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Update 

The U.S. Environmental Protection Agency (EPA) has announced a further extension of the reporting deadline for unpublished health and safety data on 16 chemicals under TSCA Section 8(d). The new deadline for all substances is now May 22, 2026. 

This extension gives EPA additional time to finalize guidance and address industry concerns, particularly around submissions involving confidential business information. The chemicals affected include benzene, bisphenol A, styrene, vinyl chloride, among others under consideration for TSCA risk evaluation. 

These reports will support EPA’s ongoing chemical prioritization and risk management efforts. 

Original text 

In response to stakeholder requests, the U.S. Environmental Protection Agency (EPA) has announced an extension of the reporting deadlines under the Toxic Substances Control Act (TSCA) Health and Safety Data Reporting Rule. The rule mandates manufacturers and importers of 16 specified chemical substances to submit lists and copies of unpublished health and safety studies to EPA.   

Extended Reporting Deadline  

The original reporting deadline for all 16 chemical substances was March 13, 2025. However, EPA has now extended the deadlines as follows:  

• Vinyl chloride – New deadline: June 11, 2025  

• Remaining 15 chemical substances – New deadline: September 9, 2025 

The Environmental Protection Agency (EPA) has proposed extending the compliance deadlines under the Toxic Substances Control Act (TSCA) for certain entities regulated for their use of methylene chloride. The 18-month extension specifically applies to non-federal laboratories that are not owned or operated by federal agencies or contractors working on behalf of the federal government, under the Workplace Chemical Protection Program (WCPP) and related record keeping requirements. 

Harmonizing Compliance Deadlines 

EPA has proposed this extension to standardize the compliance deadlines for all laboratories, —both federal and non-federal, so that they follow the timeline currently applied to federal agencies and their contractors. The change is intended to prevent interruptions to essential work performed by laboratories, such as monitoring environmental conditions at cleanup sites, supporting wastewater treatment processes, and conducting academic research. These activities, especially those handled by non-federal labs, play a crucial role in helping EPA fulfill its goal of safeguarding air and water quality and ensuring responsible waste management.  

Public Consultation and Further Information 

For more information, see the FEDERAL REGISTER notice announcing the proposed rule here.  

Earlier actions associated with reference G/TBT/N/USA/1988 are filed under Docket Number EPA-HQ-OPPT-2020-0465. This docket can be accessed on Regulations.gov at https://www.regulations.gov/docket/EPA-HQ-OPPT-2020-0465/document, where all key documents, supporting materials, and public comments are available. WTO Members and their stakeholders are encouraged to submit comments to the U.S. TBT Enquiry Point. Any comments received by 4:00 p.m. Eastern Time on 26 June 2025 will be forwarded to the EPA and included in the public docket, provided they fall within the official comment period.