Brian Barton
Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic organofluorine chemical compounds that have been used in consumer products since the 1940s or 1950s. PFAS are found in water, air, soil, food, and consumer products like clothing, cosmetics, and packaging. PFAS pollution, also known as 'forever chemicals' or forever pollutants, is a global issue due to the chemicals' persistence in the environment and their toxic effects on human and animal health. The contamination comes from industrial dumping, seepage into groundwater, and the burning of PFAS-containing products. PFAS exposure has been linked to various health issues, including cancer, reproductive harm, thyroid problems, and decreased immunity.
| Characteristics | Values |
|---|---|
| What are PFAS? | Per- and polyfluoroalkyl substances (PFAS) are a large, complex group of synthetic chemicals that have been used in consumer products since about the 1950s. |
| Where are PFAS found? | PFAS are found in water, air, soil, food, fish, clothes, cosmetics, personal care products, and industrial products. |
| How do PFAS enter the environment? | Industrial dumping of PFAS into rivers, lakes, and streams; seepage into groundwater from landfills and incineration of PFAS-containing waste; release from industry smokestacks; ocean waves and rain. |
| How do PFAS affect human health? | Exposure to PFAS has been linked to various health issues, including cancer (kidney, prostate, testicular), thyroid disease, decreased immunity, decreased fertility, hypertensive disorders in pregnancy, developmental issues in children, obesity, and higher rates of hormone interference. |
| What is being done to address PFAS pollution? | The Biden administration has taken steps to increase research and put pressure on manufacturers to limit pollution. The EPA has set limits on certain PFAS chemicals in drinking water. Some countries are planning further reductions and phase-outs, while others have not ratified agreements or lobbied for reduced regulations. |
| How can consumers avoid PFAS? | Check brand websites or contact customer service to inquire about PFAS-free products. Look for PFAS-free labels on outdoor gear, apparel, and other products. |
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What You'll Learn
PFAS pollution sources
PFAS pollution is widespread, with PFAS chemicals present in the blood of people and animals worldwide. PFAS pollution sources can be divided into several categories, including industrial processes, consumer products, and environmental pathways.
Industrial Processes
PFAS are used in various industrial processes, including chrome plating, electronics manufacturing, and textile and paper production. They are also used in firefighting foams, particularly in military and aviation settings, and have been disposed of in landfills or incinerated, leading to the release of PFAS into the environment.
Consumer Products
PFAS are found in many consumer products, including clothing, shoes, and accessories, and household items. They are used to create water-resistant and stain-resistant fabrics, non-stick cookware, cleaning products, personal care products, and food packaging. These products can directly expose consumers to PFAS during their use and can also contaminate the environment during their production and disposal.
Environmental Pathways
PFAS can enter the environment through air emissions, spills, and the disposal of manufacturing wastes and wastewater from industrial facilities. They can contaminate water systems, including rivers, lakes, streams, and groundwater, as well as the soil and air. PFAS can also enter the food chain, with fish and dairy products being common sources of exposure.
Other Sources
PFAS pollution can also come from legacy disposal areas, such as landfills containing industrial and commercial waste from as early as the 1950s. Additionally, PFAS can be released into the environment during the manufacturing and use of PFAS-containing products.
It is important to note that the complex nature of PFAS chemicals and their widespread use present significant challenges in studying and addressing PFAS pollution.
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PFAS health risks
Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals used in commercial and industrial applications. PFAS have been used in industry and consumer products since the 1940s due to their useful properties. They are highly resistant to degradation and can be found in water, soil, air, food, and materials in our homes or workplaces. PFAS exposure can occur through drinking water, food, dust, or atmospheric and marine transport.
PFAS exposure has been linked to various health risks, although the specific effects may vary depending on the type of PFAS, the level of exposure, and individual factors. Some of the potential health risks associated with PFAS exposure include:
- Increased risk of certain cancers, such as kidney, testicular, and prostate cancers.
- Reduced immune function, including a reduced ability to fight infections and a potential increased risk of asthma.
- Developmental delays and adverse effects in children, including low birth weight, accelerated puberty, bone variations, and behavioural changes.
- Reproductive effects, such as decreased fertility and increased risk of preeclampsia or high blood pressure in pregnant women.
- Changes in cholesterol and liver enzyme levels, with potential links to liver disease and cirrhosis.
- Increased risk of thyroid disease.
While the scientific understanding of PFAS health risks is still evolving, reducing exposure to PFAS is important for mitigating these risks. This can be achieved through regulatory measures, public health initiatives, and individual efforts to avoid consumer products containing PFAS.
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PFAS in the environment
PFAS (per- and polyfluoroalkyl substances) are a large group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain. They are resistant to heat, oil, stains, grease, and water. PFAS have been used in consumer products since the 1950s, and their production involves thousands of synthetic organic chemicals.
