attainment plan (FFS) issued on August 10, 2020, and EPA's finding of failure to attain the NAAQS by the attainment date (FFA) issued on December 17, 2024. The EPA is withdrawing these two final actions in accordance with the court's decision and finds that any requirements deriving from either the FFS or the FFA are no longer applicable.
Learn More🌎Proposed Rule on VOC RACT Regulations in Texas DFW Area
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve the May 12, 2020, and May 13, 2020, revisions to the Texas State Implementation Plan (SIP) as satisfying the Serious classification Volatile Organic Compounds (VOC) Reasonably Available Control Technology (RACT) requirement for the Dallas-Fort Worth (DFW) 2008 8-hour ozone National Air Quality Ambient Air Quality Standards (NAAQS) nonattainment area. The DFW area, designated as Serious for the 2008 8-hour ozone NAAQS, consists of Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, and Wise Counties. Specifically, we are proposing to approve the revisions to 30 Texas Administrative Code (TAC) Chapter 115 to implement the major source Reasonably Available Control Technology (RACT) requirement for VOC as addressed in the VOC RACT analysis and negative declaration included with the Serious area Attainment Demonstration (AD) SIP revision. The Nitrogen Oxide (NO<INF>X</INF>) portion of the RACT analysis in the May 13, 2020, revisions will be addressed in a separate action.
Learn More🌫️Proposed Revisions to Clean Air Act Permit Program in San Diego
The Environmental Protection Agency (EPA) is proposing approval of revisions to the Clean Air Act (CAA or "Act") Operating Permit Program (title V) of the San Diego County Air Pollution Control District (SDCAPCD or "District") in California. Once approved, these revisions will update the District's public noticing requirements to conform to current federal requirements for title V programs. We are taking comments on these proposed revisions and are simultaneously publishing our final action approving these revisions in a direct final rule.
Learn More🌫️EPA Approves Idaho's Regional Haze Implementation Plan
The Environmental Protection Agency (EPA) is approving the Idaho regional haze State Implementation Plan (SIP) revision submitted on August 5, 2022, supplemented on September 27, 2024, and clarified on August 12, 2025, as satisfying applicable requirements under the Clean Air Act and the EPA's Regional Haze Rule (RHR) for the program's second implementation period. The Idaho SIP revision addressed the requirement to make reasonable progress toward the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility in certain national parks and wilderness areas.
Learn More🌬️Clean Air Act Operating Permit Program Revisions in California
With this direct final rule, the Environmental Protection Agency (EPA) is promulgating approval of revisions to the Clean Air Act Operating Permit Program (title V) of the San Diego County Air Pollution Control District (SDCAPCD or "District") in California. The EPA is taking this final action in accordance with federal regulations and the Clean Air Act (CAA or "Act").
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