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The U.S. Environmental Protection Agency (EPA) has released new guidance materials to help companies meet updated requirements for submitting new chemical information under the Toxic Substances Control Act (TSCA). These requirements were introduced in a final rule published in December 2024. 

Interim Submission Process While CDX Updates Are Pending 

The final rule now requires companies to include more detailed information in their new chemical submissions—if that information is known or can reasonably be found by the company. 

While EPA is working to update its Central Data Exchange (CDX) system to handle the new requirements, those system changes are not yet complete. In the meantime, companies must use the current CDX system. To help with this, EPA has issued clear, temporary instructions on how to include the required information using the existing submission process. 

Future Implementation and Stakeholder Training 

Once the updated CDX system is ready, EPA will inform and train stakeholders on how to use the system. At that point, the temporary instructions will no longer apply. 

For more details, visit the final rule docket and EPA’s technical support page for PMN submissions. 

On May 12, 2025, the U.S. Environmental Protection Agency (EPA) issued an interim final rule delaying the start of the PFAS reporting period under the Toxic Substances Control Act (TSCA) Section 8(a)(7). Originally set to begin on July 11, 2025, the reporting window will now open April 13, 2026. This extension allows the Agency more time to finalize and test the data collection system. 

New Deadlines

General manufacturers and importers: October 13, 2026 

Small manufacturers (article importers only): April 13, 2027 

The submission delay takes effect immediately, but EPA will accept public comments on it for 30 days. The Agency may also revisit other parts of the PFAS reporting rule and will review all comments together. Feedback can be submitted at www.regulations.gov (Docket: EPA-HQ-OPPT-2020-0549). 

The agency may also propose changes to other parts of the rule in the near future. 
For more information about the rule, please visit US EPA finalises rule requiring reporting of PFAS data.