What Water Filters Actually Remove PFAS? (Not All of Them Do)
PFAS are in more tap water than most people realize. See which filter types are proven to remove them — and which ones don't cut it.
PFAS removal — NSF 58 RO systems and certified carbon / pitcher options
PFAS contamination affects roughly 45% of US tap water. But not every filter removes PFAS — in fact, most popular filters do almost nothing. This guide tells you exactly which filter technologies work, which certifications to look for, and how to match the right solution to your specific situation.
San Antonio is a top search for PFAS & water quality — see our San Antonio water quality report (graded D+ · 58/88).
Houston has among the highest PFAS levels of any major US city — see our Houston water quality report for the scored breakdown, letter grade, and filter picks.
Los Angeles has chromium-6 above California health goals and 11.4 ppt PFAS — see our Los Angeles water quality report for the full contaminant profile and filter recommendations.
Philadelphia and Chicago both exceed EPA PFAS limits — see our Philadelphia water quality report and Chicago water quality report for city-specific grades and filter picks.
What Makes PFAS Hard to Filter
PFAS compounds are extremely stable — that's the same property that makes them persist in the environment. They are dissolved in water at very low concentrations (parts per trillion), which means physical size-based filtration alone is not sufficient. Effective PFAS removal requires either adsorption (binding to filter media) or physical exclusion through an extremely tight membrane.
Joe's Top Picks: Best NSF-Certified Filters for PFAS Removal
Recommendations from Joe Letorney, 30-year water treatment expert
🥇 Pitcher — Clearly Filtered Water Pitcher
One of the only pitchers with documented PFAS removal. NSF/ANSI 42 & 53 certified, removes 99.9% of PFOA and PFOS. Most pitcher filters don't touch PFAS — this one does.
🥇 Countertop — Waterdrop K19-S Countertop RO
Reverse osmosis is the gold standard for PFAS removal. No installation needed — just plug in and pour. Certified to remove PFAS, lead, and 90+ contaminants. Best option for renters.
🥇 Under-Counter — Waterdrop G3P600
The most thorough PFAS solution for homeowners. Tankless RO, 600 GPD, removes 99%+ PFAS including PFOA, PFOS, and emerging PFAS variants. Smart TDS display so you always know your water quality.
Want to know if PFAS has been detected in your city's water? Check: San Antonio · Houston · Los Angeles · Phoenix
Filters That Do NOT Remove PFAS
Boiling is particularly important to address: boiling water does not remove PFAS. It concentrates PFAS as water evaporates, making the remaining water more contaminated, not less.
How to Choose
How to Know If You Have PFAS in Your Water
Enter your ZIP code on WaterCheckup to check your public water system's PFAS testing results from the EPA's UCMR5 monitoring program. For example, see PFAS in San Antonio water on our city report. If you are on well water, you need a certified lab test — well water is not included in the EPA monitoring data.
Also worried about lead? Lead and PFAS often co-occur in older city water systems. See our best water filters for lead removal guide — we break down which NSF 53-certified options handle both contaminants.
Frequently asked questions
What water filters remove PFAS?
Reverse osmosis systems and activated carbon filters certified for PFAS removal are the most effective. The Waterdrop G3P600 and Waterdrop K19-S countertop RO both remove 99%+ of PFAS. The Clearly Filtered pitcher is the best non-RO option for PFAS removal.
Do Brita or PUR filters remove PFAS?
Standard Brita and PUR pitcher filters are not certified to remove PFAS. You need a filter specifically certified for PFAS reduction such as the Clearly Filtered pitcher or a reverse osmosis system.
What are PFAS and why are they dangerous?
PFAS, or per- and polyfluoroalkyl substances, are a group of man-made chemicals used in industrial and consumer products since the 1940s. They are called forever chemicals because they do not break down in the environment or the human body. Exposure has been linked to cancer, thyroid disease, immune system disruption, and developmental issues in children.
How do I know if my tap water has PFAS?
You can check your city's PFAS levels for free at WaterCheckup.com, which pulls data from EPA databases including the UCMR5 PFAS testing program. You can also order a certified mail-in lab test for the most accurate results.
Is reverse osmosis the best way to remove PFAS?
Yes. Reverse osmosis is considered the gold standard for PFAS removal, capable of removing 99%+ of PFAS compounds including PFOA and PFOS. Activated carbon filters certified for PFAS can also be effective but vary by brand and certification.
Match a certified filter to your water source, concern, and home situation.
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