Plastic Claim Substantiation: Evidence Thresholds Under FTC

Written by: Scott Steveson, Specialist

Key Takeaways for Plastic-Related Claims

• Every plastic-related environmental claim must rest on competent, reliable scientific evidence before publication under FTC Green Guides standards.
• Recyclable claims need documented proof that collection programs serve a substantial majority of consumers where the product is sold, plus component-level verification.
• Recycled-content claims require weight-based calculations, chain-of-custody records, and a clear distinction between post-consumer and pre-consumer material sources.
• Compostable and biodegradable claims must spell out tested conditions and qualify language when facilities or environments are not widely available to consumers.
• The Wellness Quality Institute offers independent Plastic-Free Pathway Verification that converts existing laboratory data into scope-locked, registry-linked claims, and you can explore verification options.

Evidence Checklist for a Recyclable Claim

A recyclable claim tells consumers they can divert the product from landfill through a recycling program. The FTC sets a specific, documented threshold for an unqualified claim.

1. Confirm that recycling collection programs accepting the material serve a substantial majority of consumers or communities where the product is sold. If access falls below that threshold, qualify the claim, for example, “recyclable where facilities exist.”
2. Document the material type and resin identification code for every component of the package, not just the primary structure.
3. Verify that each component is accepted by the programs counted toward that threshold. Acceptance of one material does not imply acceptance of all.
4. Retain evidence that the material is actually collected, sorted, and processed, not just theoretically capable of being recycled. Litigation in 2026 shows how regulators and courts now examine the gap between theoretical recyclability and real-world processing.
5. For multi-component packages, qualify the claim to the specific component that is recyclable. 16 CFR 260.13 Example 4 explains that a claim covering the whole package is deceptive when only one component qualifies.
6. Document the basis for the claim in writing and retain it. The FTC’s 2014 action against N.E.W. Plastics Corp., which alleged that the company’s products were not recyclable because they failed to meet the substantial majority threshold, shows how enforcement follows when documentation cannot support the claim made.
7. Review the claim against current program data on a regular schedule. Recycling infrastructure changes, and a claim that was accurate at launch may become unsupported.

Active litigation reinforces this checklist. Two putative class actions were filed in 2026 challenging K-Cup recyclability claims.

Evidence Checklist for a Recycled-Content Claim

Recycled-content claims state that a product or package includes material recovered from the waste stream. The FTC separates two categories: post-consumer recycled content (PCR), which is material recovered after a consumer has used and discarded it, and pre-consumer or post-industrial recycled content (PIR), which is manufacturing waste diverted before it ever reached a consumer.

1. Identify whether the recycled material is post-consumer or pre-consumer and match the claim language. Vague statements such as “made with recycled materials” without a percentage do not satisfy FTC guidance.
2. Calculate the recycled content percentage by weight using the formula: (recycled material weight ÷ total item weight covered by the claim) × 100. Match the calculation scope to the exact claim. A “bottle body” claim requires the calculation to cover only the bottle body, not the cap or label.
3. For pre-consumer content, substantiate that the material would otherwise have entered the waste stream. Spilled raw material or in-process scrap reused in the same production line does not qualify.
4. Obtain supplier recycled-content declarations, certificates of analysis, and chain-of-custody records from the resin supplier or converter. A complete chain-of-custody file includes pickup confirmation, transport records, facility receipt with weight confirmation, and final disposition records.
5. Retain purchase orders, invoices, and batch or lot records that connect the claimed percentage to specific material deliveries.
6. For multi-component packages, limit the claim to the component that contains recycled material unless the weighted average across all components by total package weight supports a broader claim. 16 CFR 260.13 Example 6 permits a “30% recycled material” claim on a frozen dinner package when the weighted average across components equals 30%.
7. For food-contact packaging, confirm FDA clearance before using post-consumer recycled plastic and before making any claim about it.
8. Consider third-party certification against ISO 14021 from an accredited body to convert supplier documentation into independently reviewed evidence.

Evidence Checklist for a Compostable Claim

Compostable claims state that a product will break down into usable compost under defined conditions. The FTC requires that the claim spell out those conditions when they are not widely available.

