PFAS are a group of over 14,000 synthetic chemicals that don’t break down in the environment or in your body. Scientists call them “forever chemicals” because that’s effectively what they are. Once they exist, they persist for thousands of years.

The CDC has detected PFAS in the blood of 97% of Americans, including newborn babies. According to the EWG’s contamination map, over 110 million Americans may be drinking tap water contaminated with PFAS.

Stanford neuroscientist Andrew Huberman dedicated a full episode of his podcast to the health effects of PFAS and microplastics, calling water filtration one of the most impactful steps for reducing exposure. The topic has also been covered in depth by Dr. Peter Attia, Dr. Rhonda Patrick, and other leading health researchers.

This guide explains what PFAS are, where you’re being exposed, what the health risks look like, and what you can actually do about it.

The Short Version

PFAS (per- and polyfluoroalkyl substances) are man-made chemicals built on carbon-fluorine bonds, which are among the strongest bonds in chemistry. That strength is what makes them useful in products (nonstick coatings, waterproof fabrics, grease-resistant food packaging) and also what makes them nearly impossible to destroy.

They were first developed around World War II, and we’ve been manufacturing and releasing them into the environment ever since. The EPA’s toxicity database now lists 14,735 unique PFAS compounds.

The problem: they accumulate. In your blood, in your organs, in groundwater, in soil, in fish, in rain. A 2022 study in Environmental Science & Technology found PFAS in rainwater worldwide at levels exceeding EPA safety guidelines. There is effectively no place on Earth that is PFAS-free.

Where Are PFAS Found?

PFAS show up in more products than most people realize. Here’s where you’re most likely encountering them.

Drinking Water

About 50% of U.S. rivers and streams contain measurable PFAS. If you’re concerned about microplastics in drinking water, PFAS contamination is an equally serious and often overlapping problem. The EWG has mapped 9,728 contamination sites across all 50 states, and that number keeps growing. Both public water systems and private wells are affected. If you want to filter all the water in your house, a whole house water filter can address PFAS at the point of entry.

The major contamination sources are military bases and airports (from firefighting foam), industrial facilities (textile and chemical manufacturing), landfills (where PFAS-containing products leach into groundwater), and wastewater treatment plants (which can’t remove PFAS with standard treatment).

Cookware

Nonstick cookware is the product most people associate with PFAS, and for good reason. Traditional Teflon coatings are made with PTFE, which is itself a PFAS compound. When these coatings overheat or get scratched, they can release PFAS particles and fumes directly into your food. This applies to non-toxic air fryers too, since most air fryer baskets use the same PTFE-based coatings.

The good news is that PFAS-free cookware options have improved dramatically. Cast iron, stainless steel, carbon steel, and certified ceramic coatings all avoid PFAS entirely. See our guide to the best non-toxic cookware for specific recommendations.

Food Packaging

Fast food wrappers, microwave popcorn bags, pizza boxes, take-out containers, and candy wrappers have historically used PFAS-based grease-proofing agents. The FDA announced in February 2024 that these agents are no longer being sold for use in food-contact materials in the U.S., but existing inventory may still be in circulation, and imported products may not follow the same rules.

Clothing and Textiles

Waterproof jackets, stain-resistant pants, hiking boots, and backpacks often use PFAS-based treatments for water and stain resistance. The outdoor clothing industry has been slow to change, though brands like Patagonia and The North Face have committed to phasing out PFAS.

Cosmetics and Personal Care

Waterproof eyeliner, mascara, lipstick, foundation, and even some dental floss contain PFAS. Even everyday products like shampoo and sunscreen can contain PFAS-related compounds. A 2021 Notre Dame study found PFAS indicators in over half of the cosmetics tested.

Other Sources

Stain-resistant carpet treatments, fire-suppressing foam (used by firefighters and at airports), laundry detergent, and even toilet paper have been found to contain PFAS.

Health Effects: What PFAS Do to Your Body

The research on PFAS health effects has accelerated in the past few years, and the findings are consistently bad. Here’s what the science shows.

Cancer

Multiple studies have linked PFAS exposure to increased risk of kidney, testicular, and prostate cancers. A study published in the Journal of Exposure Science & Environmental Epidemiology found that PFAS in drinking water was associated with increased cancer incidence in digestive, endocrine, oral, and respiratory systems.

Thyroid Disease

PFAS are endocrine disruptors, meaning they interfere with hormones. They specifically target the thyroid, adrenal, and reproductive systems. A case-control study in Chemosphere examined the connection between PFAS exposure and thyroid cancer risk.

Immune System Suppression

PFAS weaken your body’s ability to fight infections and reduce vaccine effectiveness. This has been documented in both adults and children. If your immune system isn’t responding to vaccines as well as it should, your PFAS exposure could be a contributing factor.

