From non-stick frying pans to waterproof jackets, stain-resistant carpets and firefighting foams, products containing per- and polyfluoroalkyl substances (PFAS) have become part of everyday life. Their performance is impressive: they repel water, oil and grease, tolerate high temperatures and resist chemical degradation. The problem is that the same stability that makes PFAS useful also allows them to persist in the environment and, in some cases, remain in the human body for years.
PFAS are not a single chemical. They are a large family of thousands of manufactured substances with different properties and toxicological profiles. Some are now restricted or being phased out, while others are still used and less thoroughly studied. This makes the subject difficult to navigate—particularly when product labels rarely state clearly whether PFAS are present.
Understanding where PFAS are found, what the evidence tells us about potential risks and which alternatives are available can help consumers, businesses and policymakers make more informed decisions.
What are PFAS?
PFAS are synthetic chemicals defined by the presence of carbon-fluorine bonds. These bonds are among the strongest in organic chemistry, which helps explain why many PFAS do not break down easily through natural processes. They can remain in soil, sediment, rivers and groundwater for decades or longer.
The group includes well-known compounds such as perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), as well as newer substances and shorter-chain alternatives. PFOA and PFOS have been associated with significant environmental and health concerns and are now heavily restricted in many countries. However, replacing one PFAS with another does not automatically remove the risk.
PFAS may enter the environment during manufacturing, product use, waste disposal, landfill leaching, industrial accidents and firefighting activities. Once released, they can travel through water systems, accumulate in contaminated areas and move through food webs.
Why are PFAS used in consumer products?
Manufacturers value PFAS because they can deliver several useful properties at the same time. Depending on the specific compound, PFAS may provide:
- Water and moisture resistance
- Oil, grease and stain resistance
- Non-stick performance
- Resistance to heat, chemicals and friction
- Reduced surface tension in industrial processes
- Durability in demanding environments
These characteristics have supported applications ranging from food packaging to aerospace components. In some specialised settings, PFAS-based materials have been difficult to replace without affecting product performance or safety. That is one reason why regulators and scientists distinguish between essential and non-essential uses rather than treating every application identically.
Common products that may contain PFAS
PFAS have been used in a wide variety of products. The exact chemicals and concentrations can differ by country, manufacturer and product generation. Older items may also contain compounds that are now restricted.
Non-stick cookware
Many traditional non-stick pans use fluoropolymer coatings, including polytetrafluoroethylene (PTFE). PTFE is a polymer and is not the same as PFOA, which was historically used as a processing aid in some manufacturing processes. PFOA has been phased out in many markets, but consumers may still encounter older cookware or products made in regions with different controls.
When used correctly, modern non-stick cookware is generally considered suitable for its intended purpose. However, overheating an empty pan can cause the coating to degrade and release irritating fumes. Scratched or badly deteriorated cookware should be replaced, particularly if the surface is visibly flaking.
Food packaging
Grease-resistant paper and card have historically been treated with PFAS. Examples include takeaway wrappers, fast-food packaging, microwave popcorn bags, bakery papers and pizza boxes. The chemicals can migrate from packaging into food, especially when the food is hot and oily.
Regulation is changing rapidly. Some jurisdictions have restricted PFAS in food contact materials, while others are introducing broader requirements. Still, “PFAS-free” claims should be interpreted carefully: they may refer only to specific substances, a regulatory threshold or a company’s own definition.
Outdoor clothing and footwear
Waterproof and breathable jackets, hiking trousers, tents, boots and technical gloves may use fluorinated treatments to repel rain and oils. These products can be particularly persistent because they are washed, worn outdoors and eventually discarded.
Many brands are now developing fluorine-free durable water repellents based on silicone, hydrocarbons, waxes or other materials. Performance varies, but for everyday rainwear, a PFAS-free product may provide more than enough protection.
Carpets, furniture and textiles
Stain-resistant carpets, upholstery and treated fabrics may contain PFAS or other chemical finishes designed to prevent liquids from soaking into fibres. These treatments can slowly wear away through abrasion, cleaning and normal use, creating contaminated dust or wastewater.
Choosing untreated textiles, using washable covers and addressing spills promptly can reduce the perceived need for permanent stain resistance. A small household accident is often easier to manage than a chemical treatment that remains in the environment long after the furniture has been discarded.
Cosmetics and personal care products
Some cosmetics have used fluorinated ingredients to improve spreadability, texture, water resistance or durability. They may appear in products such as foundation, lipstick, eye makeup, moisturisers and dental floss.
Ingredient names can be difficult to recognise. Terms containing “fluoro”, “perfluoro” or “polyfluoro” may indicate a fluorinated compound, although not every PFAS can be identified by a simple keyword search. Consumers concerned about exposure can look for products with transparent ingredient lists and credible third-party certification.
Firefighting foams
Aqueous film-forming foams, commonly known as AFFF, have been widely used to extinguish certain flammable-liquid fires at airports, military bases, refineries and industrial sites. Their effectiveness has saved lives and protected infrastructure, but releases have caused serious contamination of soil and groundwater.
Firefighting organisations are increasingly moving towards fluorine-free foams where operationally appropriate. However, replacing AFFF requires careful testing, training and site-specific risk assessment. Fire safety cannot be compromised, so transition plans must be practical as well as environmentally responsible.
How can PFAS affect human health?
Human exposure occurs through several routes. Drinking contaminated water is often the most important source for communities near industrial sites, airports, military facilities, landfills or areas affected by firefighting foam. PFAS can also enter the body through food, indoor dust, consumer products and occupational exposure.