1. Test the product to ASTM D6400 for plastics or ASTM D6868 for biodegradable coatings on paper or fiber substrates. Both standards require at least 90% conversion of organic carbon to CO₂ within 180 days under controlled industrial composting conditions, at least 90% disintegration through a 2 mm sieve at 84 days, and no adverse effects on plant growth or heavy metal concentrations above defined limits.
2. Confirm the composting environment used for testing. ASTM D6400 covers industrial or municipal composting only, not home composting. Home compostability needs separate testing to a standard such as TÜV Austria OK Compost HOME.
3. Qualify the claim to match the tested environment. If breakdown occurs only in industrial facilities, the claim must be qualified as “compostable in industrial facilities” and must note that such facilities may not be available in all areas.
4. Verify consumer access to the relevant composting infrastructure. Approximately 35.9% of the sampled U.S. population has access to composting programs as of 2025, which limits the practical reach of an unqualified compostable claim for most products.
5. Retain the test report, the testing laboratory’s accreditation documentation, and the specific product or component tested. The claim applies only to what was tested, not to the entire product line.
6. Monitor state-level legislative developments. State bills, such as one passed by the California Assembly 64-1 in 2026, would prohibit “compostable” or “home compostable” labels on products containing plastic beginning January 1, 2027, if enacted. These state rules can impose requirements beyond the FTC baseline.

Evidence Checklist for a Biodegradable Claim

Biodegradable claims face frequent challenges because the FTC standard is strict and most plastic packaging cannot meet it under real-world disposal conditions.

1. Show that the entire product or package will completely break down and return to nature within one year after disposal under the conditions of customary consumer disposal. For most packaging, that means a landfill, which is an anaerobic, low-moisture environment where very few materials biodegrade within any defined timeframe.
2. Retain scientific evidence, such as test data, peer-reviewed studies, or expert analysis, demonstrating complete breakdown within one year under those specific conditions. General claims of biodegradability without condition-specific evidence do not satisfy the FTC standard.
3. Do not rely on ASTM D6400 or D6868 test results alone to support a biodegradable claim. Those standards measure performance under industrial composting conditions, not landfill conditions.
4. Qualify the claim if breakdown occurs only under specific conditions that most consumers cannot access. An unqualified “biodegradable” claim implies breakdown under ordinary disposal conditions.
5. Recognize that the FTC has taken enforcement action against manufacturers for making unsubstantiated biodegradable and compostable claims, which provides a concrete example of enforcement consequences.

Consequences of Unsubstantiated Plastic Claims

The enforcement landscape for plastic-related environmental claims has expanded significantly. Three risk channels now operate at the same time.

FTC enforcement. The FTC pursues unsubstantiated environmental claims as unfair or deceptive acts or practices under Section 5 of the FTC Act. The 2014 action against N.E.W. Plastics Corp. required removal of unsubstantiated recycled-content and recyclability claims. This federal enforcement channel operates alongside two additional risk vectors.

NAD review. The National Advertising Division reviews environmental claims against the same competent-and-reliable-evidence standard the FTC applies, which creates a second enforcement pathway that operates independently of federal action. NAD’s approach, illustrated across recent cases, focuses on whether the evidence supports the exact message a reasonable consumer would take from the claim, not just the literal words used.

Class-action litigation. The K-Cup cases mentioned earlier illustrate a broader pattern. Plaintiff attorneys are actively pursuing plastic-related claims that cannot be substantiated. Retailer scrutiny follows the same logic. A claim that cannot survive a buyer’s diligence request creates supply-chain exposure before any litigation begins.

Protect your brand from enforcement risk with WQI Plastic-Free Pathway Verification, which turns your existing lab data into defensible claim language.

How to Build a Plastic Claim Substantiation Dossier

Given the enforcement risks above, including FTC action, NAD review, and class-action litigation, the practical defense is a complete substantiation dossier assembled before any claim goes public. The following checklist covers the elements that survive scrutiny across all three channels.

A substantiation dossier is the organized file of evidence that supports a specific claim. The following 10-item checklist covers the elements that withstand NAD, class-action, or retailer scrutiny for plastic-related claims.

