You may have seen the term PFAS appearing more frequently in coverage of water quality, environmental health, and food safety. In 2023 and 2024, a series of studies and regulatory actions in the US, Europe, and Australia brought these compounds to wider public attention – and raised legitimate questions about what they mean for drinking water quality globally.
PFAS stands for per- and polyfluoroalkyl substances. There are thousands of individual compounds in this category. What they share is a carbon-fluorine bond that is one of the strongest in chemistry – which is why they are useful in so many industrial and consumer applications, and why they are simultaneously so persistent in the environment.
Here is a clear-eyed explanation of what PFAS are, how they get into drinking water, what the health picture looks like, and what filtration technology can and cannot do about them.
What PFAS Are
PFAS are a large group of synthetic chemicals that have been manufactured and used in industry and consumer products since the 1940s. They appear in non-stick cookware, water-resistant clothing, food packaging, firefighting foam, and hundreds of industrial processes.
Their defining characteristic, chemical stability, makes them extraordinarily durable. PFAS do not break down naturally in the environment. They accumulate in soil, water, and living organisms, including the human body. This persistence is why they are colloquially known as ‘forever chemicals.’
The two most studied PFAS compounds are PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulfonate), both of which have been phased out in many countries but remain detectable in water sources worldwide due to historical contamination.
How PFAS Get Into Drinking Water
PFAS enter water supplies through several pathways. Industrial discharge from manufacturing facilities that use PFAS compounds is one of the primary routes. Firefighting foam, used extensively at airports and military installations, contains high concentrations of PFAS that leach into groundwater over time.
Agricultural land treated with PFAS-containing sludge from wastewater treatment plants represents another significant pathway. Once PFAS reach the water table or surface water used for drinking water supply, conventional water treatment processes struggle to eliminate them effectively.
Concentrations vary significantly by geography, depending on proximity to historical industrial activity and the specific treatment capabilities of local water utilities.
The Health Picture
The epidemiological evidence on PFAS and human health has been accumulating for over two decades. The most consistent associations in the research literature link certain PFAS compounds to elevated cholesterol levels, immune system effects, thyroid function disruption, and some forms of cancer at higher exposure levels.
Regulatory positions have been moving in response to the evidence. The US Environmental Protection Agency introduced maximum contaminant levels for several PFAS compounds in 2024. The European Union has been tightening drinking water standards under the revised Drinking Water Directive. The regulatory direction of travel is consistent: limits are getting stricter as the evidence base grows.
It is important to note that the health effects associated with PFAS in the research literature are typically associated with higher levels of exposure than those found in most municipal drinking water supplies. The concern is not acute toxicity but long-term accumulation, which is precisely why the ‘forever chemical’ framing is apt.
What Filtration Technology Can Do
Not all water filtration systems address PFAS. Standard activated carbon filters provide partial reduction of some PFAS compounds, but the performance varies significantly depending on the specific compound, the carbon type, and the contact time.
The most effective technologies for PFAS reduction in drinking water are granular activated carbon (GAC) at sufficient depth and contact time, high-pressure membrane systems including reverse osmosis and nanofiltration, and specialised ion exchange resins designed for PFAS capture.
NSF International, the independent body that certifies water filtration systems, has developed testing standards specifically for PFAS reduction. NSF/ANSI 58 covers reverse osmosis systems and includes PFAS performance testing. NSF/ANSI 53 covers activated carbon systems with specific contaminant reduction claims. When evaluating filtration systems for PFAS reduction, NSF certification to these standards is the meaningful benchmark.
What This Means for Commercial Environments
For businesses in the UAE and GCC, advanced multi-stage filtration systems that include PFAS reduction capability provide the most comprehensive water quality assurance available, regardless of the starting point.
Sprudel’s NSF-certified filtration systems use advanced multi-stage technology including PFAS reduction capability. If water quality is a priority for your organisation, we’d welcome a conversation.