Does Berkey Remove PFAS? 2026 Guide to Forever Chemicals

Does Berkey Remove PFAS? The Short Answer

Yes. Berkey Water Filters equipped with Phoenix gravity filter elements reduce PFAS compounds by 99.8% or higher, bringing output levels well below the EPA's enforceable maximum contaminant level of 4 parts per trillion.

That's the quick answer. But PFAS contamination is more widespread — and more complicated — than most people realize. If you're filtering your drinking water (or thinking about it), you need to understand what you're actually dealing with.

Let's break it down.

What Are PFAS, and Why Should You Care?

PFAS stands for per- and polyfluoroalkyl substances — a family of over 14,000 synthetic chemicals that have been manufactured since the 1940s. You'll hear them called "forever chemicals" because the carbon-fluorine bonds that hold them together are among the strongest in organic chemistry.

They don't break down. Not in water. Not in soil. Not in your body. They accumulate over time, and that's what makes them dangerous.

You've been exposed to PFAS whether you know it or not. They're in:

• Non-stick cookware (Teflon and similar coatings)
• Waterproof clothing and gear (rain jackets, tent fabrics, Gore-Tex)
• Food packaging (fast food wrappers, microwave popcorn bags, pizza boxes)
• Firefighting foam (AFFF — a major source of groundwater contamination near military bases and airports)
• Cosmetics (waterproof mascara, foundation, sunscreen)
• Stain-resistant treatments on carpets, furniture, and fabrics)

The primary concern is your drinking water. PFAS from industrial discharge, landfill runoff, and firefighting foam seep into groundwater and municipal water supplies — and standard water treatment plants weren't designed to remove them.

How Bad Is the Contamination? The Numbers Are Staggering

This isn't a localized problem. A 2023 USGS study tested 716 tap water locations across the United States and found at least one PFAS compound in roughly 45% of all tap water sampled. In urban areas, the detection rate jumped to 75%.

And that study only tested for 32 of the 14,000+ known PFAS compounds — meaning the true contamination rate is almost certainly higher.

Here's where things stand as of early 2026:

What PFAS Do to Your Health

This falls under "Your Money or Your Life" territory, so let's be precise about what the science says.

The International Agency for Research on Cancer (IARC) classified PFOA as "carcinogenic to humans" (Group 1) — the highest classification. PFOS was classified as "possibly carcinogenic" (Group 2B). The EPA's own 2024 assessment labeled both PFOA and PFOS as "likely carcinogenic to humans."

Beyond cancer, documented health effects from PFAS exposure include:

• Increased cholesterol levels
• Thyroid hormone disruption
• Weakened immune response (including decreased vaccine effectiveness)
• Liver and kidney damage
• Reproductive effects including decreased fertility
• Increased risk of preeclampsia during pregnancy
• Developmental effects in children, including low birth weight

A peer-reviewed study published in the Journal of Exposure Science & Environmental Epidemiology in 2025 estimated that PFAS in US drinking water contributes to approximately 6,864 cancer cases annually — affecting the digestive, endocrine, and respiratory systems, among others.

The half-life of PFAS in the human body ranges from 3 to 8 years depending on the compound. That means even after you stop exposure, it takes years for levels to decline.

The 2024 EPA Standard — What Changed

In April 2024, the EPA finalized the first-ever enforceable national drinking water standard for PFAS. This was a landmark regulation.

To put 4 parts per trillion in perspective — that's roughly equivalent to 4 drops of water in 20 Olympic swimming pools. The EPA set the health goal at zero for PFOA and PFOS, meaning there is no safe level of exposure.

May 2025 update: The EPA confirmed it will keep the 4 ppt limits for PFOA and PFOS but extended the compliance deadline from 2029 to 2031. The agency also announced its intent to reconsider the limits for PFHxS, PFNA, and GenX. Municipal water systems must complete initial PFAS monitoring by 2027 and meet the PFOA/PFOS standards by 2031.

Here's the takeaway: your municipal water system may not be compliant for another five years. In the meantime, point-of-use filtration is the most practical way to protect your household.

How Phoenix Gravity Filters Remove PFAS

The Phoenix Gravity Filter Elements — the current replacement for the original Black Berkey elements — use a multi-stage filtration process to address PFAS and other contaminants.

Unlike simple carbon filters, Phoenix elements combine multiple filtration media that target contaminants through different mechanisms: adsorption, ion exchange, and mechanical filtration. PFAS compounds are primarily captured through adsorption, where the molecules bind to the filter media's surface as water passes through.