1. Laboratory qualification. Confirm the testing laboratory’s accreditation, such as ISO/IEC 17025 with the relevant method and matrix explicitly within the accredited scope, or state-specific accreditation for microplastics methods. Retain the accreditation certificate.
2. Analytical method documentation. Identify the specific method used, for example SWB-MP1-rev1 infrared spectroscopy, SWB-MP2-rev1 Raman spectroscopy, micro-FTIR, or pyrolysis GC/MS, and confirm it is appropriate for the product matrix being tested.
3. Particle-size range tested. Document the validated detection range of the method. For Raman spectroscopy aligned with certain state methods, that range is greater than 20 µm through 5,000 µm. For infrared spectroscopy aligned with other state methods, it is greater than 50 µm through 5,000 µm. The claim is bounded by what the method can detect, not by what it cannot.
4. Polymer panel. List every polymer type the analysis screened for. A minimum defensible panel includes polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), polyamide (PA), polycarbonate (PC), and polymethyl methacrylate (PMMA), plus a reporting category for unidentified particles with no spectral match.
5. Blank and contamination controls. Retain blank results showing the laboratory’s background contamination levels. A “none detected” result is meaningful only when blank data confirms the method’s contamination floor.
6. Spike recoveries and replicates. Document spike recovery data, which confirms the method can find what it is looking for, and replicate results, which confirm reproducibility.
7. Chain of custody. Retain the complete chain-of-custody record from sample collection through laboratory receipt and analysis, including sample collection date, collector identity, transport conditions, and laboratory receipt confirmation.
8. Reporting limits. Document the method’s reporting limit for each polymer type. A result reported as “not detected” means not detected above the reporting limit, not absent. State the reporting limit alongside any non-detect result.
9. Product scope and production period. Define exactly which product, SKU, matrix, and production lot or sampling period the dataset covers. A result from one lot does not extend to the product line or to later production.
10. Data recency and claim expiration. Record the sampling date and set a review schedule. Testing data ages as production conditions change. A verification period of 24 months from the sampling date of the most recent accepted dataset provides a reasonable framework for keeping claims current.

The following table consolidates the primary standards, test conditions, and material scope requirements across all five claim categories covered in this article. Use it as a quick reference to identify which framework applies to your specific claim type.

Claim-Type Evidence Reference Table

Claim Category	Primary ASTM/ISO Standard	Particle-Size Range or Test Condition	Polymer Panel or Material Scope
Recyclable	No single ASTM standard, FTC 16 CFR 260.12, APR Design Guide	60% consumer access threshold, material accepted by programs serving that population	All components of the package, each resin type documented separately
Recycled Content	ISO 14021, 16 CFR 260.13, chain-of-custody per ISO/IEC 17025 or APR	Percentage by weight, pre-consumer vs. post-consumer distinguished	Specific resin type, such as rPET, rHDPE, rPP, with food-contact FDA clearance where applicable
Compostable (Industrial)	ASTM D6400 for plastics, ASTM D6868 for coated paper or fiber	At least 90% CO₂ conversion within 180 days, at least 90% disintegration through 2 mm sieve at 84 days, industrial composting conditions of roughly 60–71°C	Full product or component tested, heavy metals below defined limits, no adverse ecotoxicity
Compostable (Home)	TÜV Austria OK Compost HOME, AS 5810	Lower-temperature backyard composting conditions, longer timeframe than industrial	Full product or component tested, separate certification from industrial compostable
Biodegradable	No single ASTM standard accepted by FTC for landfill conditions, 16 CFR 260.8	Complete breakdown within one year under customary disposal conditions, typically landfill	Entire product or package, condition-specific evidence required
Microplastic-Content / Plastic-Reduction (Pathway)	State Water Board methods using infrared above 50 µm and Raman above 20 µm, ISO 16094-2:2025, ISO 24187:2023	Tested range stated explicitly, 1–20 µm fraction not validated under either state method, nanoplastic range below 1 µm beyond current reliable commercial measurement	Minimum panel of PE, PP, PET, PS, PVC, PA, PC, PMMA, unidentified particles reported separately, visual identification alone insufficient, chemical confirmation required

Microplastic-Content Claims and Detection Limits

Microplastics are plastic particles smaller than 5 millimeters. Nanoplastics are particles smaller than 1 micrometer, roughly a thousandth of a millimeter. This distinction matters for claim substantiation because the two size categories sit in very different places relative to what laboratory methods can currently measure.

