Maine Holds Public Hearing on CUU Determinations

Maine has been busy building what amounts to a “bouncer system” for PFAS in consumer products: if your product contains intentionally added PFAS, you may be headed for the “not tonight” lineunless you can prove your use is a Currently Unavoidable Use (CUU). And when Maine holds a public hearing on CUU determinations, that’s not just a procedural box-check. It’s the moment where science, supply chains, public health, and plain old common sense all get shoved into the same microphone.

This article explains what CUU determinations are, why Maine’s public hearing matters, what the first wave of CUU proposals looked like, and what companies (and consumers) should watch next. We’ll keep it serious where it needs to be… and human where it helps. Because nothing says “fun weekend read” like administrative rulemakingexcept maybe a root canal.

Quick refresher: PFAS, Maine, and the “no more non-essential” plan

PFAS (per- and polyfluoroalkyl substances) are often called “forever chemicals” because many PFAS are persistent in the environment. Maine’s PFAS-in-products framework is designed to reduce human exposure and environmental contamination by targeting non-essential uses through sales prohibitions, with a narrow pathway for essential uses to continue when alternatives are not reasonably available.

Over time, Maine’s program has been adjusted by legislation and rulemaking. The current approach focuses on specific product categories with prohibition dates, rather than a single, universal reporting scheme for every PFAS-containing product under the sun.

What is a CUU determination (and why the acronym sounds like a cartoon bird)?

A Currently Unavoidable Use (CUU) determination is Maine’s formal recognition that a specific use of intentionally added PFAS in a product is:

• Essential for health, safety, or the functioning of society, and
• Lacking reasonably available alternatives that work similarly.

Maine doesn’t treat “essential” as “nice-to-have.” The bar is closer to: “If this product disappears, do we see major negative health outcomes, lose the ability to mitigate significant risks, or disrupt daily societal functions people rely on?” That framing is deliberateCUU is meant to be the exception, not the escape hatch.

CUU is not a free passit’s a regulated lane with tolls

In Maine’s system, CUU determinations are made through routine technical rulemaking. That means the decision is not only technical; it is also public-facing. Once a use is designated as CUU, manufacturers continuing that use must meet Maine’s notification requirements before selling in Maine beyond the prohibition effective date. In other words: even when you “win,” you still have homework (and paperwork).

Why Maine’s public hearing matters (even if you hate meetings)

A public hearing is where the state’s draft direction meets the real world. In a CUU-focused hearing, you can expect testimony and comments from:

• Manufacturers and importers trying to avoid product disruptions while staying compliant
• Environmental advocates pressing for narrow exemptions and strong proof requirements
• Trade associations highlighting transition timelines, testing burdens, and supply-chain constraints
• Technical experts discussing performance needs, hazards, and alternative material feasibility

The hearing record helps shape how Maine applies the CUU standardwhat counts as “reasonably available,” what evidence is persuasive, and whether the state’s approach is workable without turning compliance into an endurance sport.

The context: what’s coming on January 1, 2026

The reason CUU determinations are suddenly everyone’s favorite topic is the next wave of sales prohibitions. Maine’s program sets product-category bans starting January 1, 2026 for a list that includes (among others):

• Cleaning products
• Cookware products
• Cosmetic products
• Dental floss
• Juvenile products
• Menstruation products
• Textile articles (with an exception)
• Ski wax
• Upholstered furniture
• Plus certain products sold in fluorinated containers or containers that otherwise contain intentionally added PFAS

If your product fits in one of those categories and contains intentionally added PFAS, the default assumption is: you need an alternative. CUU is for when you can prove a safe, functional alternative isn’t reasonably available yetand the function is essential.

How Maine structured the CUU timeline (and why June 1 became a very popular date)

In theory, CUU proposals for an initial determination are submitted within a window tied to the applicable prohibition date. For products facing the January 2026 prohibitions, Maine established a specific submission deadline of June 1, 2025. That special deadline exists because rulemaking timelines and the short runway to 2026 made the standard schedule hard to apply cleanly.

Practically, this means many companies had to decide quickly whether to (a) reformulate/redesign, (b) exit the Maine market, or (c) prepare a CUU proposal with enough evidence to survive public scrutiny. And yespublic scrutiny matters: stakeholders have been cautioned that CUU determinations involve public comment and that proposals need sufficient non-confidential detail to justify approval.

The first wave: 11 CUU proposals and a very selective “yes”

Maine’s Department of Environmental Protection received 11 CUU proposals for products tied to the 2026 prohibitions. The proposals spanned:

• Cookware (5 proposals)
• Cleaning products (4 proposals)
• Cosmetic product container (1 proposal)
• Upholstered furniture (1 proposal)

Maine’s evaluation approach emphasized two big questions: (1) Is PFAS necessary for the product to perform safely as intended? and (2) Are reasonably available alternatives obtainable that function similarly? The result: Maine recommended approval for two proposed CUU determinations and recommended denial for the rest.

