Table of Contents
- What Are PFAS, Exactly?
- How PFAS Get Into Your Drinking Water
- Why PFAS Are Called “Forever Chemicals”
- Who Is Most at Risk?
- How to Know If PFAS Are in Your Water
- What You Can Actually Do About It
- FAQs
You turn on the tap, fill a glass, and drink. Simple enough. But what if something invisible was already in that water before it reached you — something that doesn’t break down, doesn’t smell, and doesn’t show up on a basic water quality report?
That’s the reality for millions of households across the US right now. PFAS contamination in drinking water is one of the most talked-about water safety issues of 2026, and for good reason. This article explains what PFAS are, how they end up in your tap water, and what you can do to protect your household. What Is PFAS?
What is PFAS, exactly?
PFAS stands for per- and polyfluoroalkyl substances. It’s a group of more than 12,000 synthetic chemicals that have been manufactured and used in industrial and consumer products since the 1940s.
You’ll find PFAS in things like:
- Non-stick cookware coatings
- Water-resistant clothing and carpets
- Food packaging (especially grease-resistant wrappers)
- Firefighting foam used at airports and military bases
- Stain-resistant treatments on furniture and upholstery
The chemistry behind them is straightforward: PFAS are built around an extremely strong carbon-fluorine bond. That bond makes them incredibly useful for repelling water, grease, and heat. It also makes them nearly impossible to break down in the environment — or in the human body.
How PFAS Get Into Your Drinking Water
PFAS don’t appear in your tap water by accident. They follow a path from manufacturing sites, military bases, and industrial facilities into the soil, and from the soil into groundwater and surface water supplies.
Here’s how it typically happens:
Industrial discharge. Factories that produce or use PFAS release them into nearby waterways. Even when discharge is regulated, trace amounts can accumulate over time.
Firefighting foam runoff. Aqueous film-forming foam (AFFF) used at military bases and airports contains high concentrations of PFAS. When this foam soaks into the ground, it migrates into local groundwater — sometimes for miles.
Landfill leaching. Products containing PFAS end up in landfills. Over time, rainwater pulls PFAS out of that waste and carries them into the ground below.
Agricultural contamination. Some municipal sewage sludge used as fertilizer contains PFAS. When it’s spread on farmland, PFAS can leach into the soil and reach groundwater that feeds local wells and water treatment plants.
Once PFAS reach a water source, conventional water treatment processes don’t reliably remove them. Standard filtration and chlorination — the methods most municipal systems rely on — aren’t designed to handle these chemicals. So they pass through and come out of your tap.
Why PFAS Are Called “Forever Chemicals”
The nickname isn’t an exaggeration. PFAS don’t degrade under normal environmental conditions. They don’t break down in sunlight. They don’t biodegrade in soil. And once they enter the human body, they accumulate in blood, organs, and tissue over time.
That persistence is what makes PFAS different from many other contaminants. A heavy rain doesn’t wash them away. Boiling your water doesn’t remove them. They stay put — in the environment and in your body — which is why long-term exposure is the main concern.
Research into the health effects of PFAS is ongoing, but regulatory agencies including the EPA have identified links between PFAS exposure and a range of health concerns. The science is still developing, but the precautionary principle is clear: reducing your exposure is a reasonable and practical step to take now.
Who Is Most at Risk?
PFAS contamination isn’t evenly distributed. Some households face significantly higher exposure than others, depending on where they live and where their water comes from.
Communities near military bases or airports. AFFF foam has been used at these sites for decades. Many surrounding communities have documented PFAS contamination in their water supplies.
Households on private wells. Private wells aren’t subject to the same federal monitoring requirements as municipal systems. If your well draws from contaminated groundwater, you may not know it without testing.
Areas near industrial sites. Manufacturing facilities that produce or use PFAS — including certain chemical plants, textile mills, and semiconductor manufacturers — can contaminate local water sources.
Rural communities near agricultural land. If PFAS-containing sludge has been used as fertilizer nearby, groundwater contamination is a real possibility.
That said, PFAS have been detected in water systems across all 50 states. You don’t have to live next to a military base to be affected. Municipal water systems in major cities have also shown detectable PFAS levels.
