Quick take
RO is one of the strongest point-of-use treatment categories for PFAS, but verify the exact model and claim. Do not infer PFAS performance from TDS reduction or an RO membrane alone.
EPA recognizes RO as a potential PFAS treatment
EPA describes point-of-use RO as capable of potentially removing contaminants including PFAS, lead and arsenic.
Certification scope still controls the recommendation
A system may be certified under NSF/ANSI 58 for TDS reduction without carrying every optional contaminant claim. Look for exact PFAS performance data or a relevant certification.
Whole-house vs drinking-water treatment
For many households, treating the drinking/cooking tap is more economical than using whole-house RO. Whole-house PFAS treatment can instead use large carbon or ion-exchange systems when whole-home scope is justified.