In September 2021, California passed Assembly Bill 1200, which prohibited the intentional addition of per- and polyfluoroalkyl substances (PFAS) to plant-fiber-based food packaging effective January 1, 2023. The ban was significant for two reasons: California is the most populous US state and a major foodware market, and the ban was the most stringent state-level PFAS regulation at the time of passage. Several other states followed with similar legislation.
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The ban changed the compostable foodware industry. Most plant-fiber bowls, plates, and clamshells made before 2022 contained PFAS as grease-resistance treatment. After AB 1200’s effective date, products sold in California had to be PFAS-free. The industry response involved both legitimate reformulation and some marketing claims that turned out to be incomplete.
Here’s what PFAS are, why they were used in foodware, why California regulators chose to ban them, and what the industry response has looked like.
What PFAS are
PFAS — per- and polyfluoroalkyl substances — is a class of approximately 12,000 different chemical compounds that share a common feature: a chain of carbon atoms bonded to fluorine atoms. The carbon-fluorine bond is one of the strongest in chemistry, which gives PFAS their characteristic properties: heat resistance, oil resistance, water resistance, and remarkable persistence.
PFAS were developed starting in the 1940s by industrial chemists looking for compounds with grease-repellent properties. The first commercial use was in Teflon non-stick cookware (the trademarked name “Teflon” refers to PTFE, a specific PFAS compound). Over the following decades, PFAS were incorporated into hundreds of products: firefighting foam, water-repellent clothing, food packaging, carpet stain treatments, electronics manufacturing, and many others.
The same property that makes PFAS useful — chemical stability and persistence — is what makes them problematic environmentally. PFAS don’t break down in the environment over normal timescales. They accumulate in soil, water, and ultimately in the bodies of living organisms.
Why PFAS were used in foodware
Compostable plant-fiber foodware — bagasse, paper, molded fiber — has a fundamental challenge: it absorbs grease. A pure paper plate would soak through with butter or oil within minutes. To make plant-fiber foodware viable for foodservice applications, manufacturers needed a way to make it grease-resistant.
For decades, the industry standard was a PFAS coating. A thin layer of PFAS-based chemical sprayed or applied to the food-contact side of the foodware made it grease-resistant for the duration of typical food service use.
Specifically, the most common PFAS used in foodware were perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), and shorter-chain analogs. These compounds form a thin barrier on the paper or fiber surface that water and grease can’t easily penetrate.
The PFAS treatment was effective. Foodware treated with PFAS could hold hot oily food for hours without leakage. Untreated equivalents would soak through within 30-60 minutes.
The cost was low. A typical PFAS treatment added less than $0.01 per piece to the manufacturing cost. This made PFAS-coated foodware economically competitive with untreated alternatives plus made compostable foodware viable for high-grease applications.
Why California decided to ban
By the 2010s, evidence had accumulated that PFAS pose significant human health risks:
Bioaccumulation. PFAS concentrate in human and animal bodies over time. Levels measured in human blood serum in the US have been measurable in nearly every person tested.
Toxicity. Animal studies and limited human studies link PFAS exposure to cancer (kidney, testicular), thyroid disease, immune system dysfunction, decreased birth weight, and elevated cholesterol. The science is still evolving but the pattern of adverse effects is consistent.
Persistence in environment. PFAS in landfills leach into groundwater. PFAS in incinerator emissions cycle through the atmosphere. Wastewater treatment doesn’t remove PFAS effectively.
Compost contamination. This was the key insight that drove California’s foodware ban. PFAS in foodware that’s commercially composted ends up in finished compost, which is then used in agriculture and gardens. The PFAS doesn’t break down during composting; it remains in the compost and is incorporated into soil. Agricultural soil PFAS contamination from compost is a documented concern.
This last point matters specifically for foodware regulation. A PFAS-coated paper plate that gets thrown in a regular landfill is one thing — the PFAS persists but is confined to the landfill. A PFAS-coated plate that goes to commercial composting is different: the PFAS gets concentrated into compost that’s used in food production. California composting facilities had been finding elevated PFAS levels in finished compost, traceable largely to foodservice plant-fiber inputs.
What AB 1200 specifically requires
AB 1200, the California law, has these key provisions:
Effective date: January 1, 2023. All plant-fiber food packaging sold in California cannot contain intentionally-added PFAS after this date.
Materials covered: Plant-fiber food packaging — bagasse plates, paper bowls, molded fiber clamshells, paper bowls, and similar products made from plant-based fibers.
Materials not covered: Plastic foodware, polymer-based foodware, conventional non-compostable disposables. (These are covered by other regulations but not specifically AB 1200.)
Definition of “intentionally added”: PFAS that are deliberately included as part of the product or its manufacturing process. Trace contamination from background environmental sources is not covered.
Enforcement: California Department of Toxic Substances Control conducts compliance testing. Penalties for violation can include product seizure, fines, and removal from market.
Documentation: Manufacturers must certify PFAS-free status. Many products now carry a PFAS-free claim with manufacturer attestation.
The industry response
The compostable foodware industry had several years’ notice before AB 1200 took effect. The response involved three approaches:
Reformulation with PFAS-free grease barriers. Several manufacturers developed alternative coatings: PLA-based films, beeswax coatings, plant-derived polymers. These provide grease resistance without PFAS but typically with somewhat reduced performance.