Reproductive Problems

A 2025 Chinese CDC study found that women with two or more unexplained miscarriages had significantly higher PFAS blood levels than women without pregnancy complications. PFAS exposure has also been linked to decreased fertility in both men and women, and increased blood pressure during pregnancy. Dr. Shanna Swan, a reproductive epidemiologist at Mount Sinai and author of Count Down, has documented that sperm counts have been declining by roughly 1% per year, with phthalates and other endocrine-disrupting chemicals (including PFAS) playing a significant role.

Accelerated Aging

Emerging research suggests PFAS may accelerate biological aging. A 2024 study published in Environmental Health Perspectives found associations between PFAS blood levels and markers of epigenetic aging, particularly in middle-aged men. In plain terms, PFAS may be making your cells age faster than they should.

Liver Damage

PFAS accumulate in the liver and have been associated with elevated cholesterol, fatty liver disease, and reduced liver function.

How Long Do PFAS Stay in Your Body?

PFAS do eventually leave your body, primarily through urination, but the process is painfully slow.

The half-life of the most common PFAS compounds (PFOA, PFOS, PFHxS) in the human body ranges from 2.7 to 8 years. For comparison, lead has a half-life of about 2 months in blood.

So if you stopped all PFAS exposure today, it would take roughly 5 to 16 years for your body to eliminate half of the PFAS currently in your blood. But because we’re all continuously exposed through water, food, and consumer products, our body levels stay elevated even as individual molecules are slowly excreted.

This is why reducing ongoing exposure matters so much. You can’t eliminate what’s already in your body quickly, but you can stop adding more. For a room-by-room action plan, see our guide on how to detox your home.

The EPA’s Drinking Water Rule (and What Happened to It)

In April 2024, the EPA finalized the first-ever national limits for PFAS in drinking water:

ChemicalMaximum Level
PFOA4 parts per trillion
PFOS4 parts per trillion
PFHxS10 parts per trillion
PFNA10 parts per trillion
HFPO-DA (GenX)10 parts per trillion

These limits were extremely strict. For context, 4 parts per trillion is equivalent to about 4 drops of water in 20 Olympic swimming pools. The EPA estimated this rule would protect approximately 100 million people and prevent thousands of deaths.

What happened next: The EPA rule faces an uncertain future under the current administration. Public water systems originally had until 2029 to comply, and the timeline may shift further. Check the EPA’s PFAS page for the most current enforcement status.

Meanwhile, at least 10 states (including Maine, Minnesota, and California) have enacted their own laws restricting PFAS in consumer products like cookware, cleaning supplies, and food packaging. A high-profile recent example: Bryan Johnson’s artificial turf admission revealed that crumb rubber infill leaches PFAS into residential yards. State-level action is filling some of the gaps left by federal rollbacks.

PFAS Lawsuits: The $14 Billion Reckoning

The legal consequences of PFAS contamination are massive and still growing.

Thousands of lawsuits are pending in the AFFF multidistrict litigation in South Carolina federal court, with new cases added regularly. These involve communities, water utilities, and individuals harmed by PFAS contamination from firefighting foam.

DuPont and related companies have faced billions in PFAS contamination settlements across multiple states. These are among the largest environmental settlements in U.S. history.

3M agreed to a $10.3 billion settlement in 2023 to resolve claims from public water systems affected by PFAS contamination. If your local water system has been affected, your utility may be eligible. Check with your local water authority for the latest on claims and deadlines.

How to Reduce Your PFAS Exposure

You can’t eliminate PFAS exposure completely. It’s in the rain, the soil, and the food supply. But you can significantly reduce the biggest sources of ongoing exposure.

Filter Your Water

According to NonToxicLab’s research, this is the single most impactful step you can take. The EPA and EWG both recommend water filtration for PFAS removal.

Reverse osmosis (RO) systems are the most effective, removing close to 99% of PFAS compounds. Dr. Rhonda Patrick has highlighted that RO filters can remove 99.9% of microplastics, BPA, phthalates, and PFAS from drinking water. Look for systems certified to NSF/ANSI 58. Our guide to the best reverse osmosis systems covers the top options.

Activated carbon filters are also effective and more affordable. Look for NSF/ANSI 53 certification, which specifically tests for PFAS reduction. Multi-stage carbon filters perform better than single-stage. If you also want to remove fluoride from your water, check out our guide to the best fluoride water filters.

Important: Based on NonToxicLab’s research, standard Brita pitchers and basic fridge filters are NOT certified to remove PFAS. You need a filter specifically designed and tested for PFAS removal. Check out our guide to the best water filters for PFAS removal for specific product recommendations.

Replace filters on schedule. A clogged or expired filter can actually release concentrated contaminants back into your water. If you prefer a filter that works without plumbing or electricity, a gravity water filter is another solid option for countertop PFAS reduction.

