The EPA is conforming EPCRA hazardous chemical inventory reporting regulations to the OSHA's Hazard Communication Standard amendments of 2012 and 2024. EPCRA and its regulations rely on the OSHA's Hazard Communication Standard for the definition of a hazardous chemical and for the categories of health and physical hazards that must be reported under the hazardous chemical inventory regulations. This action conforms the terminology used and information that must be reported on the hazardous chemical inventory forms to the Hazard Communication Standard amendments. As a result, this action improves first responder and community safety, reduces discrepancies and confusion, prevents interpretation burdens on facilities when using (Material) Safety Data Sheets to complete annual hazardous chemical inventory reports, and enhances clarity. This final rule is effective 21 August 2026. POC is Jennifer Barre, tele: (202) 564-9026 or (240) 644-4559; email: barre.jennifer@epa.gov. (Federal Register 22 June 2026 [Rule] Pages 37022-37043).