What does a PFAS-free or biobased label prove?

The question

A facility buyer choosing a cleaner, floor finish or firefighting foam sees "USDA Certified Biobased Product," "Safer Choice," "Green Seal" or "PFAS-free" on the product sheet. Which belongs in a contract file, and what does each one check?

The short answer

Each mark answers one narrow question.

USDA Certified Biobased Product: where the product's carbon comes from. Nothing about toxicity or PFAS.
EPA Safer Choice: a hazard review of every ingredient. Its standard names PFAS only in its packaging rules.
Green Seal: depends on the standard. Current editions of its cleaning-product, floor-care, degreaser and paint standards bar PFAS in the product, and its sanitary-paper standard bars them in papermaking additives; some older certifications have until 2027 to comply.
"PFAS-free": the seller's claim. No federal regulation defines the phrase.
Firefighting foam: military specification MIL-PRF-32725 and its qualified products list, QPL-32725.

The citations

Label	What it tests	What it does not test	Who issues it	How to verify
USDA Certified Biobased Product	Recent biological carbon as a share of organic carbon, by third-party ASTM D6866 radiocarbon test, against the applicable minimum: the designated category's minimum, or 30 percent for a product outside any designated category (7 CFR 4270.4(b), 4270.7)	Toxicity, safety, PFAS	USDA BioPreferred Program	BioPreferred Catalog; USDA notice of certification
EPA Safer Choice	Every ingredient, at any concentration, against health and environmental criteria; also performance, pH, VOCs and packaging	Biobased content; PFAS in the product is not named as a criterion	U.S. EPA	Safer Choice product search
Green Seal	Criteria set by each standard (GS-37, GS-40 and so on); of the six current editions checked, five bar PFAS in the product and GS-1 bars PFAS in papermaking additives	Biobased content (GS-53 only restricts when a product may be labeled biobased); products still certified to an older edition	Green Seal, a nonprofit	Green Seal certified directory; ask the supplier which standard and edition the certification covers
"PFAS-free" (no certification)	Only what the seller's evidence covers	Anything not backed by a test report or signed statement	The seller	Lab report naming method and detection limit, or a signed no-intentionally-added-PFAS statement
MIL-PRF-32725 / QPL-32725 (firefighting foam)	Fire performance, toxicity and PFAS content, with a PFAS test by EPA Method 1633 at qualification	Biobased content; Navy shipboard use; polar-solvent fuels	DoD: Naval Research Laboratory tests, NAVSEA approves	QPL-32725 in DLA's Qualified Products Database

Where each label stops

Biobased. USDA defines biobased content as "the amount of recent, biologically derived organic carbon" in a product, as a percent of its total organic carbon (7 CFR 4270.2). Water and inorganic carbon are excluded, and the category minimum refers to the organic-carbon portion, "and not the entire product" (4270.7(b)). USDA's FAQ adds that more renewable carbon "does not necessarily indicate superior performance, safety, or environmental impact." Part 4270 does not mention PFAS. The letters "FP" on the label mark a product in a designated category that is eligible for the federal purchasing preference (4270.2).

Safer Choice. EPA reviews "all chemical ingredients, regardless of their percentage in the product," against criteria that include cancer, reproductive and aquatic toxicity, and persistence in the environment. The August 2024 edition mentions PFAS only in its packaging criteria, which bar PFAS from being intentionally introduced into primary packaging (4.2.5.3). Read the label as a hazard screen of the formula; it does not report a PFAS test.

Green Seal. The current editions of GS-37 (institutional cleaners), GS-53 (specialty cleaners), GS-40 (floor care), GS-34 (degreasers) and GS-11 (paints and coatings) each bar PFAS in the product, and GS-1 (sanitary paper) bars PFAS in the additives used to make the paper. For GS-11, GS-34 and GS-40, the PFAS criterion came in editions issued March 11, 2025, and products certified to earlier editions have until March 11, 2027 to comply. GS-1's deadline is January 31, 2027. Ask which edition a certificate covers.

"PFAS-free." A full-text search of the electronic Code of Federal Regulations on September 23, 2026 found no use of the phrase. EPA defines PFAS by chemical structure for its TSCA reporting rule only (40 CFR 705.3), and Green Seal uses its own definition. The FTC's Green Guides, which are not binding, treat a "free-of" claim as appropriate despite a trace amount if, among other conditions, the substance "has not been added intentionally" (16 CFR 260.9(c)). A manufacturer's statement covers the recipe; a test report covers the tested sample, down to the method's detection limit.

Firefighting foam. MIL-PRF-32725 (Amendment 2, June 5, 2024) defines "fluorine-free" as a concentrate containing "a maximum of 1 ppb PFAS" (6.5.6). To qualify, a foam must return non-detect results under EPA Method 1633 at a DoD-accredited lab, and the manufacturer certifies in writing that PFAS was not intentionally added (4.5.7). The QPL, last updated September 15, 2026, lists seven products from four manufacturers; the newest was approved September 9. All are for land-based, fresh-water use, not Navy ships or polar-solvent fuels. Congress has since changed DoD's own purchasing limit for firefighting foam from PFAS "in excess of one part per billion" to "detectable" PFAS (Pub. L. 119-60, sec. 315), while the specification still says 1 ppb. DoD's own documents do not yet agree on when the new limit takes effect: a waiver it has notified to Congress would delay it, but its contracting rules have not been revised to match. Check which figure, and which date, a DoD solicitation carries.

Model language you can copy

For a solicitation or request for quotes:

"For each product the offeror describes as biobased, certified or PFAS-free, identify the certification, standard or listing claimed (for example, USDA Certified Biobased Product, EPA Safer Choice, Green Seal GS-37, or QPL-32725) and provide the certificate, notice of certification or registry listing, including the standard's edition where one applies. For any product described as PFAS-free, provide either (a) a laboratory test report naming the test method, the laboratory and the method detection limit, or (b) the manufacturer's signed statement that no PFAS has been intentionally added, stating the definition of PFAS used. A label or product description without these documents will not be accepted as evidence of the claim."

For the contract file:

"Product: [name, manufacturer, part number]. Claim: [label or wording]. Evidence: [certificate / listing / test report / manufacturer statement], dated [date], from [issuer]. Registry checked: [BioPreferred Catalog / Safer Choice product search / Green Seal directory / QPL-32725] on [date]; listed: [yes/no]; standard and edition: [ ]. PFAS evidence: [method, detection limit, result] or [signed statement, definition used]. Reviewed by [name], [date]."

Replace the bracketed fields.

What to do

Ask for documents, not adjectives: the certificate, listing or test report behind each claim.
Check each claim in the issuing program's own registry on the day you buy, and record the date.
Note the details that limit each label: USDA's certified percentage and "FP" mark, Green Seal's standard and edition, a foam's QPL-32725 scope notes.
For "PFAS-free," record whether you hold a test report (method and detection limit) or a signed statement of no intentional addition.
File the evidence with the purchase record, and don't read one label as proof of another.

Verified: September 23, 2026, against the sources below.