How to Prevent Greenwashing with Verified Plastic Claims

Written by: Scott Steveson, Specialist, Wellness Quality Institute

Key Takeaways for Water and Beverage Brands

• Lab results stating “none detected” describe what the test could see, not an absolute “plastic-free” product, without independent review.
• Red-flag language such as “microplastic-free” or “100% recyclable” needs documented proof tied to test methods, particle sizes, and production dates.
• Brands need to compare existing lab data against WQI-CS-01 criteria, including particle-size range, polymer panel, reporting limits, blanks, and chain of custody.
• Independent verification under WQI-CS-01 turns raw lab reports into scope-locked, publicly checkable claims that stand up to regulators and retailers.
• Learn how The Wellness Quality Institute can help your brand turn verified lab data into defensible claims at The Wellness Quality Institute.

Step 1: Spot Red-Flag Language and Missing Proof in Your Plastic Claims

The Wellness Quality Institute sees most greenwashing risk for water and beverage brands arise from vague or absolute language, not from intentional fraud. Claims can sound precise while offering no clear scope, which means they fail the moment a retailer, journalist, or lawyer asks for proof.

Brands can start by auditing packaging and marketing materials for red-flag terms such as:

• “Plastic-free”, an absolute claim that no current laboratory method can support across every particle size, polymer type, and production lot.
• “Microplastic-free”, which faces the same detection limits, because a non-detect result reflects the method’s floor, not the entire product.
• “Eco-friendly,” “natural,” or “green”, which the FTC Green Guides (16 CFR § 260.3) treat as potentially deceptive when not tied to a specific, proven attribute.
• “100% recyclable”, a claim that has drawn global regulatory action; for example, a July 2026 complaint in D.C. Superior Court challenged a bottled-water brand’s use of “completely recyclable” without supporting evidence.
• “Tested for microplastics”, which only describes that a test occurred. The method, detection floor, polymer panel, and production scope determine what the result actually supports.

Each of these red-flag terms carries legal and reputational stakes that extend beyond marketing copy. The legal and reputational stakes are real. The FTC requires that environmental claims rest on competent and reliable scientific evidence, and some states require written proof files for any environmental statement on consumer goods, with records available to the public on request. A 2020 European Commission review found that 53.3% of environmental claims were unclear, misleading, or deceptive, which helped shape the EU Green Claims Directive and signals where US enforcement is heading.

Audit your current claims against red-flag language — talk to WQI about verification

Step 2: Compare Your Lab Data to WQI-CS-01 Microplastics Criteria

Many brands already hold useful microplastics test reports. The key question is whether those reports meet the minimum requirements needed to support any claim. The Wellness Quality Institute’s review standard, WQI-CS-01, aligns with a state drinking-water microplastics reference framework, which is currently the strictest public reference for this testing. That framework acts as a technical benchmark, not a geographic limit, and WQI verification is available to US companies nationwide.

When mapping existing data against minimum review criteria, brands should check whether their dataset addresses each of the following six technical requirements, because missing information in any one area can undermine an otherwise strong test:

• Tested particle-size range: The reference methods cover particles from 20 µm (micrometers) to 5,000 µm using Raman spectroscopy (method SWB-MP2-rev1) and from 50 µm to 5,000 µm using infrared spectroscopy (method SWB-MP1-rev1). The 1–20 µm range is not validated under either method, and particles below 1 µm, called nanoplastics, remain beyond reliable commercial measurement. A result cannot speak to particles the method cannot detect.
• Polymer panel: WQI-CS-01 requires a minimum panel that includes polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), polyamide (PA), polycarbonate (PC), and polymethyl methacrylate (PMMA). Reports must also list other confirmed polymers and particles with no spectral match.
• Reporting limits: A non-detect result only has meaning if the reporting limit, which is the lowest concentration the method can measure reliably, meets WQI requirements. A non-detect above a weak reporting limit cannot support a claim.
• Blank data and contamination controls: Blank samples, which are clean reference samples run alongside test samples, must show that detected particles come from the product rather than the lab environment. A 2024 PNAS commentary on a high-profile nanoplastics study highlighted how contaminated blanks and weak quality control can invalidate striking results, which is why WQI-CS-01 requires strong controls.
• Chain of custody: Documentation must track each sample from collection through analysis, so reviewers can trust that the reported result matches the product tested.
• Particle counts by size fraction: Counts need to appear by size fraction, not as a single total number. Visual identification alone is not enough; counted particles must be chemically confirmed.