State water boards define microplastics in drinking water as solid polymeric material with particles having at least three dimensions greater than 1 nanometer and less than 5,000 micrometers. The best validated analytical methods, infrared spectroscopy and Raman spectroscopy, begin at 50 µm and 20 µm respectively. The fraction between 1 and 20 µm is not validated under either method. Everything below 1 µm, the entire nanoplastic range, is currently beyond reliable commercial measurement.

This gap has a direct consequence for claim language. A result reported as “no microplastics detected” means no particles were found above the method’s detection floor, for the polymers screened, in the lot tested. It does not mean no particles are present. A 2018 study led by Sherri Mason at the State University of New York at Fredonia, published in Frontiers in Chemistry, found microplastics in 93% of 259 bottled water samples across eleven brands, with polypropylene, the material used in bottle caps, as the most commonly identified polymer. A peer-reviewed 2018 study by Kosuth, Mason, and Wattenberg in PLOS ONE found anthropogenic particles in 81% of 159 tap water samples sourced across five continents. Detection can establish presence. It cannot establish absence.

The World Health Organization’s 2019 assessment, Microplastics in Drinking-Water, found low concern for health risk at current levels on the limited evidence available, while stressing that the conclusion rests on incomplete information and that more research is urgently needed. Detection of a particle is not the same as proof of harm, and content should not conflate the two.

For brands making any claim that touches microplastic content, the practical requirement is scope-locked language. That means a statement that identifies the tested particle-size range, the polymer panel screened, the analytical method, and the production period covered. A claim that implies the product contains no plastic in any form, at any size, is a claim the science cannot currently carry and one that carries significant legal exposure.

WQI Plastic-Free Pathway Verification Program

The Wellness Quality Institute (WQI) is an independent verification body that reviews companies’ existing third-party laboratory data on plastic and microplastic content against a defined standard. This review helps brands substantiate real progress toward plastic-free standards instead of making impossible zero-plastic claims.

WQI’s core program, Plastic-Free Pathway Verification (PFPV), is governed by the standard WQI-CS-01. The review examines laboratory qualification, analytical method, product matrix, sampling, tested particle-size range, target polymer panel, reporting limits, blank results, spike recoveries, replicates, chain of custody, data recency, and product scope. These are the same elements covered in the substantiation dossier checklist above. WQI does not perform laboratory testing. It reviews the dataset a company’s qualified independent laboratory has already produced.

Two outcomes are possible. Standard Met requires that the dataset satisfies all applicable technical and data-quality requirements and that no reportable target polymer particles are detected within the tested particle-size range and approved reporting limits. A non-detect result alone is not enough. The reporting limits themselves must meet WQI requirements. Standard Met unlocks a scope-locked license to use the approved mark “WQI Plastic-Free Pathway Verified,” a public registry listing, and approved claim language tied to the specific reviewed evidence. Standard Not Met is a private outcome. It carries no public claim, no logo rights, and no registry listing, and it is never described as a failed product. It may reflect insufficient data, an unsupported method, or incomplete scope rather than anything about the product itself, and the company may resubmit.

Every public verification claim must include or link to a registry ID. The registry entry records the verified party, product scope, matrix, production or sampling period, tested particle-size range, lower method limit, polymer panel, reporting limits, testing laboratory and its accreditation, verification and expiration dates, and current status. The claim becomes checkable rather than simply assertable.

Approved claim language is specific. The mark “WQI Plastic-Free Pathway Verified” may be used only for Standard Met products, within the registered scope, accompanied by access to the Verification Scope record. It may not imply plastic-free, microplastic-free, nanoplastic-free, zero plastic, state approval, government certification, or health or safety certification. The word “pathway” is never optional because it carries the meaning that separates a defensible claim from a prohibited one.

WQI’s review criteria align with state water board drinking-water microplastics reference frameworks, which are the most stringent public reference reasonably applicable to testing today. States did not create, approve, authorize, or endorse WQI or its standard. Alignment with state frameworks serves as a technical reference point, not a geographic boundary or a government endorsement. Verification is available to US companies nationally.

A single assessment fee covers review, verification decision, and registry listing, with no separate mark-license or registry fee. Independent laboratory testing is arranged and billed separately by a qualified independent laboratory. Payment of the assessment fee does not guarantee a verification decision.

