Your Free Guide to Understanding Forever Chemicals

What Are Forever Chemicals and Where Do They Come From?

Forever chemicals are human-made substances that don't break down naturally in the environment or in your body. Scientists call them PFAS, which stands for per- and polyfluoroalkyl substances. The name "forever chemicals" comes from the fact that once they're released into the world, they stay there essentially forever.

Get Your Free Hyundai Warranty Status Guide →

These chemicals were first created in the 1940s. Companies discovered that PFAS had remarkable properties: they repelled water and oil, resisted heat, and didn't stick to surfaces. These qualities made them incredibly useful for manufacturing. Starting in the 1950s, PFAS became widespread in industrial and consumer products.

The two most common forever chemicals are PFOA and PFOS. PFOA was used heavily by the chemical company DuPont to make Teflon, the nonstick coating on pans and cookware. PFOS was used in Scotchgard fabric protector and similar water-repellent treatments. Over decades, companies found thousands of uses for PFAS chemicals.

Today, forever chemicals appear in many everyday products. They're in nonstick cookware, food packaging (especially fast food wrappers and pizza boxes), stain-resistant fabrics on furniture and carpets, waterproof clothing, some cosmetics, and firefighting foams used at airports and military bases. They're also used in semiconductor manufacturing and other industrial processes.

The Environmental Protection Agency (EPA) has identified more than 9,000 different PFAS chemicals in use. New ones are created regularly. Because these chemicals don't break down, anything made with them from the past several decades is still releasing PFAS into our environment today.

Practical takeaway: Forever chemicals are in many common household items you might use daily. Understanding which products contain them is the first step toward reducing your exposure.

How Forever Chemicals Enter Your Body and Environment

Forever chemicals move through the environment in several pathways. The primary route for most people is drinking water. PFAS chemicals can seep into groundwater from landfills, manufacturing sites, and airports where firefighting foam was used. Once in water supplies, they're difficult to remove through standard water treatment processes.

Free Guide to Fishing Licenses and Requirements →

According to the EPA, PFAS have been detected in the drinking water of millions of Americans. A 2022 study found that PFAS contamination is widespread across the United States. Some of the highest concentrations appear near military bases, airports, chemical manufacturing facilities, and areas where aqueous film-forming foams (AFFF) were used for firefighting training.

You can also ingest PFAS through food. These chemicals accumulate in fish and shellfish, particularly in contaminated waterways. Dairy products and meat can contain PFAS because livestock drink contaminated water and eat contaminated feed. Food packaging is another significant source—the grease-resistant coatings on fast food wrappers, microwave popcorn bags, and pizza boxes can transfer PFAS into fatty foods.

Inhalation is another exposure route. Workers in manufacturing facilities may breathe in PFAS particles. People living near chemical plants or airports may be exposed through air. Indoor dust in homes and offices can contain PFAS particles from degrading furniture, carpets, and textiles.

Once PFAS enter your body through any of these routes, they don't leave easily. These chemicals accumulate in blood, liver, and kidneys. Because they're so resistant to breakdown, they build up over time. The body eliminates PFAS very slowly—some types have half-lives of several years, meaning it takes years for even half the amount to leave your system.

Forever chemicals also persist in the environment. They leach from landfills into soil and groundwater. Wastewater treatment plants can't remove them completely, so treated wastewater releases PFAS into rivers and streams. From there, they contaminate drinking water supplies downstream. This creates a cycle where PFAS continue spreading through environmental systems indefinitely.

Practical takeaway: Multiple pathways bring PFAS into your body, with drinking water and food being the most common. Understanding these routes helps you make informed choices about reducing exposure.

Known Health Effects and Current Research

Scientists have been studying the health effects of PFAS for several decades. Research shows that exposure to high levels of certain PFAS chemicals is linked to several health concerns. The EPA and other health organizations continue to investigate these connections.

Your Free Guide to Maurices Card Payments →

Studies of workers in PFOA-manufacturing facilities showed associations with liver damage, thyroid disease, and kidney problems. People living near contaminated water sources showed elevated levels of PFAS in their blood. Researchers found links between PFAS exposure and increased cholesterol levels, which is a risk factor for heart disease.

In children, some research suggests connections between PFAS exposure and reduced vaccine response. This means that children with higher PFAS levels in their blood may not develop immunity to certain diseases as effectively after vaccination. Other studies found associations between PFAS exposure and delayed puberty in girls.

Animal studies have shown that PFAS can cause liver damage, immune system suppression, and thyroid disease. Laboratory research indicates that certain PFAS chemicals may act as endocrine disruptors, meaning they interfere with hormone systems in the body.

The health organization organizations classify PFOA as a possible human carcinogen, though the evidence isn't conclusive. Some animal studies suggest links to cancer, but human studies haven't proven this definitively. Research is ongoing.

It's important to note that most Americans have detectable levels of PFAS in their blood, according to CDC measurements. The levels vary widely. Most people have amounts that are below thresholds where immediate health effects are documented, but scientists debate what level is truly safe. The EPA and other agencies continue to review what levels of exposure pose health risks.

Vulnerable populations may face higher risks. Infants and young children, pregnant women, and people with existing liver or kidney disease may be more susceptible to PFAS effects. Workers in certain industries have higher occupational exposure.

Practical takeaway: While research continues, documented health concerns include liver damage, thyroid disease, and immune effects at high exposure levels. Understanding the current state of research helps you evaluate your own risk factors.

How to Reduce Your Personal Exposure to Forever Chemicals

While it's impossible to completely avoid PFAS in modern life, you can take steps to reduce your exposure. These strategies focus on the main sources: drinking water, food, and household products.

Get Your Free Guide to Optimum Bill Payment Options →

Drinking Water: If you're concerned about PFAS in your tap water, several filtration options exist. Activated carbon filters can reduce PFAS levels, though effectiveness varies. Reverse osmosis systems are more effective at removing PFAS. Point-of-use filters (filters on individual taps) treat water where you use it, while whole-house systems treat all water entering your home. You can contact your local water utility to request a water quality report that shows whether PFAS have been detected in your area. The EPA maintains a database of water systems and their test results.

Food Choices: Choose foods that tend to have lower PFAS concentrations. Fruits, vegetables, and grains generally have lower levels than animal products. When choosing animal products, diversify your sources rather than relying heavily on fish from potentially contaminated waterways. Research local fish consumption advisories if you eat recreationally caught fish. Reduce consumption of food in grease-resistant packaging when possible. Avoid microwaving food in coated packaging. Use glass or ceramic dishes for cooking and storage instead of nonstick cookware, or use nonstick cookware made without PFAS (some newer products avoid these chemicals).

Household Products: When buying new furniture or carpets, you can ask manufacturers whether their products contain PFAS-based stain treatments. Some companies now offer PFAS-free options. Avoid fabric protector sprays like Scotchgard, or look for PFAS-free alternatives. Choose clothing and outdoor gear labeled as PFAS-free when available. Check cosmetics labels, though PFAS aren't always listed specifically—look for products that avoid water-resistant and long-lasting claims on items like mascara and foundation.

Home Dust: Regular cleaning reduces indoor dust that may contain PFAS particles. Wet-cleaning methods (mopping, wiping