Per- and polyfluoroalkyl substances (PFAS) are highly persistent synthetic chemicals that have raised major concern because of how widespread they have become in the environment.
Their exceptional chemical stability and resistance to breakdown mean they can accumulate in ecosystems over time. This naturally raises serious questions about their potential impact on both human health and the wider environment.
What Are PFAS?
PFAS are a family of man-made organic chemicals characterised by an extremely strong carbon-fluorine bond. Because they resist natural degradation, they are often referred to as “forever chemicals”.
Their unique molecular structure allows them to repel water, grease and heat, which is why they have been widely used in industrial and consumer products.
Main PFAS sub-categories include:
- PFOA (perfluorooctanoic acid)
- PFOS (perfluorooctane sulfonate)
Their persistence in the environment and tendency to bioaccumulate have made PFAS a growing public health and ecological concern.
Which Everyday Products Contain PFAS?
Because of their useful properties, PFAS have been widely used in many everyday consumer products.
- Waterproof and stain-resistant textiles
- Grease-resistant food packaging
- Certain rubber and plastic materials
- Waterproofing treatments
- Firefighting foams
- Non-stick cookware coatings
- Waterproof cosmetics
- Paper and cardboard protective coatings
- Electronic components
PFAS have also been used in automotive, aerospace and construction industries because of their heat resistance and durability.
What Are the Main Sources of PFAS Exposure?
People are exposed to these forever chemicals through multiple routes.
Food and contaminated drinking water are among the most significant sources. PFAS may be found in food packaging, non-stick cookware and groundwater affected by industrial pollution.
Indoor dust inhalation and skin contact through household products or cosmetics containing PFAS may also contribute to exposure.
Some workers face higher risks, particularly those in chemical manufacturing or firefighters using firefighting foams.
Widespread environmental contamination means PFAS can travel long distances and persist in soil, air and water, increasing concern about chronic exposure across the population.
How Do People Ingest PFAS?
PFAS can build up through the food chain, meaning exposure levels vary depending on diet and environment.
Drinking water, especially near industrial sites or former military bases, may contain elevated PFAS concentrations.
That is why at Weeplow we recommend using a gravity filter combined with an activated carbon filter. This combination can help reduce many pollutants and pesticides found in water. To understand how these systems compare with other technologies, see our guide on reverse osmosis vs gravity filters.
PFAS may also be present in some foods, including:
- Fish and seafood
- Meat, especially beef and pork
- Dairy products
- Fruit and vegetables grown in contaminated soil
- Processed foods and fast food
Where Are PFAS Found in the Environment?
Because PFAS have been used on a large scale for decades, it is no surprise they are now found widely in nature. They are present in air, water and soil, contaminating ecosystems worldwide.
In the air, PFAS can travel long distances, meaning contamination may occur far from the original source. Industrial emissions, waste incineration and everyday consumer products all contribute.
They are also found in surface water and groundwater through runoff from polluted soils, wastewater discharge and landfill leaching.
Compounds such as PFOA and PFHxA are now subject to growing regulatory monitoring in European waters.
Why Does This Matter?
PFAS contamination matters because these chemicals do not disappear easily. Once released, they may remain in the environment for many years and continue circulating through water systems, soils and living organisms.
This is why awareness, stronger regulation and reliable water filtration solutions are becoming increasingly important for households seeking greater control over their drinking water.