These technical requirements reflect the same level of diligence legal advisors recommend before making any microplastics claim. As legal counsel at Alston & Bird has advised, companies need to understand what a test actually measures, including detection and reporting limits, particle-size range, and whether test conditions mirror real-world use, before they make product claims about microplastics.

See if your existing lab data meets WQI-CS-01 criteria — start your review

Step 3: Check Whether Your Laboratory Meets WQI Qualification Tiers

The Wellness Quality Institute cannot review every microplastics dataset on the market, because not every laboratory produces data that meets WQI-CS-01. Qualification depends on accreditation tier, not brand reputation. Brands that understand these tiers before commissioning tests avoid paying for results that cannot support verification.

WQI recognizes three laboratory qualification tiers under WQI-CS-01:

1. Preferred: Laboratories accredited under an Environmental Laboratory Accreditation Program (ELAP) for the specific microplastics method. This tier provides the highest confidence for the methods WQI reviews.
2. Accepted: ISO/IEC 17025-accredited laboratories, which follow the international standard for testing competence, where the microplastics method and the product matrix, such as bottled water, appear explicitly in the accredited scope. General ISO/IEC 17025 accreditation alone does not qualify a lab.
3. Conditional: Other independent laboratories that WQI accepts only after a documented method-equivalence review and technical approval on a case-by-case basis.

Microplastics testing capacity remains limited, because the instruments are expensive and performance varies between labs and even between instruments in the same lab. Confirming that a laboratory meets one of these tiers before testing protects the budget and keeps results usable for verification.

Confirm your laboratory qualifies before testing — talk to WQI

Step 4: Submit Your Dataset for Independent WQI-CS-01 Review

Independent review turns a lab report into a claim that buyers and regulators treat as credible. Self-reported results, even when based on strong testing, still look like marketing because the company grading its own homework has a clear interest in the outcome. A YouGov survey cited in packaging industry analysis found that 55% of US consumers doubt brands’ sustainability claims, and that skepticism extends to plastic language on water products.

The WQI submission process under WQI-CS-01 covers a single assessment. The company submits its independent lab dataset, method documentation, product scope, and quality-control records. The Wellness Quality Institute does not run the lab tests, which preserves independence. During review, WQI examines:

• Laboratory qualification against the relevant accreditation tier
• Analytical method suitability for the specific product matrix
• Sampling design and chain of custody
• Tested particle-size range and how it relates to the method’s validated floor
• Completeness of the target polymer panel
• Reporting limits and whether they are adequate
• Blank results, spike recoveries, and replicates
• Data recency and the production or sampling period
• Definition of the product scope

A single assessment fee covers the review, verification decision, and registry listing. WQI does not charge a separate mark-license or registry fee. Independent lab testing is arranged and billed by the qualified laboratory. Paying the assessment fee does not guarantee a Standard Met decision.

Submit your dataset for independent review under WQI-CS-01

Step 5: Understand Your Standard Met or Standard Not Met Result

Every Wellness Quality Institute review ends with one of two clear outcomes. WQI does not issue partial approvals, provisional statuses, or ambiguous decisions.

Standard Met requires two conditions together. The dataset must satisfy all relevant technical and data-quality requirements, and the tests must show no reportable target polymer particles within the tested particle-size range and approved reporting limits. Both conditions must be satisfied because a non-detect result alone is not enough. If the reporting limits do not meet WQI requirements, the non-detect carries no evidentiary weight, regardless of what the lab report states.

Standard Not Met applies when one or more requirements remain unsatisfied. Reasons can include reportable particles, reporting limits above requirement, incomplete data, weak blanks or contamination controls, unsupported methods, missing chain of custody, laboratory qualification gaps, incomplete polymer analysis, or unclear product scope. The outcome comments on the evidence, not on the product’s overall safety or quality.

A Standard Not Met outcome remains private. It does not grant public claims, logo rights, or a registry listing, and WQI never describes it as a failed product. Companies can submit corrected or additional information later. Participating in the process creates no public downside, because many Standard Not Met outcomes reflect testing design rather than the product itself.

Required disclaimer: 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 government certification, or health or safety certification.

