What "Compostable" on Disposable Plates Actually Means

What the FTC says the word has to mean

The rule is in the FTC’s Green Guides, the commission’s guidance on environmental marketing claims, and the section on compostable claims is short. “It is deceptive to misrepresent, directly or by implication, that a product or package is compostable.” A marketer making the claim “should have competent and reliable scientific evidence that all the materials in the item will break down into, or otherwise become part of, usable compost (e.g., soil-conditioning material, mulch) in a safe and timely manner (i.e., in approximately the same time as the materials with which it is composted) in an appropriate composting facility, or in a home compost pile or device.”

Two words in that sentence do most of the work. “All” means the whole plate, including any coating or lining, and “timely” is pinned to the food scraps the plate is composted with rather than to any number of months. A plate that leaves a lining behind, or that breaks down long after the apple cores around it, does not meet the guide’s own definition.

The guide then says when the claim has to be qualified. A marketer “should clearly and prominently qualify compostable claims to the extent necessary to avoid deception” if “the item cannot be composted safely or in a timely manner in a home compost pile or device,” or if “the claim misleads reasonable consumers about the environmental benefit provided when the item is disposed of in a landfill.” And it adds a third condition about where composting facilities exist. A marketer “should clearly and prominently qualify compostable claims if such facilities are not available to a substantial majority of consumers or communities where the item is sold.” The commission’s Example 3 is the one that applies to most certified plates. “Although municipal or institutional composting facilities exist where the product is sold, the package will not break down into usable compost in a home compost pile or device. To avoid deception, the manufacturer should clearly and prominently disclose that the package is not suitable for home composting.”

What the BPI mark adds

The Biodegradable Products Institute runs the certification most compostable plates and cutlery carry in the United States, and its own description of the program is specific about what the mark covers. “BPI uses ASTM D6400 as the base standard for assessment for all items going through the BPI Certification process,” with optional assessment against ASTM D6868 and D8410 for eligible items. The institute calls the program “commercial compostability certification,” which is the qualifier the FTC asks for, stated in the name.

Three things sit on top of the standard. The first is a rule about fluorinated chemicals, the PFAS class used to make paper grease-resistant, which “went into effect on January 1, 2020.” Since then, “products may no longer be claimed as BPI-certified unless they meet all conditions of the rule, including no intentionally-added fluorinated chemicals, a test report showing less than 100 ppm total organic fluorine.” The second is labeling. The institute reviews “every piece of product and packaging artwork to make sure that the BPI Certification Mark is present.” The third is a list. “Every BPI-certified item can be referenced in a searchable, online product catalog,” which is how a reader checks a plate’s claim against the certifier rather than against the package.

Home composting is a separate certification, and a new one. “Launched in 2025, BPI’s Home Compostability Certification Program is based on the French Standard NF T 51-800,” and commercial certification “is a prerequisite” for it. The institute’s page on home composting is also plain about the limits: “While BPI has certified products for home compostability, composting results are not guaranteed, as they are reliant on robust composting conditions and management practices.” Its own field testing found home piles across North America held “between 68°F-102°F” on average, and it recommends tearing or shredding larger items before adding them.

What to look for on the package

Three things, each of which follows from the two sources above. The certification mark itself, since a bare “compostable” with no mark has no third party behind it, and the FTC puts the burden of evidence on the marketer. The word “commercial” or “industrial” near the claim, which is the qualifier the FTC expects when a plate is not meant for a backyard pile, and which BPI’s own program name carries. And, for a plate meant for a home pile, a separate home compostability mark, which before 2025 did not exist from BPI at all.

What none of this answers is whether a composting facility near you accepts plates. The FTC’s own guide says the claim should be qualified where facilities “are not available to a substantial majority of consumers,” and BPI’s labeling page notes that contamination from look-alike non-compostable packaging “has led some composters to discontinue accepting even certified compostable items.” The plate can be certified and the bin can still say no.

Where this comes from

Every statement above is quoted from two sources, read on October 10, 2026: the FTC’s Green Guides as published in the Code of Federal Regulations at 16 CFR 260.7, and the Biodegradable Products Institute’s own pages on its commercial compostability certification, its labeling rules and home composting. Runlow has not tested any plate, holds no product records for disposable plates or cutlery yet, and makes no claim about whether any particular product composts. When records exist, each plate’s certification will render from its record, checked against BPI’s own catalog, the way every certification on this site is recorded.