Filters containing activated carbon or reverse osmosis membranes have been shown to be effective at removing PFAS from water supplies. All water treatment units require regular maintenance to work properly. Water treatment units that are not properly maintained will lose their effectiveness over time.

In 2026, the removal of PFAS ("forever chemicals") from water is primarily achieved through three proven industrial and home-scale technologies: Activated Carbon, Ion Exchange, and Reverse Osmosis. Granular Activated Carbon (GAC) is the most common method; it acts like a sponge, adsorbing the PFAS molecules onto its porous surface. Ion Exchange (IX) uses specialized resins that attract the negatively charged PFAS ions, often proving more effective for "short-chain" PFAS that GAC might miss. For home use, high-quality multi-stage Reverse Osmosis (RO) systems are the "gold standard," as they use a semi-permeable membrane to physically filter out the chemicals. New for 2026, Australian scientists have also pioneered "nano-cages"—molecular-sized traps that can selectively target and remove toxic PFAS from large water bodies more efficiently than traditional filters.