Switch Your Cookware

Ditch nonstick pans with PTFE/Teflon coatings. Replace them with cast iron, stainless steel, carbon steel, or certified PFAS-free ceramic cookware. The switch is easier and cheaper than most people expect. If you’re unsure whether non-stick cookware is safe, our full breakdown of the topic covers the risks.

Avoid Treated Fabrics and Furniture

Skip stain-resistant treatments on carpets and furniture. When shopping for outdoor clothing, look for brands that explicitly state “PFAS-free” or “PFC-free” water resistance. Many brands now use silicone-based or wax-based water repellents instead.

Check Your Cosmetics

Look for cosmetics labeled PFAS-free, or check the ingredient list for anything containing “fluoro” in the name (like PTFE, polyfluoroethylene, or perfluorononyl). Several clean beauty brands now market specifically as PFAS-free.

Be Careful with Food Packaging

Avoid heating food in fast food wrappers or takeout containers. Transfer food to a plate or non-toxic food storage container before microwaving. While the FDA’s phase-out of PFAS in food packaging is a positive step, existing treated packaging may still be in circulation.

Test Your Water

If you’re on a public water system, your utility should have PFAS testing data available (check the EPA’s PFAS data or contact them directly). If you’re on a private well, you’ll need to get your water tested independently. Home test kits are available, though professional lab testing is more accurate.

Our guide on how to test your water quality walks through the options step by step.

How PFAS Get Destroyed (Spoiler: It’s Hard)

One of the reasons PFAS contamination is so persistent is that these chemicals are incredibly difficult to destroy. Standard water treatment processes don’t break them down. Incineration requires temperatures above 1,000 degrees Celsius, and even then, incomplete combustion can create new PFAS byproducts.

Researchers are working on several promising approaches, including supercritical water oxidation, electrochemical treatment, and a 2023 Northwestern University method using sodium hydroxide and DMSO to break carbon-fluorine bonds at relatively low temperatures. But none of these methods are ready for large-scale water treatment yet.

For now, the practical solution for individuals is filtration. You can’t destroy the PFAS in your water at home, but you can remove it before it reaches your glass.

What Readers Want to Know

How do I know if my water has PFAS? Check the EWG’s interactive PFAS contamination map at ewg.org. You can search by zip code to see documented contamination near you. For definitive results, get your water tested through a certified lab. If you’re on a public system, your water utility should have test data available in their annual Consumer Confidence Report.

Does boiling water remove PFAS? No. Boiling water actually concentrates PFAS because the water evaporates but the chemicals don’t. The only effective home treatment methods are reverse osmosis and activated carbon filtration.

Are PFAS banned in the U.S.? Not broadly. The EPA has set drinking water limits for a few specific PFAS compounds, and some states have restricted PFAS in consumer products. But PFAS as a class are not banned. Thousands of PFAS compounds remain legal and in active use.

Can I get PFAS out of my body faster? There’s no proven medical treatment to accelerate PFAS elimination from your body. Your liver and kidneys process and excrete PFAS naturally, but slowly (half-life of 2.7 to 8 years depending on the compound). The best strategy is to minimize ongoing exposure so your body’s natural elimination process can gradually reduce your levels over time. Some preliminary research suggests that blood donation may slightly reduce PFAS levels, but this hasn’t been conclusively proven.

Is bottled water PFAS-free? Not necessarily. Some bottled water brands have tested positive for PFAS. Consumer Reports tested dozens of bottled water brands and found detectable PFAS in several. If you’re relying on bottled water to avoid PFAS, check whether the brand publishes third-party test results. A home RO filter connected to your tap is more reliable and significantly cheaper over time. You can also consider an under-sink water filter if a full RO system feels like overkill.

Should I be worried? The honest answer: yes, but not panicked. PFAS exposure is widespread and the health effects are real, but they’re dose-dependent. Reducing your exposure through water filtration and product choices can meaningfully lower your risk. According to NonToxicLab, the biggest thing you can do right now is filter your drinking water with a system certified for PFAS removal, because water is typically the largest single source of ongoing exposure.

Focus on these 2-3 PFAS exposure sources first: Drinking water and food-contact materials (PFAS-coated cookware, microwave popcorn packaging, fast-food wrappers) account for the largest share of daily PFAS intake for most adults. Filtering tap water with a certified NSF/ANSI 58 reverse osmosis or NSF/ANSI 53 activated carbon filter addresses drinking water. Switching away from worn nonstick cookware addresses the second major route. Lower-priority: outdoor gear, stain-treated textiles, and PFAS in cosmetics contribute but at lower daily doses.

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What we don’t fully know: Long-term data on low-level chronic exposure to many of these chemicals is still limited, and human relevance of findings from animal studies is not always established. Evidence is mixed in some areas, and researchers continue to refine exposure thresholds and risk models.

Safer Alternatives

If PFAS forever chemicals concern you, these guides show which products have eliminated them:

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