Since the EPA announced its new PFAS strategy, the question we get most is simple: does a Berkey actually remove PFAS?
Here is the honest, complete answer, in the order the evidence deserves:
In independent lab testing, Berkey Phoenix elements reduced PFOA and PFOS to below the reporting limit, at every checkpoint through 1,500 liters of water. That is a real, documented result from an accredited lab, and the full report is public. What it is not is an NSF certification for PFAS reduction, a health guarantee, or a replacement for your utility’s treatment. All three distinctions matter, so let us walk through them properly.
Why carbon is relevant to PFAS at all
PFAS molecules are attracted to carbon surfaces, which is why carbon adsorption is one of the recognized treatment approaches for PFAS — utilities use granular activated carbon beds at municipal scale for exactly this reason. Berkey elements are carbon-based media, so the mechanism is not exotic. But utility carbon beds and a countertop gravity filter are engineered very differently, sized very differently, and operated by very differently trained people. The lab data below tells you what the filter did in a test. It does not tell you that a countertop system replaces a treatment plant.
What the testing actually measured
The details, from the published report:
- PFOA: challenge water at 0.5 µg/L, reduced to below 0.005 µg/L at every checkpoint — start, 250, 500, 1,000 and 1,500 liters (RAYNU Analytical, report 2511001, 2025).
- PFOS: challenge water at 1.0 µg/L, reduced to below 0.005 µg/L through 1,500 liters, about 396 gallons (same report).
- Challenge levels: 0.5 and 1.0 µg/L are 125 to 250 times the federal 4 parts-per-trillion limit for PFOA and PFOS — deliberately harder than the water most households start with.
- Scope: the Phoenix testing covered 7 PFAS compounds in total. Black Berkey elements were separately tested to NSF/ANSI protocols (PFOA 1.00 µg/L to below 0.002 µg/L; Envirotek report 16-296-PFOA) and are not NSF certified.
Certification, stated precisely
This is the part where a lot of filter marketing gets slippery, so here are the facts about Phoenix elements:
- NSF/ANSI 42 — certified for chlorine, taste and odor reduction.
- NSF/ANSI/CAN 372 — certified for lead-free materials. Standard 372 covers the lead content of the product’s own materials. It is not a lead-reduction claim.
- PFAS reduction — tested, not certified. There is no NSF certification behind the PFAS numbers. They rest on independent accredited lab reports, which are published in full and worth reading yourself.
Certification means a third party continuously verifies a product against a defined standard. A lab report means a specific test, under specific conditions, produced a specific result. Both are useful. They are not the same thing, and any dealer who blurs the line — including us — should be corrected.
What can change the result in your kitchen
Lab tests use spiked water under controlled conditions. Your water is not spiked, and your kitchen is not a lab. The lab reports themselves note that results are measured under controlled conditions and can vary with your water, flow rate and filter care. The main variables:
- Water chemistry: competing contaminants, minerals and organic matter can occupy carbon media.
- The PFAS mix: PFOA and PFOS are two of thousands of PFAS compounds. Short-chain compounds behave differently than long-chain ones under carbon treatment. A strong result on PFOA and PFOS is not automatically a strong result on every other PFAS.
- Flow rate and element age: faster flow means less contact time; loaded media means less capacity.
- Care: priming, cleaning and replacing elements on schedule all affect performance.
Berkey systems are designed for water that has already been treated — municipal supply or a well you understand — and the published results reflect that intended use.
Where home filtration actually fits
Your utility is the regulated line of defense. The 4 ppt limits for PFOA and PFOS are enforceable, with compliance deadlines out to 2029, and many utilities are still building or upgrading treatment. The EPA’s new PFAS TECH strategy is aimed at that work — pilots, research funding and technical guidance, not new household mandates. If you’re on a private well, there is no utility layer above you at all.
That landscape is exactly where point-of-use filtration makes sense: as an additional layer you control between pull notifications, utility upgrades and whatever your specific water contains.
Test first, then decide
Before buying any filter — ours included:
- Read your utility’s annual Consumer Confidence Report and any state PFAS monitoring data for your system.
- On a private well, use an EPA-certified lab for a PFAS panel; a generic home test strip will not detect it.
- If your results show a real problem — especially on a private well — talk to your local health department about treatment options and rebates before spending money.
What we will not claim
- We will not claim Berkey elements are certified for PFAS removal. They are tested, and the reports are public.
- We will not claim they remove all PFAS, or any percentage, from your water.
- We will not make health claims about PFAS exposure.
- We will not suggest a countertop filter replaces your utility’s compliance treatment or a boil-water advisory.
What we will say: the results are documented, the reports are readable, and you should verify any claim a dealer makes — including everything in this article — against the primary documents. That is exactly how we’d want to be checked.
Full disclosure: we run BerkeyHome.com, a Berkey dealer — take that bias as you will.
Sources and further reading: the complete Berkey test results and lab reports, our breakdown of the EPA’s new PFAS strategy, and 20 head-to-head gravity filter comparisons. Ready to look at the hardware? See the Berkey Phoenix Elements.
