🌬️EPA Approves Washington State SIP Revisions for Clean Air Compliance
The Environmental Protection Agency (EPA) is approving Washington State Implementation Plan (SIP) revisions to the Southwest Clean Air Agency (SWCAA) air quality regulations submitted by the State of Washington, through the Department of Ecology (Ecology) on June 22, 2023. The revisions were submitted in part to respond to the EPA's June 12, 2015 "SIP call" in which the EPA found a provision in the Washington SIP applicable in the area regulated by SWCAA to be substantially inadequate, providing affirmative defenses that operate to limit the jurisdiction of the Federal court in an enforcement action related to excess emissions during startup, shutdown, and malfunction (SSM) events. The EPA's approval of the SIP revisions to the substantially inadequate provision corrects the SWCAA deficiency identified in the 2015 SSM SIP call and the EPA's January 2022 finding of failure to submit. Washington withdrew some portions of the revisions submitted that were not identified in the 2015 SSM SIP call and therefore the EPA is not approving those withdrawn portions. The EPA proposed to approve this action on December 10, 2024, and received no comments.
Learn More🌫️EPA Defers Sanctions in Colorado Air Quality Plan
In the Proposed Rules section of this Federal Register, EPA is proposing approval of portions of State Implementation Plan (SIP) submissions from the State of Colorado dated June 26, 2023, May 23, 2024, and April 2, 2025. The submissions relate to Colorado Air Quality Control Commission Regulation Number 7 (Reg. 7) and Regulation Number 25 (Reg. 25) and address Colorado's SIP obligations for the contingency measures Serious ozone nonattainment area requirement for the 2008 ozone National Ambient Air Quality Standard (NAAQS). In this action, the EPA is making an interim final determination based on that proposed approval. The effect of this interim final determination is that the imposition of sanctions that were triggered by the EPA's November 7, 2023 disapproval are now deferred. Although this action is effective upon publication, the EPA will take comment on this interim final determination.
Learn More🌬️New York EPA Emission Statement Certification and Compliance
The Environmental Protection Agency (EPA) is proposing to approve portions of the comprehensive State Implementation Plan (SIP) revisions submitted by New York that certify that the State has satisfied the requirements for an emission statement program for both the Serious and Moderate classifications of the 2008 and 2015 ozone National Ambient Air Quality Standards (NAAQS), respectively. These actions are being taken in accordance with the requirements of the Clean Air Act (CAA or Act).
Learn More🚗EPA Finds Emissions Budgets Adequate for Fairbanks Transportation
The Environmental Protection Agency (EPA) is notifying the public that we have found the motor vehicle emissions budgets adequate for transportation conformity purposes for the Fairbanks North Star Borough's 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) nonattainment area. The budgets were submitted on December 4, 2024, as part of Alaska's state implementation plan revisions (Fairbanks Revised 189(d) Plan). As a result of our finding, these budgets must be used when determining conformity of the Fairbanks transportation plan and transportation improvement program.
Learn More🌬️Colorado Air Quality Plan Approval for Ozone Standards
The Environmental Protection Agency (EPA) is proposing to approve state implementation plan (SIP) submittals under the Clean Air Act (CAA) that address contingency measures requirements for the 2008 ozone National Ambient Air Quality Standards (NAAQS) for the Denver Metro/North Front Range (DMNFR) ozone nonattainment area. The requirements at issue relate to the area's previous Serious nonattainment classification. The EPA is proposing to find that the State has met the applicable CAA requirements for Serious area contingency measures and is proposing approval of the contingency measures SIP submittals, except that we are not taking action on one of the two identified contingency measures included in the submittals. In addition, the EPA is proposing to approve regulatory revisions that Colorado adopted to implement the submitted motor vehicle coating contingency measure. The EPA is taking this action pursuant to the CAA.
Learn More🌫️Tehama County Air Quality Permit Regulations Impact on Businesses
The Environmental Protection Agency (EPA) is taking final action to approve a revision to the Tehama County Air Pollution Control District's (TCAPCD or "District") portion of the California State Implementation Plan (SIP). This revision governs the District's issuance of permits for stationary sources and focuses on the preconstruction review and permitting of major sources and major modifications under part D of title I of the Clean Air Act (CAA or "the Act").
Learn More🌫️EPA Proposes Revisions to Ohio's Nitrogen Oxide Budget Program
The Environmental Protection Agency (EPA) is proposing to approve revisions to the Ohio State Implementation Plan (SIP) submitted by the Ohio Environmental Protection Agency (Ohio EPA) on November 4, 2024. The SIP revisions consist of revised Ohio Administrative Code (OAC) rules implementing the Nitrogen Oxide (NO<INF>X</INF>) Budget Program. The revised rules include non- substantive updates to rule language and updates to referenced material.
Learn More🌍Ohio EPA Nitrogen Oxide Budget Program Regulation Approved
The Environmental Protection Agency (EPA) is approving revisions to the Ohio State Implementation Plan (SIP) submitted by the Ohio Environmental Protection Agency (Ohio EPA) on November 4, 2024. The SIP revisions consist of revised Ohio Administrative Code (OAC) rules implementing the Nitrogen Oxide (NO<INF>X</INF>) Budget Program. The revised rules include non-substantive updates to rule language and updates to referenced material.
Learn More🌫️Proposed Sulfur Dioxide Regulations for Cabot Corporation in Louisiana
The Environmental Protection Agency (EPA) is proposing to approve Louisiana's State Implementation Plan (SIP) revision submitted to EPA on April 2, 2025, for the Evangeline Parish 2010 1-hour sulfur dioxide (SO<INF>2</INF>) primary national ambient air quality standard (NAAQS) nonattainment area. EPA is proposing approval of the following Clean Air Act (CAA) SIP elements: The attainment demonstration for the SO<INF>2</INF> NAAQS, which includes an Agreed Order on Consent (AOC) for the Cabot Corporation's Ville Platte Plant (Cabot) facility; the reasonable further progress (RFP) plan; the reasonably available control measures (RACM) and reasonably available control technology (RACT) demonstration; the emission inventories; and the contingency measures. The State has demonstrated that its current Nonattainment New Source Review (NNSR) program covers this NAAQS; therefore, no revision to the SIP is required for the NNSR element.
Learn More🌍EPA Seeks Nominations for Clean Air Advisory Committee Members
The U.S. Environmental Protection Agency (EPA) invites nominations of scientific experts to be considered for appointment to the Clean Air Scientific Advisory Committee (CASAC). Appointments will be made by the Administrator.
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