Reformulation with thicker fiber walls. Some manufacturers moved to thicker, more compressed fiber that’s inherently more grease-resistant without needing chemical coating. Bagasse bowls and plates have moved this direction.
Reformulation with paper laminate construction. Some manufacturers use multi-layer paper construction with a fiber core surrounded by water-resistant paper layers. The fiber provides bulk; the surface layers provide grease barrier.
Withdrawal from California market. A few smaller manufacturers withdrew their products from California rather than reformulate. This was particularly common for smaller specialty brands without the capital to invest in reformulation.
The reformulated products generally have slightly different performance characteristics than PFAS-coated predecessors:
- Slightly less grease-resistant (especially for very oily food held for extended periods)
- Slightly different texture (sometimes more “natural” feeling, less plastic-like)
- Comparable composting performance (the grease barriers are themselves compostable or biodegradable)
- Similar cost to conventional PFAS-coated alternatives, sometimes slightly higher
What went wrong with some early “PFAS-free” claims
In the years after AB 1200 took effect, several “PFAS-free” products were tested by third-party labs and found to contain measurable PFAS — sometimes intentionally added, sometimes as cross-contamination from shared manufacturing equipment.
The issues:
Cross-contamination in manufacturing. Manufacturers that had previously made PFAS-coated products and switched to PFAS-free were sometimes contaminated by residual PFAS in their factory equipment. Newer products carried trace PFAS even though no PFAS had been added.
Shorter-chain PFAS substitutes. Some manufacturers substituted shorter-chain PFAS compounds (PFHxA, PFBA) for the longer-chain ones explicitly banned. The shorter chains have similar barrier properties but the regulatory situation was ambiguous about whether they were covered.
Foreign supply chain issues. Imported products from countries without PFAS regulation sometimes contained PFAS despite supplier attestation.
Testing methodology gaps. “Total PFAS” testing requires sophisticated lab equipment that wasn’t widely available. Many “PFAS-free” claims relied on testing for specific compounds rather than total fluorine, which would have caught any PFAS variant.
California regulators have responded with stricter testing protocols, supplier verification requirements, and increasing transparency around manufacturer testing.
What this means for buyers
If you’re buying compostable food containers, compostable bowls, and other plant-fiber foodware in California (or in any state with similar regulation):
Look for explicit PFAS-free certifications. BPI-certified products since 2023 in California must be PFAS-free. The certification provides additional verification beyond manufacturer attestation.
Request total fluorine testing reports. For high-volume purchases or institutional procurement, ask suppliers for total fluorine testing reports rather than just PFAS-class testing. Total fluorine includes both PFAS and the shorter-chain variants.
Verify supply chain. For imported products, ask for testing reports from the manufacturing facility rather than just the importer. Manufacturer-level testing is more reliable than importer-level.
Expect somewhat different performance. PFAS-free foodware is functionally similar but not identical to PFAS-coated. Test in your specific use case before placing large orders.
What other states have done
Following California’s lead, several states have passed similar PFAS bans:
- New York: Banned intentional PFAS in food packaging effective 2023.
- Connecticut: Banned PFAS in food packaging effective 2024.
- Vermont: Banned PFAS in food packaging effective 2024.
- Washington: Banning PFAS in food packaging through phased approach, fully effective 2024-2026.
- Minnesota: Banned PFAS in food packaging through 2026.
By 2026, much of the US East and West Coast markets have PFAS bans in food packaging. The trend is clearly toward broader regulation rather than narrower.
Federal regulation is also moving. The US EPA has proposed rules to designate certain PFAS compounds as hazardous substances under federal law. Federal action would supersede or supplement state-level regulation.
The bigger picture
California’s PFAS ban in foodware is part of a broader regulatory shift around PFAS use across many product categories. Outdoor clothing manufacturers are removing PFAS treatments. Carpet manufacturers are phasing them out. Firefighting foam manufacturers are reformulating.
The compostable foodware industry was an early target for regulation because of the specific compost contamination issue. Foodware PFAS that enters commercial composting ends up in agricultural soil more directly than PFAS from other product categories. This made foodware a regulatory priority even though foodware contributes a relatively small fraction of overall PFAS in the environment.
The 2023 ban changed the compostable foodware market. Products that succeeded in the post-2023 California market are PFAS-free; the industry has moved to alternative grease barriers with comparable (slightly different) performance. The cost increase has been modest. The composting end-of-life is improved because the resulting compost has lower PFAS contamination.
For buyers, the practical takeaway is that the compostable foodware available today in California (and increasingly in other states) is PFAS-free in a way that products from before 2023 weren’t. The regulation has driven real industry change, even if the change has been bumpy in execution.
The next regulatory frontier is probably PFAS in other product categories — outdoor textiles, cosmetics, electronics manufacturing. California has historically led on these issues; expect more state-level legislation in coming years.
For B2B sourcing, see our compostable supplies catalog or compostable bags catalog.
For procurement teams verifying compostable claims, the controlling references are BPI certification (North America), EN 13432 (EU), and the FTC Green Guides on environmental marketing claims — these are the only sources U.S. enforcement actions cite.