🌬️Proposed Updates to West Virginia's Air Quality Standards by EPA
The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the State of West Virginia. This revision updates West Virginia's incorporation by reference (IBR) of EPA's national ambient air quality standards (NAAQS) and the associated monitoring reference and equivalent methods. This action is being taken under the Clean Air Act (CAA).
Learn More🌬️Approval of Air Quality Implementation Plans in West Virginia
The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the State of West Virginia. The revision pertains to West Virginia 45 Code of State Rules (CSR) 40 (WV rule) that establishes the nitrogen oxides (NO<INF>X</INF>) ozone season limitations and requirements for non- electrical generating unit (EGU) large industrial boilers and combustion turbines that have a maximum design heat input of greater than 250 million British thermal units per hour (MMBtu/hr), as well as affected stationary internal combustion engines and cement manufacturing kilns. This action is being taken under the Clean Air Act (CAA).
Learn More🌬️Corrections to Arizona Air Quality Implementation Plan by EPA
On January 16, 2025, the Environmental Protection Agency (EPA) published a final rule in the Federal Register approving revisions to the Maricopa County Air Quality Department (MCAQD or "County") portion of the Arizona State Implementation Plan (SIP). In that rulemaking, the EPA inadvertently published numbering errors in the regulatory text codifying the approval in the Code of Federal Regulations (CFR). This document corrects the errors in the final rule's regulatory text.
Learn More🌫️Florida Haze Plan Approval & Business Compliance Implications
The Environmental Protection Agency (EPA) is approving a regional haze State Implementation Plan (SIP) revision submitted by the Florida Department of Environmental Protection (FDEP) on October 8, 2021, and supplemented on June 14, 2024, and October 28, 2024, as satisfying applicable requirements under the Clean Air Act ("CAA" or "Act") and EPA's Regional Haze Rule (RHR) for the program's second planning period. Florida's SIP submissions were submitted to address the requirement that states must periodically revise their long-term strategies for making reasonable progress toward the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility, including regional haze, in mandatory Class I Federal areas (hereinafter referred to as "Class I areas"). These SIP submissions also address other applicable requirements for the second planning period of the regional haze program. EPA is taking this action pursuant to sections 110 and 169A of the Act.
Learn More🏭Proposed Regulation on Portland Cement Kiln Emissions in California
The Environmental Protection Agency (EPA) is proposing to approve a revision to the Eastern Kern Air Pollution Control District (EKAPCD or "District") portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NO<INF>X</INF>) from Portland cement kilns. We are proposing to approve a local rule to regulate these emission sources under the Clean Air Act (CAA or "Act"). We are taking comments on this proposal and plan to follow with a final action.
Learn More🚧California's Cement Kiln Sanction Relief by EPA Announcement
The Environmental Protection Agency (EPA) is making an interim final determination that the California Air Resources Board (CARB) has submitted a revised rule on behalf of the Eastern Kern Air Pollution Control District (EKAPCD) that addresses deficiencies in its Clean Air Act (CAA or "Act") State Implementation Plan (SIP) concerning reasonably available control technology (RACT) ozone nonattainment requirements for controlling emissions of oxides of nitrogen (NO<INF>X</INF>) from Portland cement kilns. This determination is based on a proposed approval of the submitted revised rule, published elsewhere in this issue of the Federal Register. The effect of this interim final determination is that the application of offset sanctions that was triggered by a previous limited disapproval by the EPA in 2023 is now stayed, and the application of highway sanctions is now deferred. If the EPA finalizes its proposed approval of EKAPCD's submittal, relief from these sanctions will become permanent.
Learn More🌫️California Air Plan Approval
The Environmental Protection Agency (EPA) is revising the format for materials submitted by the State of California that are incorporated by reference into the California State Implementation Plan (SIP). The regulations and other materials affected by this format change have all been previously submitted by the State of California and approved by the EPA. This format revision will primarily affect the "Identification of plan--in part" sections, as well as the format of the SIP materials that will be available for public inspection at the EPA Regional Office and the National Archives and Records Administration (NARA). This action, which only relates to local ordinances and certain local and regional California air district rules, is the second of a series of actions intended to change the format for the entire California SIP.
Learn More🌫️EPA Proposes Rule for Mariposa County Air Quality Standards Compliance
The Environmental Protection Agency (EPA) is proposing to determine that the Mariposa County nonattainment area in California ("Mariposa area"), classified as "Moderate" for the 2015 ozone national ambient air quality standards (NAAQS or "standard"), attained the 2015 ozone NAAQS by the August 3, 2024 attainment date. Our proposed determination of attainment is based upon the exclusion of exceedances of the 2015 ozone NAAQS that occurred on multiple days in 2021 and 2022, because the exceedances are due to exceptional events. This action, if finalized as proposed, will fulfill the EPA's statutory obligation to determine whether the Mariposa area attained the NAAQS by the August 3, 2024 attainment date.
Learn More🌫️Clean Data Determination for Los Angeles-South Coast Air Basin
The Environmental Protection Agency (EPA) is making a clean data determination (CDD) for the Los Angeles-South Coast Air Basin ("South Coast") air quality planning area in California based on our determination that the area is attaining the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS). As a result of this CDD, certain Clean Air Act (CAA) requirements that have applied to California will be suspended for so long as the area continues to meet the 2006 24-hour PM<INF>2.5</INF> NAAQS. The EPA is also approving a revision to California's state implementation plan (SIP) consisting of the 2018 base year emissions inventory for the South Coast PM<INF>2.5</INF> nonattainment area, submitted by the California Air Resources Board (CARB) on December 29, 2020.
Learn More♻️EPA Proposes Revisions to Alter Metal Recycling Permit in Iowa
The Environmental Protection Agency (EPA) is proposing approval of revisions to the Iowa State Implementation Plan (SIP) to include a permit modification for Alter Metal Recycling. The SIP revision addresses modifications to the air construction permit for Alter Metal Recycling included in the State's 2008 Lead (Pb) National Ambient Air Quality Standards (NAAQS) attainment plan for portions of Council Bluffs, Pottawattamie County, IA. These revisions do not impact the stringency of the SIP or have an adverse effect on air quality. The EPA's proposed approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).
Learn More