PFAS are found in water, air, soil, and food sources such as fish, crops, and animals. They have been detected in the blood and urine of people worldwide, with a report by the CDC finding PFAS in the blood of 97% of Americans. PFAS enter the food supply through crops and animals grown, raised, or processed in contaminated areas. Small amounts can also enter food through packaging, processing, and cookware. PFAS pollution is widespread and persistent, with a long lifespan of up to several thousand years, earning them the nickname "forever chemicals" or "forever pollutants". They do not degrade easily due to the strong carbon-fluorine bond in their chemical structure.
PFAS pollution has been detected in remote areas such as Antarctica and has impacted soil, water, and food sources. A worldwide study of 45,000 groundwater samples in 2024 found that 31% contained PFAS levels harmful to human health, even in areas not near obvious sources of contamination. PFAS pollution comes from various sources, including industrial dumping into water bodies, seepage into groundwater from landfills, burning of PFAS-containing products, and emissions from smokestacks.
The health risks associated with PFAS exposure are well-documented. Studies have linked PFAS exposure to various diseases and adverse health effects, including cancer, reproductive harm, immune system damage, thyroid disease, decreased bone mineral density, and increased risk of Type 2 diabetes. Due to their persistence and toxicity, efforts are being made to regulate and phase out PFAS. The Biden administration in the United States has taken steps to increase research and pressure on manufacturers, and some jurisdictions like China and the European Union are planning further reductions.
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PFAS in consumer products
PFAS, or per- and polyfluoroalkyl substances, are a group of chemicals made by humans. PFAS have been used in many consumer products since the 1950s due to their resistance to heat, grease, and water. They are found in a variety of everyday products, from food packaging to personal care products like shampoo and dental floss. PFAS contamination has been detected in fish, shellfish, and produce, which can enter the human body through consumption.
PFAS are present in high concentrations in household consumer products, with textiles, household chemicals, and cosmetics showing the highest average concentrations. PFAS-treated apparel and home goods, such as carpets, upholstery, and bedding, can expose consumers directly during use and release "forever chemicals" into the environment when disposed of.
Some specific examples of consumer products containing PFAS include:
- Food packaging: Plastics, grease-resistant paper, and pizza boxes can be loaded with PFAS, which can leach into food.
- Menstrual care products: A study found that most tampon, pad, and period underwear brands were contaminated with PFAS to some degree.
- Soft lenses: Tests revealed the presence of PFAS in a random sampling of popular soft lens brands.
- Non-stick cookware: PFAS have been used in non-stick coatings, such as Teflon, since 1946.
- Water-resistant fabrics: PFAS are commonly used in rain jackets, umbrellas, and tents to make them water-resistant.
While some companies have removed or committed to removing PFAS from their products, there are currently no laws in the United States requiring manufacturers to disclose the presence of PFAS in their products. Consumers concerned about PFAS exposure can look for products labelled as PFAS-free or avoid items labelled as water- or stain-repellent, which are likely to contain PFAS.
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PFAS regulation
In terms of drinking water regulations, the EPA has the authority under the Safe Drinking Water Act to set enforceable National Primary Drinking Water Regulations (NPDWRs) and require monitoring of public water systems. In April 2024, the EPA announced legally enforceable Maximum Contaminant Levels (MCLs) for six PFAS in drinking water, including limits for common contaminants such as PFOA and PFOS. The EPA has also been working on improving data collection and measurement methods for PFAS in the environment, releasing methods to test for PFAS in various matrices such as water, soil, and biosolids.
At the international level, PFAS regulation differs between regions. In the European Union (EU), the EU's POPs Regulation came into force in August 2023, and several PFAS groups are already restricted or under evaluation. The EU is committed to phasing out all PFAS, allowing their use only when proven essential and irreplaceable. Five EU member states have proposed banning the manufacture and importation of 10,000 PFAS substances to prevent a cascade of substitutions within the same class of substances.
While regulatory approaches vary, the growing public awareness of PFAS as 'forever chemicals' and their health impacts is increasing pressure on governments and environmental authorities to act. As a result, strict new regulations are being implemented worldwide, with expanding limits for PFAS in drinking water and considerations for wastewater discharge restrictions. These regulatory changes also present opportunities for investors and water technology providers to adapt to new market demands.
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Frequently asked questions
Per- and polyfluoroalkyl substances (PFAS) are a large group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain. PFAS are used in a wide range of consumer and industrial products due to their ability to resist heat, oil, stains, grease, and water.
PFAS pollution occurs when PFAS-containing products are dumped in landfills, incinerated, or directly released into rivers, lakes, and streams. The burning of PFAS-containing products and waste in incinerators also contributes to pollution. PFAS compounds are highly persistent in the environment and do not degrade easily due to their strong carbon-fluorine bonds. They can accumulate in the air, water, and soil, leading to widespread exposure.
Exposure to PFAS has been linked to various health issues, including cancer (particularly kidney, prostate, and testicular cancer), thyroid disease, decreased fertility, hypertension during pregnancy, developmental issues in children, and weakened immune systems. PFAS exposure may also delay the onset of puberty in girls, leading to potential long-term health consequences such as an increased risk of breast cancer.
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