Half of the cosmetics tested in a 2021 University of Notre Dame study contained PFAS, and most of those products did not list a single PFAS compound on the label. That gap, between what is in a product and what the package admits to, is the whole problem with forever chemicals. They are everywhere, they rarely announce themselves, and the things they make convenient, like water that beads off a jacket or grease that does not soak through a fry bag, are exactly the things you reach for without thinking.
PFAS stands for per- and polyfluoroalkyl substances, a family of thousands of synthetic chemicals built around carbon-fluorine bonds that almost nothing in nature can break. That stability is why manufacturers love them and why they earned the "forever chemical" nickname. They resist water, oil, heat, and stains. They also build up in your blood, your soil, and your tap water and stay there for years.
Most coverage treats PFAS like a water problem. Drinking water is one of the biggest exposure routes, and you can check your local water for PFAS in seconds by zip code. But your tap is only one door these chemicals walk through. The other doors are in your bathroom cabinet, your kitchen drawer, your closet, and your takeout bag. Here is where they hide, what independent testing actually found, and the swaps that move the needle.
The pan is where most people first heard the word Teflon. Teflon is a brand name for PTFE, polytetrafluoroethylene, which is itself a PFAS. For decades the manufacturing process also used PFOA, one of the most studied and most harmful forever chemicals.
Here is the part that trips people up. After the EPA's PFOA Stewardship Program, DuPont and seven other major manufacturers agreed to eliminate PFOA, and Teflon products have been PFOA-free since around 2013. So when you see "PFOA-free" stamped on a new nonstick pan, that claim is technically true and almost meaningless. It tells you one specific chemical is gone. It does not tell you the coating is PFAS-free, because the PTFE coating itself is a fluoropolymer, and many pans now use a short-chain replacement chemistry like GenX instead.
A nonstick pan in good shape, used at moderate heat, is a low-exposure item. The risk climbs when the coating is scratched, flaking, or overheated past about 500°F, which is easy to hit on an empty pan on high.
The swap: cast iron, carbon steel, or stainless steel for daily cooking. If you want genuinely nonstick, look for ceramic-coated pans that are explicitly PFAS-free, not just PFOA-free, and replace any nonstick pan once the surface starts to scratch.
This is the category with the best recent news. In 2022, Consumer Reports tested 118 food packaging products from major chains and found measurable organic fluorine, a marker for PFAS, in more than half of them. Paper bags for sides from Nathan's Famous topped the list at 876 and 618 parts per million. The chemicals turned up at chains that market themselves as healthier too, including a Cava pita-chip bag at 260 ppm.
Then the rules shifted. In February 2024, the FDA announced that grease-proofing substances containing PFAS were no longer being sold for food-contact use in the United States, the result of voluntary phase-out commitments from manufacturers. The agency called food packaging the primary source of dietary PFAS exposure from authorized food-contact uses, and that source is now largely closed for new products.
What that does not fix: packaging already in the supply chain, imported products, and the fact that "no intentionally added PFAS" is not the same as "tested clean." Molded-fiber bowls, microwave popcorn bags, and grease-resistant wrappers were the worst offenders historically.
The swap: decant takeout into your own dishes when you get home rather than eating out of the container, skip microwave popcorn bags in favor of loose kernels in a pot or a plain paper bag, and treat any greasy molded-fiber bowl as a single-use item, not a leftovers vessel. For the full brand-level breakdown, see our guide to PFAS in food packaging and the brands to avoid.
You would not guess that flossing could raise the PFAS in your blood, but a 2019 study from the Silent Spring Institute found exactly that. Researchers tested 18 floss products and used the results alongside blood samples from 178 women. Women who reported using Oral-B Glide had higher blood levels of PFHxS, a specific forever chemical, than women who used other floss. The slick PTFE coating that helps floss slide between teeth was the suspected route.
Oral-B has since said its Glide floss no longer uses PTFE and that none of its floss products are made with PFAS. The lesson is broader than one brand. Any floss marketed as gliding, slippery, or coated for easy use is a candidate for fluoropolymer coating.
The swap: uncoated nylon floss or silk floss coated with natural wax. Our roundup of PTFE-free dental floss names specific products that test clean and still slide well enough to use daily.
The Notre Dame study that opened this piece is the one to know. Researchers tested 231 cosmetic products and found indicators of PFAS in about half of them, including roughly 80% of waterproof mascaras and around 60% of foundations, liquid lipsticks, and eyeliners. The highest fluorine levels showed up in products labeled waterproof or long-lasting, which makes sense, because the same properties that keep mascara from running keep PFAS from washing off your face.
The labeling problem is severe here. The majority of products with high fluorine, including ones confirmed to contain PFAS, listed no PFAS on the ingredient panel at all. So you cannot reliably shop your way out of this by reading the back of the tube.
A 2026 FDA analysis adds nuance: across hundreds of thousands of registered products, intentionally added PFAS appeared in a smaller share than the spot-testing studies suggested, with PTFE the single most common one and eye products the most likely category. Both things can be true. Intentional use is concentrated, and incidental contamination is widespread.
The swap: avoid anything labeled waterproof, transfer-proof, or long-wear unless the brand publishes PFAS testing. Check ingredient lists for "fluoro" or "perfluoro" prefixes and PTFE, treat their absence as inconclusive rather than a guarantee, and lean toward brands with third-party PFAS-free certification. Mineral-based and clearly labeled clean-beauty lines are the safer default.