Not sure what’s in your local water? Your municipality is required to publish an annual water quality report (also called a Consumer Confidence Report). It’s a useful starting point, though it may not test for every PFAS compound.
How to Know If PFAS Are in Your Water
There are a few ways to find out whether PFAS are present in your drinking water.
Check your local water quality report. Municipal suppliers publish these annually. Look for PFAS or PFOA/PFOS listings. Keep in mind that regulations are still catching up — not all PFAS compounds are required to be reported yet.
Use the EPA’s PFAS data resources. The EPA maintains public data on PFAS monitoring results from water systems across the country. It’s searchable and worth checking.
Get your water independently tested. Third-party lab testing is the most thorough option, especially if you’re on a private well. Look for a certified lab that tests for a broad panel of PFAS compounds, not just the most common two or three.
Testing gives you real data about your specific water. That’s more useful than general statistics, because contamination varies significantly by location.
What You Can Actually Do About It
Here’s the part that matters most: you’re not powerless here.
Once you know PFAS are a concern — whether through local news, a water report, or a test result — you can take a practical step to filter them out at home. The key is choosing the right filtration method.
What doesn’t work: Standard pitcher filters and basic carbon filters aren’t designed to remove PFAS effectively. Boiling water concentrates PFAS rather than removing them.
What does work: Filtration technologies specifically designed to target PFAS. Activated carbon filters at a sufficient contact time can reduce PFAS levels, and advanced selective filtration systems are built to go further — removing a broad range of contaminants including PFAS, lead, chlorine, chromium 6, and volatile organic compounds, without stripping out the beneficial minerals your water naturally contains.
That last point matters. Some filtration systems (reverse osmosis in particular) remove nearly everything from your water — including calcium and magnesium, which are good for you. A smarter approach targets the contaminants specifically and leaves the minerals behind.
Woder’s under-sink filters are built around exactly that principle. Their Advanced Selective Filtration technology removes 99.9% of contaminants including PFAS, while preserving the essential minerals your body actually benefits from. No whole-home system required. No plumber needed. It connects directly to your existing water line.
Not sure which filter is right for your home? Visit woder.com to use the product finder and get a recommendation based on your household’s needs.
Your tap water shouldn’t be a guessing game. Understanding PFAS is the first step — and now you have a clear picture of what they are, where they come from, and what you can do about them. The next step is making sure your household’s water is actually clean.
FAQs
What does PFAS stand for?
PFAS stands for per- and polyfluoroalkyl substances. It’s an umbrella term for a large group of more than 12,000 synthetic chemicals used in industrial and consumer products since the 1940s.
Are PFAS in all tap water in the US?
Not all tap water contains PFAS, but they have been detected in water systems across all 50 states. Communities near military bases, industrial sites, airports, and agricultural land using contaminated sludge tend to face higher risk. Checking your local Consumer Confidence Report or getting your water independently tested is the best way to know your specific situation.
Can boiling water remove PFAS?
No. Boiling water does not remove PFAS. In fact, it can concentrate them by reducing water volume. To remove PFAS from drinking water, you need a filtration system specifically designed to target them.
What are the health concerns associated with PFAS exposure?
Research is ongoing, but regulatory agencies including the EPA have identified links between long-term PFAS exposure and various health concerns. Because PFAS accumulate in the body over time and don’t break down, reducing exposure through filtration is a practical precaution many health-conscious households are taking in 2026.
Do standard pitcher filters remove PFAS?
Most standard pitcher filters are not effective at removing PFAS. Basic carbon filters may reduce some PFAS compounds at low concentrations, but they’re not designed or certified for reliable PFAS removal. Look for filtration systems that specifically list PFAS removal in their performance claims.
What is the difference between PFAS and PFOA or PFOS?
PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulfonate) are two of the most studied and historically common PFAS compounds. They’re often referenced specifically because they’ve been the focus of regulatory action. PFAS is the broader category that includes thousands of related chemicals, many of which are still being studied.
Does a Woder filter remove PFAS?
Woder’s Advanced Selective Filtration is designed to remove 99.9% of contaminants including PFAS, lead, chlorine, chromium 6, and volatile organic compounds, while preserving beneficial minerals. Visit woder.com to find the right filter model for your home.
