prodchem
Jul 30, 2026
The Chemical Data Reporting program, widely known as CDR, is one of the quieter but most consequential compliance obligations in the United States chemical trade. Every four years, manufacturers and importers must tell the Environmental Protection Agency how much of each TSCA listed chemical they produced or brought into the country. For global buyers and exporters shipping into the US market, understanding CDR is not optional. It shapes how supply chains get documented and how EPA prioritizes chemicals for risk review.
CDR operates under Section 8(a) of the Toxic Substances Control Act. It requires companies to report production volume, chemical characteristics and how a substance gets processed or used after manufacture.
The program was previously called the Inventory Update Reporting rule before it took its current name. Its purpose has stayed consistent throughout.
It gives EPA a screening level picture of chemical exposure across the country.
It supports risk evaluation work carried out by the Office of Pollution Prevention and Toxics.
It feeds into public tools that researchers, companies and other government bodies rely on for chemical data.
Reporting obligations fall on manufacturers, and this explicitly includes importers, at each site that crosses a defined production threshold. A site refers to the physical location manufacturing the chemical in the US or handling the import directly.
The standard annual threshold sits at 25,000 pounds for most listed chemicals. Substances tied to certain ongoing TSCA actions carry a lower threshold of 2,500 pounds, so buyers dealing in specialty or regulated substances should check this carefully.
Several categories of substances fall outside CDR reporting requirements:
Chemicals not listed on the TSCA Inventory in the first place.
Substances excluded from the TSCA definition, such as those manufactured solely for pesticide use or covered under food and drug law.
Chemicals produced only by an entity that qualifies as a small manufacturer under CDR rules.
Certain exempted categories including most polymers, microorganisms, naturally occurring substances and water.
Importers sit at the center of the CDR obligation just as domestic manufacturers do. If a trading partner is bringing a TSCA listed chemical into the United States above the reporting threshold, that volume needs to be captured and reported at the site level, not pooled across a parent company.
This has real consequences for how procurement and logistics teams structure their paperwork. Production volume under CDR is calculated per site, which means a company operating multiple US facilities cannot simply report a single combined number. Each importing site carries its own reporting responsibility.
Buyers sourcing internationally should keep a few practical points in mind:
Confirm early whether the chemical being traded sits on the TSCA Inventory at all.
Track annual import volumes per site rather than at the company level.
Watch for lower thresholds tied to chemicals under active TSCA review.
Build recordkeeping habits now rather than scrambling before a submission deadline.
CDR reporting has run on roughly a four year cycle since 1986. The most recent cycle closed in 2024, covering chemicals manufactured or imported between 2020 and 2023.
The next cycle is scheduled for 2028. Companies will need to determine reporting obligations based on production volumes spanning 2024 through 2027, with the actual submission window running from June 1, 2028 to September 30, 2028.
That gap between now and the submission period is exactly why preparation matters. Companies collecting accurate volume data across 2024 through 2027 will face a far smoother submission process than those trying to reconstruct four years of trade history at the last minute.
CDR is not just a paperwork exercise. EPA describes the database as its most comprehensive source of screening level, exposure related chemical information. That data directly informs how the agency prioritizes chemicals for further review and risk assessment.
Beyond EPA itself, the non-confidential portion of CDR data is publicly accessible. Researchers, companies and non-governmental organizations regularly pull from it through EPA's public data downloads and the ChemView search tool. For chemical traders, this means CDR submissions do not stay locked inside a regulatory filing cabinet. They become part of a broader public record that shapes market perception and regulatory attention on specific substances.
Roughly 5,000 to 6,000 reporting sites across the United States participate in each CDR cycle, spread across a wide range of manufacturing and import locations. That scale gives EPA a genuinely national view of chemical production and trade patterns, which is part of why the agency treats CDR as central to its chemical management work under TSCA.
Waiting until 2028 to think about CDR is a mistake that catches out plenty of otherwise well organized trading operations. The smarter approach starts today, with the data collection window already open.
Consider these steps as a starting checklist:
Map out which chemicals in your current trading portfolio sit on the TSCA Inventory.
Set up per site volume tracking for anything crossing into or being manufactured within the US.
Flag any substances that might fall under the lower 2,500 pound threshold due to active TSCA actions.
Keep documentation organized year by year rather than trying to back calculate volumes later.
Chemical Data Reporting will keep shaping how the US market tracks and evaluates chemicals in commerce. Buyers and suppliers who treat it as an ongoing compliance habit, rather than a once every four years scramble, put themselves in a far stronger position when the 2028 window opens.
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