May EPA Federal Registry Updates
Risk Evaluation under the Toxic Substances Control Act: 1,2-Dichloroethane
Effective date:;
Summary: A notice from the EPA for the availability of the final risk evaluation under the Toxic Substances Control Act (TSCA) for 1,2-dichloroethane. The EPA has deemed it not a risk for consumer exposure and will now initiate risk management actions to address the unreasonable risk.
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Effective date: May 13, 2026 ;
Summary: A final rule from the EPA to eliminate the need to establish a maximum permissible level for residues of xirane, 2-phenyl-, polymer with oxirane, mono(hydrogen 2-sulfobutanedioate), octyl ether, sodium salt (1:2) on food or feed commodities when used in pesticide applications. This was requested by Evonik Corporation and is regulated under the Federal Food, Drug, and Cosmetic Act (FFDCA).;
Begin Actual Construction in the New Source Review Preconstruction Permitting Program
Effective date: comments must be received on or before June 29, 2026;
Summary: A proposed rule from the EPA for revisions to the New Source Review (NSR) air permitting regulations for construction of a stationary source and construction of non-emitting components.;
Effective date: comments must be received on or before June 17, 2026;
Summary: a proposed rule from the EPA for revisions of the technology-based effluent limitations guidelines and standards (ELGs) promulgated in the 2024 “Supplemental Effluent Limitations Guidelines and Standards for the Steam Electric Power Generating Point Source Category.” This would lead to a reduction of costs by $446 to $1,090 million dollars.;
Effective date: comments must be received on or before July 6, 2026;
Summary: a proposed rule from the EPA for reconsideration of Tier 4 criteria pollutant standards for new motor vehicles within the rule “Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles.” Test protocols used to evaluate emissions performance for certification and related regulatory issues would also be altered.;
Compliance Deadline for the PFOA and PFOS Maximum Contaminant Levels; Extension
Effective date: comments must be received on or before July 20, 2026;
Summary: a notice from the EPA ;to extend the dates of compliance with the maximum contaminant levels (MCLs) for perfluoroctanoic acid (PFOA) and perfluoroctane sulfonic acid (PFOS) from April 26, 2026 to April 26, 2031.;
Effective date: comments must be received on or before July 20, 2026;
Summary: a proposed rule from the EPA to rescind regulatory determinations to regulate four per- and polyfluoroalkyl substances (PFAS) – perfluorohexane sulfonic acid (PFHxS), perfluoronanoic acid (PFNA), hexafluoropropylene oxide dimer acid and its ammonium salt (HFPO-DA, commonly known as GenX chemicals) and mixtures of these three PFAS plus perfluorobutane sulfonic acid (PFBS). This would then have the EPA and SDWA having regulations for these PFAS separately versus in tandem.;
Effective date: June 22, 2026;
Summary: a final rule from the EPA to approve revisions for the reasonably available control technology (RACT) requirements for the 2015 ozone national ambient air quality standards (NAAQS) within the Gila County portion of the Phoenix-Mesa ozone nonattainment area.;
Pesticide Tolerance; Exemptions, Petitions, Revocations, etc.: Aluminum in Pesticide Formulations
Effective date: May 22, 2026;
Summary: a final rule from the EPA to eliminate the need to establish a maximum permissible level for residues of aluminum (CAS Reg. No. 7429-90-5) when used as an inert ingredient for seed treatment only at not more than 5% of pesticide formulation. This petition was submitted by Steptoe & Johnson LLp on behalf of Sun Chemical and is regulated under the FFDCA.;
Effective date: May 22, 2026;
Summary: A final rule from the EPA to extend the reporting deadline for the Health and Safety Data Reporting Rule under the TSCA by one year to May 21, 2027.;
Effective date: July 27, 2026;
Summary: A final rule from the EPA to finalize regulations under the Technology Transitions provision of the American Innovation and Manufacturing Act of 2020. This would allow for the inventory of residential and light commercial air conditioning and heat pump equipment manufactured or imported into the United States before January 1, 2025 can continue to be installed.;
Effective date: July 10, 2026;
Summary: a proposed rule from the EPA to propose an exemption for road and intermodal container transport refrigeration units from the leak repair requirements established under the American Innovation and Manufacturing (AIM) Act. Leak repair requirements for refrigerant containing appliances with a charge size of 15 pounds or more that contain a hydrofluorocarbon (HFC) or substitutes for HFCs are being refined in the rule, “Phasedown of Hydrofluorocarbons: Management of Certain Hydrofluorocarbons and Substitutes Under the American Innovation and Manufacturing Act of 2020.”;