If a jacket sheds water and a stain wipes off a couch like magic, a durable water repellent finish is usually doing the work, and historically that finish was PFAS. Rain jackets, hiking gear, ski wear, water-resistant sneakers, and "stain-proof" upholstery all sit in this bucket.
The good news is that this is one of the faster-moving categories. Outdoor brands have been switching to PFAS-free DWR finishes, and several have committed to eliminating the chemistry from their lines entirely. The finishes are not yet as bombproof as the old fluorinated ones, so you may need to re-treat a PFAS-free jacket more often, which is a small price.
The swap: buy rain gear explicitly labeled PFAS-free or PFC-free, re-waterproof with a fluorine-free spray when the beading fades, and be skeptical of cheap "waterproof" fast fashion that does not disclose its finish. Our guide to PFAS-free rain gear lists brands that have made the switch and the certifications worth trusting.
Air fryers are the newest worry on this list, and the answer is more reassuring than the headlines. The baskets and trays in many air fryers are coated with PTFE nonstick, the same fluoropolymer family as a Teflon pan. As with cookware, an intact coating used at normal temperatures is a low-exposure situation. The risk is a scratched, peeling, or chipped basket.
The swap: choose an air fryer with a stainless-steel or PFAS-free ceramic basket, avoid metal utensils that scratch the coating, and retire any basket once it starts to flake. We broke down which air fryers have PFAS and which models use safer materials.
Stain-resistant carpet, treated upholstery, and "easy clean" rugs were a major PFAS application for decades. The chemicals migrate into household dust, which is a meaningful exposure route for crawling babies and pets who spend their day at floor level. This is also why a lot of the PFAS in your blood may have nothing to do with your water.
The swap: untreated wool or natural-fiber rugs, skipping the optional stain-guard add-on when you buy a couch, vacuuming with a HEPA filter to control dust, and wet-mopping hard floors. You will not eliminate legacy textiles overnight, but new purchases are where you have control.
PFAS also get into food directly, through contaminated water used in farming, through soil treated with sewage sludge, and through packaging. Fish from contaminated waterways and some produce grown on affected land can carry measurable levels. This route is harder to control as an individual, which is part of why testing your water and reducing packaging exposure are the levers most worth pulling.
You do not need to replace your entire house this weekend. Exposure is about dose and routine, so prioritize the things you contact daily or that reach your bloodstream most directly. In rough order: filter your drinking water, switch out scratched nonstick pans and air fryer baskets, drop waterproof cosmetics you use every day, and move to uncoated floss. Rain gear and carpet matter, but they are lower-frequency contact and easier to handle on a normal replacement cycle.
If you want to start with the exposure route that has the most data behind it, look up the PFAS levels in your drinking water and decide whether a certified filter belongs on your list. From there, work outward to the cabinet, the kitchen, and the closet using the category guides linked above.
Often you cannot tell from the label, which is the core problem. The Notre Dame cosmetics study found that most products with high fluorine did not list any PFAS in their ingredients. Useful signals include marketing words like waterproof, stain-proof, grease-resistant, nonstick, and long-wear, and ingredient terms with "fluoro" or "perfluoro" in them or PTFE. The most reliable evidence is third-party PFAS-free certification or published test results from the brand.
PFOA-free means one specific chemical, PFOA, is not used in manufacturing, and Teflon-style products have been PFOA-free since around 2013. It does not mean the pan is free of all PFAS, because the nonstick coating itself is usually PTFE, a fluoropolymer. An intact coating used at moderate heat is low-risk. If you want to avoid PFAS entirely, choose cast iron, stainless steel, or a pan certified PFAS-free rather than just PFOA-free.
It closes the biggest door but not all of them. In February 2024 the FDA confirmed that PFAS grease-proofing agents are no longer sold for food-contact use in the United States, which it called the primary source of dietary PFAS from authorized uses. Packaging already in the supply chain, imported products, and incidental contamination can still carry PFAS, so transferring takeout into your own dishes is still worth doing.
A 2019 Silent Spring Institute study found that women who used Oral-B Glide had higher blood levels of the PFAS compound PFHxS than women who did not, and the PTFE coating was the likely route. Oral-B has since said its Glide floss no longer uses PTFE. Switching to uncoated nylon or naturally waxed floss removes that route entirely.
Start with your drinking water, because it is a daily, direct exposure with the most regulatory and scientific attention. The EPA set enforceable drinking water limits of 4 parts per trillion for PFOA and PFOS, and as of 2026 those limits remain in place. After water, scratched nonstick cookware and everyday waterproof cosmetics are the next highest-value swaps.
Yes. Activated carbon and reverse osmosis filters certified for PFAS reduction can cut these chemicals substantially. The key is choosing a filter independently certified for PFAS removal rather than a generic "improves taste" model. Our PFAS filter guide walks through which technologies work and what certifications to look for.
They were marketed as safer because they leave the body faster than older long-chain compounds like PFOA. But research has linked GenX and similar replacements to their own health concerns, and they are still extremely persistent in the environment. "Newer" does not reliably mean "safe," which is why PFAS-free is a better target than swapping one fluorinated chemical for another.
Pick one room. The kitchen is the easiest place to see results: retire the scratched nonstick pan, check your air fryer basket, and stop eating out of greasy takeout containers. Then run your zip code through our water lookup to see whether PFAS is showing up in your tap, because that is the one exposure route you can measure today and act on with a single certified filter. From there, the category guides above turn the rest of the house into a checklist instead of a worry.