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FilterScored

Water · Best-of

Best Water Filter for PFAS

The best PFAS water filter is one certified for PFOA/PFOS on an official database, not merely 'tested to' reduce them.

PFAS ('forever chemicals') need a filter certified to NSF/ANSI P473, or 53 + 401 covering PFOA and PFOS, or NSF/ANSI 58 for reverse osmosis. We rank only units with that certification on an official database.

How we score: We require a verifiable P473, 53+401, or 58 PFOA/PFOS certification, then rank by composite score.

  1. 17.5
    Culligan US-EZ-4 Under-Sink

    The Culligan US-EZ-4 Under-Sink is a under sink water filter. It is third-party certified (IAPMO) to reduce chlorine taste and odor, chloramine, lead, mercury, cysts, VOCs, MTBE, turbidity, PFOA, PFOS. It is also marketed for pharmaceuticals, for which we found no accredited third-party certification (so we award no certification credit; this is not a finding that it fails to reduce them). Running cost works out to about $0.091 per gallon.

    • Certified to reduce: chlorine taste and odor, chloramine, lead, mercury, cysts, VOCs, MTBE, turbidity, PFOA, PFOS
    • Cartridge life: 500 gallons
    • Cost per gallon: $0.091
  2. 27.2
    Aquasana AQ-5200 Under-Sink

    The Aquasana AQ-5200 Under-Sink is a under sink water filter. It is third-party certified (WQA) to reduce lead, chlorine taste and odor, chloramine, PFOA, PFOS, VOCs. Running cost works out to about $0.148 per gallon.

    • Certified to reduce: lead, chlorine taste and odor, chloramine, PFOA, PFOS, VOCs
    • Cartridge life: 500 gallons
    • Cost per gallon: $0.148
  3. 37.2
    AquaTru Classic Countertop RO

    The AquaTru Classic Countertop RO is a ro water filter. It is third-party certified (IAPMO) to reduce lead, PFOA, PFOS, fluoride, arsenic, chromium-6, nitrate, chlorine taste and odor, chloramine, VOCs. It is also marketed for microplastics, for which we found no accredited third-party certification (so we award no certification credit; this is not a finding that it fails to reduce them). Running cost works out to about $0.287 per gallon.

    • Certified to reduce: lead, PFOA, PFOS, fluoride, arsenic, chromium-6, nitrate, chlorine taste and odor, chloramine, VOCs
    • Cartridge life: 600 gallons
    • Cost per gallon: $0.287
  4. 44.9
    ZeroWater 5-Stage Pitcher (7-Cup)

    The ZeroWater 5-Stage Pitcher (7-Cup) is a pitcher water filter. It is third-party certified (IAPMO) to reduce chlorine taste and odor, lead, chromium-6, mercury, PFOA, PFOS. It is also marketed for total dissolved solids (TDS), for which we found no accredited third-party certification (so we award no certification credit; this is not a finding that it fails to reduce them). Running cost works out to about $1.167 per gallon.

    • Certified to reduce: chlorine taste and odor, lead, chromium-6, mercury, PFOA, PFOS
    • Cartridge life: 15 gallons
    • Cost per gallon: $1.167

FAQ

Do reverse-osmosis systems remove PFAS?
RO membranes reduce PFAS well, but you still want the unit certified to NSF/ANSI 58 so the claim is verified rather than assumed.
Is the EPA limit for PFAS strict?
Yes. The EPA's 2024 rule set enforceable limits of 4 parts per trillion for PFOA and PFOS. Note that many filter certifications were validated against an older, higher reference level.