WQI Plastic-Free Pathway Verification does not certify that a product contains zero plastic, microplastics or nanoplastics. It shows that the company is on a verified pathway toward plastic-free standards. Verification applies only to the reviewed products, submitted datasets, tested ranges, polymer panels, production or sampling periods, and supporting controls. WQI verification is not a state approval, government certification, or health or safety certification.

Start your Plastic-Free Pathway Verification with WQI for an independent review of your existing dataset and registry-linked claim language you can stand behind.

Frequently Asked Questions

Reasonable Basis Standard for Plastic-Related Environmental Claims

The reasonable basis standard, as applied by the FTC under the Green Guides, requires that a marketer hold competent and reliable scientific evidence before making any environmental claim, including any claim that touches recyclability, recycled content, compostability, biodegradability, or plastic content. Competent and reliable scientific evidence means tests, studies, or other objective data conducted and evaluated by qualified people using methods that experts in the relevant field would accept as accurate and reliable. The standard applies to both express claims, such as a stated percentage of recycled content, and implied claims, such as a recycling symbol used without qualification. A company cannot make the claim first and gather evidence later. The evidence must exist before the claim is published.

How Microplastic or Plastic-Reduction Claims Differ from Recyclable or Recycled-Content Claims

Recyclable and recycled-content claims are supported by established infrastructure, including defined ASTM standards, third-party certification programs, and documented chain-of-custody frameworks. Microplastic and plastic-reduction claims operate in a category where no equivalent gold standard exists. The analytical methods available today cannot detect every particle size or polymer type, and no laboratory can confirm the complete absence of plastic in a product. This reality means any claim that touches microplastic content must be scope-locked, explicitly bounded by the tested particle-size range, the polymer panel screened, the analytical method used, and the production period covered. An unqualified “microplastic-free” or “plastic-free” claim is not supportable under current science and carries significant legal exposure.

Consequences of Making an Unsubstantiated Recyclable or Plastic-Related Claim

Three enforcement channels operate at the same time. The FTC can pursue unsubstantiated environmental claims as unfair or deceptive acts under Section 5 of the FTC Act, with civil penalties per violation. The National Advertising Division reviews claims against the same competent-and-reliable-evidence standard and can recommend discontinuation or modification. Class-action plaintiff attorneys are actively filing suits against brands whose plastic-related claims cannot be substantiated, with multiple putative class actions challenging single-product recyclability claims in 2026 alone. Retailer and procurement scrutiny adds a fourth channel. A claim that cannot survive a buyer’s diligence request creates supply-chain exposure before any litigation begins.

How Independent Verification Differs from Publishing a Laboratory Report Directly

A laboratory report tells a company what a laboratory found. It does not, on its own, tell the market what that finding supports, whether the method was appropriate for the product matrix, whether reporting limits are adequate, whether contamination controls were run, or what claim the data can actually carry. Self-reported results are structurally discounted by buyers, retailers, and regulators because the company interpreting its own data has an obvious interest in the interpretation. Independent verification, meaning review by a third party with no commercial interest in the outcome and no role in the testing, converts a laboratory dataset into a reviewed finding with approved claim language attached. The independence is the product because it allows a claim to carry weight that self-reporting cannot achieve.

Conclusion: Turning Evidence into Defensible Plastic Claims

Every plastic-related environmental claim, including recyclable, recycled-content, compostable, biodegradable, or any claim that touches microplastic content, requires a reasonable basis of competent and reliable scientific evidence before it is made. The evidence thresholds are specific. Recyclable claims rely on a 60% consumer access threshold. Recycled-content claims rely on weight-based percentage calculations with chain-of-custody documentation. Compostable claims rely on ASTM D6400 or D6868 test results with facility qualification. Biodegradable claims rely on complete one-year breakdown evidence under customary disposal conditions. For microplastic and plastic-reduction claims, the requirement is scope-locked language that accurately reflects what the method can and cannot detect because no laboratory today can confirm the complete absence of plastic across every particle size and polymer type.

The Wellness Quality Institute exists to close the gap between real laboratory data and a claim a company can confidently stand behind. WQI’s Plastic-Free Pathway Verification independently reviews a company’s existing dataset against defined criteria aligned with state water board drinking-water microplastics reference frameworks and issues scope-locked, registry-linked claim language that reflects what the evidence supports and nothing more.

Get started with WQI Plastic-Free Pathway Verification today.