If your company manufactures or imports chemicals in the United States, the Chemical Data Reporting (CDR) rule under the Toxic Substances Control Act (TSCA) may require you to report to the US Environmental Protection Agency (EPA) every four years. This guide explains who is covered, what must be reported and how to prepare for the next cycle in 2028.
This is general information, not legal advice. Check the current rule and EPA guidance for your specific situation.
What is CDR?
CDR is EPA’s main source of exposure-related information on chemicals made in or imported into the USA. Companies report the types and volumes of chemicals they manufacture or import, and how those chemicals are processed and used. EPA uses the data to prioritise chemicals for risk evaluation and publishes much of it. In April 2026, EPA released the 2024 CDR data, covering production and import from 2020 through 2023.
Who must report?
- Manufacturers and importers of chemical substances listed on the TSCA Inventory. Under TSCA, importing counts as manufacturing.
- At a single site, generally when volumes reach 25,000 pounds or more in any year of the reporting period.
- A lower threshold of 2,500 pounds applies to chemicals that are subject to certain TSCA actions.
- Some substances and activities are exempt or partially exempt, such as certain naturally occurring substances, polymers and small businesses, subject to conditions in the rule.
What gets reported?
- Company and site information.
- Chemical identity, usually by CAS Registry Number.
- Production and import volumes for each year of the reporting period.
- For the principal reporting year, more detailed information on industrial processing and use, and on consumer and commercial uses, where known or reasonably ascertainable.
The 2028 cycle
According to EPA, the next submission period runs from 1 June to 30 September 2028. The principal reporting year is 2027, for which full manufacturing, processing and use information is due, with production volumes reported for each year from 2024 to 2027. Reports are submitted electronically through EPA’s Central Data Exchange (CDX).
How to prepare now
- Inventory your chemicals by site, with CAS numbers and annual volumes from 2024 onward.
- Check imported mixtures; you may need component information from foreign suppliers, which can take time to obtain.
- Track TSCA actions that could lower the threshold for a chemical you handle.
- Gather use information from customers where it is reasonably available.
- Assign responsibility and set up a CDX account well before the window opens.
Chemical suppliers and distributors often help customers with documentation. See our guides to choosing chemical suppliers and bulk chemical supply.
Frequently asked questions
How often is CDR reporting required?
Every four years.
Does CDR apply outside the USA?
It applies to manufacturing and importing in the USA. Foreign suppliers are affected indirectly because US importers need their information. Europe and the UK use REACH and UK REACH instead.
When is the next CDR deadline?
The 2028 submission period runs from 1 June to 30 September 2028.
