PFAS in drinking water: the invisible danger of forever chemicals

PFAS, also known as forever chemicals, are now a major concern when it comes to drinking water quality. Invisible, odourless and persistent, these chemical pollutants are now being detected in many water sources, including tap water.

Their presence raises legitimate questions about health risks, current regulations and truly effective filtration solutions.

In this article, we help you understand what PFAS are, why they are found in drinking water and how to limit your exposure to them.

What are PFAS, also known as forever chemicals?

Definition of PFAS

PFAS (per- and polyfluoroalkyl substances) are a group of several thousand chemical compounds that have been used for decades for their non-stick, waterproof and heat-resistant properties.

They are found in particular in:

• food packaging
• textiles
• firefighting foams
• certain cosmetics

Why are they called forever chemicals?

PFAS are extremely stable and degrade very slowly in the environment.

It is this persistence that has earned them the name ‘forever pollutants’, as they accumulate in:

• soil
• groundwater
• waterways
• drinking water

PFAS and drinking water: why are they found in tap water?

Origin of PFAS in tap water

PFAS can contaminate drinking water via:

• past or present industrial discharges
• military or airport sites
• runoff from polluted soil

As a result, PFAS in tap water has been detected in several regions of Europe.

PFAS in tap water: map and available data

In France, measurement campaigns have made it possible to establish maps showing the presence of PFAS in tap water, notably through:

• Regional Health Agencies (ARS)
• journalistic and scientific work

👉 These data show significant heterogeneity between regions.

What are the health risks of PFAS?

Scientific studies link prolonged exposure to PFAS to:

• hormonal disruption
• effects on the liver and thyroid
• a decrease in immune response
• an increased risk of certain cancers

👉 Even in small doses, their accumulation over time raises questions.

Regulation of PFAS in drinking water: where are we now?

Standards and thresholds in France and Europe

Regulations on PFAS in drinking water are gradually evolving.

New thresholds are being introduced at European level, but:

• they do not always cover all existing PFAS
• they do not guarantee water that is completely free of eternal pollutants

👉 Regulatory compliance does not mean total absence of PFAS.

Some certifications provide useful benchmarks, provided you fully understand what NSF certification actually guarantees® guarantees.

How can PFAS be filtered out of drinking water?

Not all solutions are equal

There are various solutions for dealing with persistent pollutants in water:

• filter jugs
• tap filters
• reverse osmosis
• gravity-fed PFAS water filters

Their effectiveness depends heavily on:

• the technology used
• the filter media
• the actual conditions of use

To learn more about existing solutions, we explain in detail how to filter PFAS from drinking water and compare the different technologies available.

PFAS water filters: which technologies are effective?

The most widely studied technologies for reducing PFAS are:

• high-quality activated carbon
• certain specific resins
• reverse osmosis

👉 An effective PFAS water filter must be tested and documented.

When faced with marketing promises, it is essential to know how to evaluate the actual effectiveness of a water filter based on objective and verifiable criteria.

Certain gravity filtration solutions, when properly designed and tested, can be an gravity filtration solution designed for real-world use.

Reducing exposure to persistent pollutants: a comprehensive approach

Filtering your drinking water is an important step, but it can be part of a broader approach:

• limiting the use of plastics
• avoiding certain food packaging
• learning about the quality of your local water

PFAS are not the only pollutants of concern: studies also show the presence of microplastics in tap water, raising similar issues.

CONCLUSION

The presence of PFAS in drinking water is now a documented reality.

These persistent chemical pollutants pose a major health and environmental challenge, even when the water complies with current standards.

Understanding their origin, regulation and available filtration solutions allows you to make more informed choices about your daily water consumption.

Star Water Filter®

The technical content published on this website is written and validated by the Star Water Filter® technical team.

It is based on independent laboratory analyses, performance data from the Ultimate Star Filter® and experience gained in the design and use of gravity filtration systems.