Regulations

The Northwest Clean Air Agency (NWCAA), located in Washington State, submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of newly issued or revised New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP), as provided for under previously approved delegation mechanisms. The updated regulations incorporate by reference certain NSPS and NESHAP promulgated by the Environmental Protection Agency (EPA) as they existed through October 18, 2023. The EPA is providing notice that it is proposing to update the delegation of certain NSPS and approve the delegation of certain NESHAP to NWCAA. The proposed delegation of authority under this action does not apply to sources located in Indian country.

The U.S. Environmental Protection Agency (EPA) is proposing to approve a revision to the Arizona Department of Environmental Quality (ADEQ or "State") portion of the Arizona State Implementation Plan (SIP). This revision concerns emissions of particulate matter (PM) that are 10 micrometers ([mu]m) or smaller in diameter (PM<INF>10</INF>) from agricultural crop and animal operations in the West Pinal County PM<INF>10</INF> nonattainment area. We are proposing to approve two local rules to regulate these emission sources under the Clean Air Act (CAA or "Act").

The U.S. Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the State of Arizona to meet Clean Air Act (CAA or "Act") requirements applicable to the Pinal County (Part); West Pinal PM<INF>10</INF> nonattainment area ("West Pinal County PM<INF>10</INF> Nonattainment Area"). The EPA is proposing to find that the submitted SIP revision meets all applicable "Moderate" area, "Serious" area, and CAA section 189(d) requirements for the PM<INF>10</INF> national ambient air quality standards (NAAQS). Additionally, the EPA is proposing to approve the PM<INF>10</INF> motor vehicle emissions budgets included with the SIP revision for transportation conformity purposes. The EPA is also starting the adequacy process for these budgets. Our proposed approval of the SIP revision would establish an attainment date of December 31, 2026, for the area.

The U.S. Environmental Protection Agency (EPA) is proposing to approve revisions to the Pinal County Air Quality Control District (PCAQCD or "District") portion of the Arizona State Implementation Plan (SIP). These revisions concern emissions of particulate matter (PM) that is 10 micrometers or smaller in diameter (PM<INF>10</INF>) from fugitive dust sources, including open areas/vacant lots, unpaved lots, unpaved roads, paved public roadways, and construction sites. We are proposing to approve local rules to regulate these emission sources under the Clean Air Act (CAA or "Act").

The U.S. Environmental Protection Agency (EPA) is finalizing an approval of a revision to the Arizona State Implementation Plan (SIP) submitted by the Arizona Department of Environmental Quality (ADEQ). This revision includes statutes and regulations amending the Cleaner Burning Gasoline (CBG) program, which is a control measure in the greater Phoenix metropolitan area to reduce emissions of ozone- forming pollutants, carbon monoxide (CO), and particulate matter. Additionally, this revision addresses the Winter Oxygenated Fuel program to control CO emissions in the Tucson area. Finally, this revision repeals the Arizona Gasoline Set[hyphen]aside (GSA) Program, applicable to the 1971 carbon monoxide nonattainment area covering Maricopa County and a portion of Pima County. This SIP revision is administrative in nature. This final action updates the existing SIP- approved CBG program with revisions that have been adopted and implemented by the State to clarify requirements, update references, and enhance flexibility of the program and will not impose any additional costs or regulatory burdens.

The U.S. Environmental Protection Agency (EPA) is co-proposing two approaches to revising the existing 2026 and 2027 small refinery exemption (SRE) reallocation volumes under the Renewable Fuel Standard (RFS) program in response to a higher volume of 2025 SREs than previously projected when the Agency set the renewable fuel volumes and percentage standards on April 1, 2026. One approach would reallocate the additional 2025 SRE volume equally between the 2026 and 2027 SRE reallocation volumes, while the other approach would reallocate all the additional 2025 SRE volume to the 2027 SRE reallocation volume. Additionally, given the proposed revision to the 2026 standards, this proposed action may extend the existing 2026 compliance reporting deadline of March 31, 2027.

EPA is making a correction to a final rule that appeared in the Federal Register on August 26, 2026. The final rule established significant new use rules (SNURs) under the Toxic Substances Control Act (TSCA) for chemical substances that were the subject of premanufacture notices (PMNs) and Orders issued by EPA pursuant to TSCA. Subsequent to the publication, the Agency identified an error in a chemical name.

EPA is issuing significant new use rules (SNURs) under the Toxic Substances Control Act (TSCA) for certain chemical substances that were the subject of premanufacture notices (PMNs) and are also subject to an Order issued by EPA pursuant to TSCA. The SNURs require persons to notify EPA at least 90 days before commencing the manufacture (defined by statute to include import) or processing of any of these chemical substances for an activity that is designated as a significant new use in the SNUR. The required notification initiates EPA's evaluation of the conditions of that use for that chemical substance. In addition, the manufacture or processing for the significant new use may not commence until EPA has conducted a review of the required notification; made an appropriate determination regarding that notification; and taken such actions as required by that determination.

The Environmental Protection Agency (EPA) is taking interim final action to extend the reporting deadline under the Greenhouse Gas Reporting Rule for reporting year 2025 data from October 30, 2026, to March 10, 2027. This final action only changes the reporting deadline for annual greenhouse gas reports for reporting year 2025 and makes no other changes to the rule. The EPA is requesting comments on all aspects of this interim final rule.

The Environmental Protection Agency (EPA or Agency) is proposing to extend certain compliance dates applicable to certain entities subject to the regulation of trichloroethylene (TCE) under the Toxic Substances Control Act (TSCA) until December 31, 2027, including for certain chemical processors in meeting the prohibition compliance deadline for the processing of TCE, industrial and commercial use of TCE as a processing aid, and associated wastewater disposal; and for refrigerant manufacturers in meeting the compliance deadline for phasing down TCE feedstock in the production of HFC-134a. This proposed compliance extension would allow for necessary and reasonable transition periods for regulated entities under TSCA section 6(d).