Research has linked exposure to certain PFAS—particularly PFOA and PFOS—with outcomes including changes in cholesterol levels, reduced antibody response to some vaccines, effects on liver function and developmental impacts. Some studies have also reported associations with pregnancy-related effects, immune system changes and certain cancers.
These findings must be interpreted carefully. PFAS differ substantially, and an association in an epidemiological study does not always prove that a particular exposure caused a health outcome. Risk depends on the specific chemical, dose, duration, route of exposure and individual factors. Nevertheless, the persistence and widespread distribution of PFAS support efforts to reduce unnecessary exposure.
One important point is that exposure is not limited to people who knowingly use PFAS products. Contaminated drinking water can affect entire communities, while workers in manufacturing, firefighting, waste management and certain industrial sectors may face higher levels of exposure.
PFAS and drinking water contamination
PFAS contamination is particularly difficult to manage because many compounds dissolve in water and can travel considerable distances. Standard drinking water treatment methods, such as conventional filtration and chlorination, are not designed to remove all PFAS.
The most established treatment options include granular activated carbon, ion exchange resins and high-pressure membrane systems such as reverse osmosis. Each technology has advantages and limitations:
- Granular activated carbon: effective for many long-chain PFAS, but filters require careful design, monitoring and replacement.
- Ion exchange: can remove a broad range of PFAS and may require less space, although spent resin must be managed safely.
- Reverse osmosis: highly effective for many PFAS, but it uses energy and produces a concentrated waste stream that still needs disposal.
Point-of-use filters can reduce PFAS in household drinking water, but performance depends on the technology and maintenance. Look for independent certification, follow replacement instructions and avoid assuming that a basic jug filter removes every contaminant. Testing is the only reliable way to understand local water quality.
Safer alternatives to PFAS products
The most effective alternative is often not another chemical. It is redesigning the product or changing the process so that water, grease or stains do not need to be repelled in the first place.
For consumers, practical options include:
- Choosing stainless steel, cast iron, glass or ceramic cookware instead of relying exclusively on non-stick coatings.
- Selecting food packaging made from paper, card or other materials explicitly certified as PFAS-free.
- Buying outdoor clothing labelled as fluorine-free or made with non-fluorinated water-repellent treatments.
- Choosing untreated carpets and furniture, or products that use removable and washable covers.
- Checking cosmetic ingredients and selecting brands that publish clear PFAS policies.
- Replacing heavily worn or damaged non-stick cookware and following the manufacturer’s temperature guidance.
Businesses can go further by mapping where PFAS are used in their supply chains, asking suppliers for full material disclosure and setting measurable phase-out targets. Substitution should include testing for regrettable replacements: a short-chain or less-studied PFAS may still persist and spread through water.
In industrial applications, alternatives may include silicone-based coatings, mineral treatments, stainless steel, ceramic surfaces, non-fluorinated polymers and mechanical design changes. The safest option depends on the required temperature, chemical resistance, durability and fire performance.
How to recognise meaningful “PFAS-free” claims
Marketing language can make chemical avoidance unnecessarily confusing. “PFOA-free” does not necessarily mean PFAS-free; it only indicates that one specific substance is absent or below a stated threshold. Similarly, “no intentionally added PFAS” may not address trace contamination introduced during manufacturing.
When evaluating a product, look for:
- A clear definition of the claim
- Information covering the entire PFAS group rather than one or two chemicals
- Independent certification or laboratory testing
- Supply-chain transparency
- Specific details about coatings, treatments and processing aids
Consumers should not be expected to become chemical analysts before buying a raincoat or a takeaway meal. Stronger regulation and standardised labelling are essential because individual purchasing decisions cannot solve a contamination problem created across complex global supply chains.
What regulators are doing
Authorities in the United Kingdom, the European Union, the United States and elsewhere are tightening controls on certain PFAS and considering restrictions on the entire chemical group. Drinking water limits, product bans, reporting obligations and manufacturer responsibilities are developing at different speeds.
The regulatory challenge is substantial. PFAS are used in thousands of applications, data gaps remain for many substances and contaminated sites can require years of remediation. Policymakers must balance public health, environmental protection, industrial needs and the availability of safer alternatives.
A group-wide approach is increasingly being discussed because regulating chemicals one at a time can encourage substitution with another persistent compound. At the same time, essential uses—such as certain medical, energy or safety applications—may require carefully controlled exemptions while alternatives are developed.
What can households do now?
There is no need to panic or discard every item in the home. A sensible approach is to reduce avoidable exposure, particularly from drinking water, food packaging and products that are frequently heated, worn or handled.
- Check local water-quality reports, especially if you live near an airport, industrial site, landfill or military facility.
- Use a certified PFAS-reduction filter if testing shows contamination and maintain it as instructed.
- Avoid overheating empty non-stick pans.
- Reduce reliance on grease-resistant takeaway packaging when practical.
- Choose products with credible fluorine-free or PFAS-free certification.
- Do not burn or casually dispose of treated materials; follow local waste guidance.
- If your work involves firefighting foam, industrial coatings or contaminated sites, use the required protective controls.
PFAS products were designed to be durable and convenient. That convenience has created a long environmental legacy, but it does not mean safer choices are impossible. Better product design, transparent information, effective regulation and targeted water treatment can reduce exposure while supporting the applications where these chemicals are genuinely difficult to replace.
The central question is no longer whether PFAS can perform a useful function. They clearly can. The more important question is whether that function is essential—and whether the same result can be achieved without leaving persistent chemicals behind in our water, soil and bodies.