Understand the verification outcome process — talk to WQI

Step 6: Use Approved Claim Language and Registry IDs Within the Verified Scope

A Standard Met outcome unlocks three practical tools. The company receives a scope-locked license to use the mark “WQI Plastic-Free Pathway Verified,” a public registry listing with a unique ID, and approved claim language that matches the reviewed evidence.

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, registry ID, approved result statement, and current status. Every public verification claim must include or link to the registry ID, which allows retailers and consumers to check the claim instead of taking it on faith.

Scope lock defines how the program protects both brands and buyers. Verification applies only to the reviewed product, dataset, tested particle-size range, polymer panel, and production period. To keep that scope clear, WQI prohibits the following extensions without exception:

• Extending a single product’s result to an entire product line or to the company
• Implying the product is plastic-free, microplastic-free, nanoplastic-free, or zero plastic
• Describing the outcome as a certification or the product as certified
• Implying government approval, government certification, or health or safety certification
• Implying that The Wellness Quality Institute performed the laboratory testing

The verification period lasts 24 months from the sampling date of the most recent accepted dataset. Continued claim use after that date requires re-verification with current data. Expired registry entries remain visible and marked “Expired,” which keeps the public record honest over time.

Get scope-locked claim language you can stand behind — start verification

Frequently Asked Questions

What makes a plastic or microplastic claim unsubstantiated, and what are the legal consequences?

A plastic claim is unsubstantiated when language such as “plastic-free,” “microplastic-free,” “eco-friendly,” or similar phrases lacks competent and reliable scientific evidence tied to the specific product, method, and production period. The FTC standard mentioned in Step 1, competent and reliable scientific evidence, translates to proof that is objective, conducted by qualified experts, and accepted in the relevant scientific fields. A lab report alone does not meet this bar if the detection floor, polymer panel, or sampling scope remains undisclosed and unreviewed by an independent party.

Legal exposure appears at several levels. The FTC can pursue deceptive environmental claims at the federal level. Some states require written substantiation files for any environmental statement on consumer goods, and violations can qualify as misdemeanors. Civil class actions have also produced multi-million-dollar settlements when recyclability or sustainability claims lacked support. Reputational damage, including retailer delisting, negative media coverage, and consumer backlash, often arrives before formal enforcement.

What criteria distinguish a credible third-party verification from a self-reported lab result?

Three elements separate credible independent verification from a self-reported result. First, the reviewing body must have no financial stake in the outcome and no role in the testing itself, so independence is built into the structure. Second, the review criteria must be published and anchored to a recognized external framework, which lets buyers, retailers, and regulators see the standard behind the decision. Third, the outcome must be publicly checkable through a registry or similar tool that records the product, method, scope, and period reviewed, not just a logo on a label.

A raw lab report, even a strong one, does not meet these three elements on its own. It records what the lab found but does not interpret what that finding supports or give outsiders a way to verify the claim without trusting the brand’s word. The market increasingly distinguishes between a self-asserted claim and a claim that an independent body such as The Wellness Quality Institute has reviewed and approved.

What does regulatory substantiation require for a “none detected” result on a water product?

A “none detected” result on a microplastics test is a bounded statement that reflects the method’s limits. It means the lab did not find particles above the instrument’s detection floor, for the polymers in the test panel, in the specific lot sampled. Regulatory substantiation, under the FTC’s competent and reliable scientific evidence standard, requires that any claim match what this result truly supports, including its limits.

For a “none detected” result to support a market claim, the substantiation file should cover the analytical method and its validated detection range, the polymer panel, the reporting limit and whether it meets the threshold for the claim, blank data showing the lab did not introduce contamination, chain-of-custody records, and the production or sampling period. A claim that suggests broader absence than the method can detect, such as implying the product contains no plastic when the method only covers particles above 50 µm, misrepresents the evidence even if the “none detected” finding itself is accurate.

Conclusion: Turn Real Lab Data Into Claims That Survive Scrutiny

The six steps above show the path between a lab report and a defensible market claim. That path matters because it separates language that holds up under review from language that creates legal, regulatory, and reputational risk.

The Wellness Quality Institute’s Plastic-Free Pathway Verification closes this gap. The program converts real laboratory data into reviewed, scope-locked, publicly checkable claims without stretching results beyond the product, dataset, particle-size range, polymer panel, or production period the evidence supports. The service is available to US water and beverage brands nationwide. A company on a verified pathway toward plastic-free standards gains more than a bold-sounding promise; it gains a claim it can stand behind.

Start your Plastic-Free Pathway Verification today