The CUUs Maine proposed to approve (and why they stood out)

Maine’s initial recommended approvals were highly specific and focused on components of cleaning product containers rather than PFAS in the cleaning products themselves. That distinction matters: a “container component that prevents failure” can look more safety-critical than, say, “makes the pan extra non-stick.”

1) Internal cartridge valve in a liquid cleaner container

One recommended CUU involved PFAS used in a cleaning product container’s internal cartridge valvedescribed as needing to withstand chemical compatibility challenges and off-gassing from corrosive formulations, while controlling dilution ratios so the product works effectively and reduces consumer exposure to concentrated chemicals.

The state’s reasoning, in plain English: if the valve fails, you could end up with leaks, mis-dilution, unsafe handling, or worse. Maine recommended approval because the component performs a “vital role” and failure could create consumer safety concerns.

2) Container vented cap liners

The second recommended CUU involved PFAS in vented cap liners (foam and induction foils) used in containers across multiple product types. The core safety claim: the vents allow off-gassing and help prevent containment failuremeaning the container doesn’t become a pressurized chemistry surprise.

Maine recommended approval because the component was presented as essential to safe function across product categories subject to the 2026 prohibitions, and the proposal argued that tested alternatives did not meet the relevant performance standard.

For readers who love details (and for compliance teams who live on details), external summaries of Maine’s initial approvals have referenced highly specific trade and industry classifications (HTS and NAICS) tied to these container components. The takeaway isn’t the code numbersit’s the message: Maine is willing to get granular and approve narrowly defined uses rather than broad product-wide exemptions.

The proposals Maine recommended denying (and what that signals)

Many rejected proposals argued PFAS were important for performancedurability, heat resistance, non-stick properties, friction reduction, chemical stability, and so on. Maine’s response, repeatedly, boiled down to: performance benefit is not the same as societal essentiality, especially when alternatives are commonly known and available.

Cookware: non-stick coatings and components

Several proposals sought CUU determinations for PTFE (a PFAS) in cookware and bakeware coatings that contact food, plus additional cookware-adjacent items like small kitchen appliances and coffee maker components. These proposals described benefits like predictable cooking results, easier cleanup, and durability.

Maine’s recommendation was denialciting insufficient evidence that the use meets the statutory “essential” definition and emphasizing that alternatives were commonly known and obtainable.

Cleaning products: internal components for air-care devices

Two proposals addressed PFAS used in internal components of electric air freshener/fragrance warmer devices, framing PFAS as critical for flame-retardant barriers and safety performance. Maine recommended denial based on lack of evidence that removal would trigger the statute’s defined negative outcomes, and based on the presence of obtainable alternatives.

Cosmetic container O-ring and upholstered furniture component

A proposal for a PFAS-containing O-ring in a hand lotion container emphasized chemical compatibility and seal performance. Another proposal addressed PFAS in a massage chair’s internal mechanical components (e.g., ball bearings), tied to noise reduction and longevity.

Maine recommended denial for these as well, again pointing to insufficient evidence under the statutory criteria and the availability (or obtainability) of alternatives.

The public hearing: the stakes and the real questions being tested

When Maine held a public hearing on CUU determinations (as part of proposed amendments to its PFAS products rule), the discussion wasn’t just “Should these two be approved?” It also tested broader themes that will shape future CUU outcomes:

1) How narrow is “narrow”?

Maine’s first approvals were extremely specific. Public comments often pressure agencies in two opposite directions: broaden exemptions to avoid market shocks, or narrow them further to avoid loopholes. The outcome tells other industries what kind of “narrow” they should plan for.

2) What evidence actually persuades Maine?

Expect Maine to weigh real-world data: alternative testing results, safety incident risk, failure-mode analysis, supply availability, and whether the function is truly necessary for safe performance (not just premium performance).

3) How fast can alternatives realistically be deployed?

Industry comments in Maine’s rulemaking record have argued that replacing PFAS in critical applications can take many yearssometimes a decade or morebecause alternatives must be identified, tested, qualified, and scaled. Those concerns matter at hearings because CUU determinations are time-limited, typically on a five-year cycle, and renewal processes can be burdensome.

What happened next: adoption and effective dates

Maine’s Board of Environmental Protection held a public hearing on the proposed amendments to Chapter 90 related to CUU determinations on August 21, 2025. The Board then adopted the amended rule on October 2, 2025, and it went into effect on October 7, 2025. This timing matters because it set the operational rules and determinations ahead of the January 1, 2026 prohibition wave.

What businesses should do now (practical steps that aren’t “panic”)

Step 1: Map where PFAS shows upincluding in components

Maine’s early approvals centered on internal container components. That’s your hint to look beyond “the product” and into parts, packaging, gaskets, coatings, liners, valves, tubing, and other hidden components.

Step 2: Confirm your product category and prohibition date

The 2026 list is broad. If you sell nationally distributed goods, Maine’s deadlines can become your de facto national redesign scheduleespecially when retailers don’t want different SKUs for one state.