The Environmental Protection Agency (EPA) is finalizing an extension to the compliance date for Facility Response Plans (FRPs) required by the Clean Water Act (CWA) addressing potential worst-case discharges of CWA hazardous substances. These requirements apply to onshore non-transportation-related facilities that could reasonably be expected to cause substantial harm to the environment from a CWA hazardous substance worst-case discharge to navigable waters, adjoining shorelines, or the exclusive economic zone. This action is also finalizing language modifications to remove references to climate change and environmental justice in the FRP requirements to align with Executive Order 14148 of January 20, 2025. EPA is revising the compliance deadlines in light of serious concerns that facilities may be unable to comply with the relevant requirements by the existing deadline. These changes are necessary to allow the Agency to consider implementation and compliance assistance tools that regulated facilities may be able to take advantage of when complying with the new requirements, and to ensure proper planning for all communities while promoting a science-based and risk-based approach to planning. EPA also recognizes that a delay would provide time for EPA to consider whether revisions are necessary before facilities must comply.

The U.S. Environmental Protection Agency (EPA or the Agency) is approving an application from the State of Colorado that requests primary enforcement responsibility (primacy) for Class VI injection wells under Safe Drinking Water Act (SDWA) section 1422. The EPA's approval of the State's UIC program primacy application will allow the Colorado Energy and Carbon Management Commission (ECMC) to issue and enforce UIC Class VI permits for geologic carbon sequestration. The EPA will remain the permitting authority for Class VI injection wells on Indian lands within the State. With this action, the EPA also intends to codify previously approved, non-substantial changes to Colorado's UIC program for Class II injection wells.

The U.S. Environmental Protection Agency (EPA) is determining under the Clean Air Act (CAA) that the Berrien County and Muskegon County, Michigan nonattainment areas have attained the 2015 ozone National Ambient Air Quality Standards (NAAQS). This determination, informally known as a clean data determination, is based upon complete, quality assured, and certified ambient air monitoring data for the 2023-2025 design value period showing that the areas achieved attainment of the 2015 ozone NAAQS. This clean data determination also relies upon the Michigan Department of Environment, Great Lakes, and Energy's (EGLE's) exceptional events request submitted to the EPA on December 26, 2025, and which the EPA concurred on January 12, 2026. As a result of this determination, the EPA is suspending the requirements for the Berrien and Muskegon areas to submit attainment demonstrations and associated Reasonably Available Control Measures (RACM), Reasonable Further Progress (RFP) plans, contingency measures for failure to attain or make reasonable progress, and other planning State Implementation Plans (SIPs) related to attainment of the 2015 ozone NAAQS for as long as the areas continue to attain the 2015 ozone NAAQS.

The U.S. Environmental Protection Agency (EPA or Agency) is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky through the Energy and Environment Cabinet (Cabinet) on behalf of the Louisville Metro Air Pollution Control District (District) via a letter dated June 3, 2024. The SIP revision consists of a Limited Maintenance Plan (LMP) for the Kentucky portion of the bi-state Louisville, Kentucky-Indiana 1997 8-hour ozone maintenance area (the "bi-state Louisville Area"). The Kentucky portion of the bi-state Louisville Area is comprised of Bullitt, Jefferson, and Oldham Counties in Kentucky (the "Louisville Area"). The EPA is approving the Louisville Area's LMP because it provides for the maintenance of the 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS) within the bi-state Louisville Area through the end of the second 10-year portion of the maintenance period. The effect of this action is to make certain commitments related to maintenance of the 1997 8-hour ozone NAAQS in the Louisville Area federally enforceable as part of the Kentucky SIP.

Pursuant to the Federal Clean Air Act (CAA or the Act), the U.S. Environmental Protection Agency (EPA) is approving portions of the State Implementation Plan (SIP) submittal from the State of Oklahoma demonstrating that the State satisfies the interstate transport requirements of the CAA for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standard (NAAQS). This provision requires each State's implementation plan to contain adequate requirements prohibiting the interstate transport of air pollution in amounts that will contribute significantly to nonattainment, or interfere with maintenance, of a NAAQS in any other State.

This notice announces that pesticide related information submitted to EPA's Office of Pesticide Programs (OPP) pursuant to the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and the Federal Food, Drug, and Cosmetic Act (FFDCA), including information that may have been claimed as Confidential Business Information (CBI) by the submitted, will be transferred to the Eastern Research Group (ERG) in accordance with the CBI regulations. ERG have been awarded a contract to perform work for OPP, and access to this information will enable the ERG to fulfill the obligations of the contract.

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of New Jersey for purposes of certifying and meeting the requirements for Reasonably Available Control Technology (RACT) for the Serious classification of the 2008 and the Moderate classification of the 2015 8-hour ozone National Ambient Air Quality Standards (NAAQS). The EPA is also approving that the SIP revisions fulfill SIP requirements pertaining to the Ozone Transport Region (OTR) for the 2015 ozone NAAQS. These actions are being taken in accordance with the requirements of the Clean Air Act (CAA).

The U.S. Environmental Protection Agency (EPA or Agency) is approving 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 removes permitting requirements related to nonattainment, including nonattainment new source review (NNSR), from Georgia's SIP as obsolete, removes certain provisions related to the use of emission reduction credits (ERCs), and makes other changes based upon the lack of any areas designated as nonattainment for the National Ambient Air Quality Standards (NAAQS) in Georgia. The EPA is approving these changes pursuant to the Clean Air Act (CAA or Act).