Concerned about PFAS in drinking water? Check these filter details

Start with a documented concern

Check your public utility's report and current notices, or consult a certified laboratory about a private-well sample. Do not infer a home's PFAS level from a map, neighboring property, or a salesperson's demonstration.

If you have a result, retain the full laboratory report, including analytes, units and sample date. It is the starting point for a treatment discussion, not a reason to purchase the largest package.

Reference: CDC home-filter selection guidance

Read the certification claim, not only the technology

EPA advises looking for a PFAS reduction claim under NSF/ANSI 53 or NSF/ANSI 58. Check the exact model in the certifier's directory, including any required cartridge. The standard number alone does not mean every listed product has the same PFAS claim.

EPA also cautions that certification standards cited in its guidance did not necessarily demonstrate reduction to newer drinking-water regulatory levels. Ask what the actual certification claim means for your concern.

Reference: EPA: identifying filters certified to reduce PFAS

Make maintenance part of the decision

Request the rated capacity and replacement instructions in writing. A system with a persuasive sales sheet but no affordable or obtainable replacement cartridge is a weak long-term plan.

Record installation and replacement dates. If an installer proposes a different cartridge later, verify that it preserves the claim you relied on.

Keep the scope honest

A kitchen system serves drinking and cooking water at selected outlets; it does not automatically treat every shower or hose bib. Ask whether a refrigerator connection is included and feasible.

If the concern is confirmed, discuss whether follow-up water testing is appropriate with the relevant health department or qualified laboratory. Avoid treating a handheld meter as a PFAS test.