What is PFAS — and why is it in your water?
PFAS (per- and polyfluoroalkyl substances) are a family of thousands of synthetic chemicals used since the 1950s in everything from firefighting foam to non-stick pans. They are called forever chemicals because the carbon–fluorine bond does not break down in nature — what enters the water cycle stays there.
Why it matters in Sweden
Swedish drinking water regulation follows the EU Drinking Water Directive, with a limit of 100 ng/l for the PFAS-21 sum. Several Swedish municipalities have measured levels near or above the limit, most famously in Ronneby and around Uppsala.
How nanofiber filtration removes PFAS
Filterion's nanofiber media binds PFAS molecules through a combination of electrostatic attraction and hydrophobic interaction — capturing both long-chain (PFOS, PFOA) and short-chain compounds that carbon filters struggle with.