Step 3: If considering CUU, build the file like you’re going to court (because you kind of are)

A persuasive CUU proposal typically needs:

• A clear description of the PFAS function and why it’s necessary for safe performance
• Evidence that alternatives have been assessed and why they fail (performance, safety, feasibility, availability)
• Documentation that the use is essential under the statutory definition (not merely preferred)
• A realistic timeline and plan for transitioning away from PFAS if alternatives emerge

Step 4: Plan for notifications and fees

If your use is covered by an approved CUU, you may still have to submit notifications to continue sales beyond the prohibition date, and Maine has associated fees (often discussed publicly as $1,500 per notification in summaries of the program). Treat CUU as “permission with conditions,” not “permission to forget about it.”

Why Maine’s CUU hearing matters beyond Maine

Maine’s approach is being watched because other states are building PFAS-in-products restrictions with CUU-style exemptions. When Maine applies a strict, highly specific standard, it sends a signal: “Bring evidence, not vibes.” It also encourages manufacturers to invest in alternatives early, rather than betting on broad exemptions later.

Just as importantly, Maine’s hearing-and-rulemaking model shows how CUU determinations can become a transparent public process. That transparency can increase trustbut it also raises the stakes for applicants, who must justify their use in a way that makes sense to regulators, experts, and the public at the same time.

Conclusion: CUU is Maine’s narrow bridge, and the hearing is the weight test

Maine’s public hearing on CUU determinations is where the state tests whether the “currently unavoidable” claim holds up when exposed to daylight. The first wave suggests Maine is willing to approve CUUsbut only when the use is tightly defined, safety-connected, and backed by evidence showing that alternatives aren’t reasonably available.

If you’re a manufacturer, the lesson is simple: don’t assume you’ll be exempt. If you’re a consumer, expect more PFAS-free productsespecially in categories headed toward 2026. And if you’re the person who has to read the rulemaking record? I’m sorry. I hope you have snacks.

Stakeholder Experiences : What it’s like living through a CUU hearing cycle

The interesting thing about a public hearing on CUU determinations is that it’s simultaneously high-stakes and deeply mundane. On one side, you have discussions about chemical resistance, off-gassing, and failure modes that could affect safety. On the other side, you have people asking where to upload a PDF and whether their microphone is muted. Both are equally powerful forces in the universe.

Experience #1: The compliance manager’s “spreadsheet season.”
In many companies, the CUU timeline turns into a calendar you can’t unsee. First comes the product mapping: identifying where PFAS might appearnot just as an ingredient, but in coatings, liners, gaskets, tubing, and packaging components. That’s when the compliance manager learns the difference between “our product is PFAS-free” and “our product is PFAS-free except for the part nobody ever talks about.” CUU discussions force internal conversations across departments that don’t normally share oxygen: regulatory, R&D, procurement, packaging engineers, and legal. The hearing date becomes a milestone on the Gantt chart. The comment deadline becomes a motivational poster: “Submit by Tuesday or become a case study.”

Experience #2: The engineer’s dilemmaalternatives that ‘work’ but don’t really work.
Engineers often describe the alternative search as a grind. In some cases, a PFAS-free material technically exists, but it fails in one annoying way: it cracks after repeated exposure, swells, loses seal integrity, or doesn’t handle temperature swings. Those issues can look trivial until you picture a container component failing in the field. CUU conversations turn a performance debate into an evidence debate. It’s not enough to say “the alternative is worse.” You need data, tests, failure analysis, and supply availability. Engineers end up translating lab results into plain English for a public audiencebecause a hearing is not a peer-reviewed journal. It’s a room where people want to know: “Will this leak? Will it burn? Will it break?”

Experience #3: The public-interest advocate’s balancing act.
Advocates who participate in hearings often walk a tightrope. They want strong PFAS reductions, but they also don’t want unintended safety risks or sudden loss of truly essential products. The hearing becomes a place to push for a narrow CUU interpretation: “Prove it’s essential. Prove alternatives aren’t available. Prove you’re working toward replacement.” Advocates may focus on guardrailsshorter exemption durations, clearer renewal standards, and transparency requirements. They also flag the concern that “essential” can become a stretchy word if the state isn’t careful. The experience is less about yelling and more about building a record the agency can use to defend strict decisions later.

Experience #4: The regulator’s realitymaking a decision that has to survive daylight.
For regulators, a CUU hearing is partly technical evaluation and partly future-proofing. They know their decision needs to be consistent with statutory criteria, explainable to the public, and practical for implementation. When a proposal is narrow and tied directly to safety (like certain container components), the rationale can be clearer. When a proposal is broad or centered on “better performance,” it’s harder to justify under an “essential for health, safety, or functioning of society” standard. Regulators also live in the world of timelines: aligning rulemaking schedules with prohibition dates, comment periods, and effective dates. The experience is a constant question: “Can we be strict, transparent, and realisticat the same time?”

If all of this sounds like a lot of work, that’s because it is. But Maine’s CUU hearing process is also a rare moment where supply chains and public policy meet in publicwhere a tiny valve or liner can become the main character in a statewide conversation about safety, feasibility, and the pace of chemical substitution.