What are PFAS?
PFAS (per- and polyfluoroalkyl substances) are a family of over 10,000 synthetic chemicals used since the 1950s in numerous industrial and consumer products: non-stick coatings, food packaging, waterproof textiles and firefighting foams.
They are called “forever chemicals” because their carbon-fluorine bonds are extremely stable. They do not break down naturally in the environment and can accumulate in water, soil and living organisms.
Why PFAS are a concern
The scientific community is studying the potential effects of PFAS on human health. Concerns identified in the literature include:
- Studies linking certain PFAS to immune system disruption
- Research suggesting potential effects on the endocrine system
- PFOA classified as a possible carcinogen by the IARC
- Their persistence in the body (half-life of several years for some compounds)
Important: The presence of PFAS in tap water varies greatly depending on the region and proximity to industrial sites. Check with your local water company for quality reports.
How to filter PFAS: available methods
Activated carbon
Activated carbon (granular or block) is the most widespread and accessible method for households. It works by adsorption: pollutant molecules bind to the porous surface of the carbon. The scientific literature indicates that activated carbon can help reduce the concentration of certain PFAS, particularly long-chain compounds (PFOA, PFOS).
Reverse osmosis
Reverse osmosis forces water through a semi-permeable membrane that retains most contaminants. Theoretically the most effective method, but with drawbacks: high cost, complex installation, water waste (2 to 3 litres rejected per litre filtered) and removal of beneficial minerals.
UV treatment
UV disinfection is primarily effective against micro-organisms. It does not filter PFAS per se, but is a useful complement in a multi-stage filtration system for microbiological safety.
What an activated carbon filter like Puramane does
The Puramane filter uses a system with 8 filtration stages including activated carbon and a UV lamp. Activated carbon is recognised for helping to reduce certain pollutants, including some PFAS.
- Removes chlorine and bad tastes/odours
- Retains sediments, particles and impurities
- Helps reduce the concentration of certain organic pollutants via activated carbon
- Disinfects via UV for additional microbiological safety
- Preserves minerals (calcium, magnesium)
Transparency: We do not claim the Puramane filter removes all PFAS entirely. Activated carbon helps reduce certain of these compounds, but only a specific certification could guarantee a precise reduction rate. Our priority: honesty with our customers.
8 filtration stages, activated carbon + UV
The Puramane filter from €44.90. Cartridges x2 at €24.90. 2-year warranty.
Discover the filter →Frequently asked questions
Does activated carbon filter PFAS?
Activated carbon is recognised for helping to reduce the concentration of certain PFAS in water, particularly long-chain compounds such as PFOA and PFOS. Effectiveness varies depending on the type of carbon, pore size and flow rate. It is not a total removal but a significant reduction according to the scientific literature.
Does my tap water contain PFAS?
It is possible. In the UK, PFAS have been detected in drinking water in several regions, particularly near industrial sites. EU regulation has set maximum levels for PFAS in drinking water since 2026. You can check your local water company's quality reports.
What is the best method for filtering PFAS?
Several methods are studied: activated carbon (granular or block), reverse osmosis and ion-exchange resins. Activated carbon is the most accessible method for households. Reverse osmosis is more effective but also more expensive and generates wastewater.