Phoenix Filter PFAS Test Results

Independent laboratory testing (NABL-accredited, ISO/IEC 17025:2017 certified) verified the following PFAS reduction rates:

These results were maintained through a 1,500-liter capacity test, meaning performance held steady throughout the element's rated lifespan — not just when the filters were new.

Phoenix elements currently hold NSF/ANSI 42 (aesthetic effects) and NSF/ANSI 372 (lead content) certifications. NSF/ANSI 53 certification for PFAS is listed as pending.

How Different Water Filters Compare on PFAS

Not all filters are created equal when it comes to PFAS. Here's an honest comparison of the major filtration technologies:

The key advantage of gravity filtration over reverse osmosis for off-grid and emergency preparedness is obvious: no electricity, no plumbing, no water waste. You fill it, gravity does the work. For anyone living off-grid, in a rural area with well water, or building an emergency water supply — that independence matters.

For a deeper dive on gravity vs RO systems, check out our Berkey vs Reverse Osmosis comparison.

Long-Chain vs Short-Chain PFAS — Why It Matters for Filtration

Here's something most filter companies won't tell you: not all PFAS are equally easy to remove.

"Long-chain" PFAS like PFOA and PFOS (the most studied and regulated) have longer molecular chains that make them easier for carbon-based filters to capture through adsorption. They're larger molecules that stick more readily to filter media.

"Short-chain" PFAS like PFBS and PFBA are smaller, more mobile, and harder to trap. Standard activated carbon filters can struggle with these — removal rates for short-chain compounds often drop to 30-55% in studies, compared to 73-89% for long-chain.

This is why filter quality and contact time matter. Gravity filters have an inherent advantage here: the slow flow rate means water spends more time in contact with the filter media, giving it more opportunity to capture even smaller PFAS molecules. A quick-pour pitcher filter simply can't match that contact time.

3 Steps to Protect Your Household Right Now

You don't need to wait for your municipal water system to meet the 2031 deadline. Here's what you can do today:

Step 1: Check Your Water

Look up your ZIP code on the EWG PFAS contamination map. If your water system has reported PFAS detections, you know the problem is real and local. Even if your system isn't listed, the USGS data suggests there's roughly a 1 in 2 chance your tap water contains some level of PFAS.

Step 2: Filter at the Point of Use

A Berkey system with Phoenix elements gives you household-level PFAS protection without depending on your water utility's timeline. No plumber. No electricity. Set it on your counter and start filtering.

Step 3: Reduce Exposure Beyond Water

Water is the biggest controllable source of PFAS exposure, but it's not the only one. Consider phasing out non-stick cookware in favor of cast iron or stainless steel. Check personal care products for PFAS ingredients (look for "fluoro" compounds on labels). Avoid stain-resistant treatments on furniture and carpets when possible.

Frequently Asked Questions

Does boiling water remove PFAS?

No. Boiling water does not remove PFAS — it actually concentrates them. As water evaporates, the PFAS remain behind at higher concentrations. You need a filter specifically designed to adsorb or reject PFAS molecules.

How do I know if my water has PFAS?

Check the EWG contamination map for known detection sites near you. For a definitive answer, you can order a certified PFAS water test from a lab — typical cost runs $200-400 for a comprehensive panel. Your annual water quality report (Consumer Confidence Report) from your utility may also list PFAS results if your system has been tested under UCMR5.

Do Phoenix filters remove all 14,000+ types of PFAS?

Phoenix elements have been independently tested against 5 specific PFAS compounds (PFOA, PFOS, PFHxS, PFNA, PFDA) with 99.8%+ reduction across all five. While they haven't been tested against all 14,000+ known PFAS variants — no filter on the market has — the tested compounds represent the most common and most regulated PFAS in drinking water.

How often do I need to replace the filters?

Phoenix gravity filter elements are rated for approximately 1,500 liters (roughly 396 gallons) per element. For a household of four, that typically means replacing elements every 6-12 months depending on daily water consumption. For full details on filter lifespan and maintenance, see our filter replacement guide.

Is PFAS contamination getting better or worse?

Detection is increasing because testing is expanding. The EPA's UCMR5 program tested roughly 95% of community water systems between 2023 and 2025 — far more comprehensive than any previous monitoring effort. As of March 2026, the data shows 9,728 contaminated sites. The final UCMR5 data release is expected in fall 2026 and will likely add more.

The Bottom Line

PFAS contamination isn't a future risk — it's a current reality affecting the drinking water of an estimated 176 million Americans. The EPA has set the strictest drinking water standards ever for PFOA and PFOS, but municipal compliance won't happen until 2031.

In the meantime, point-of-use filtration is the most practical way to protect your household. Phoenix gravity filter elements reduce tested PFAS compounds by up to 99.8%+, require no electricity or plumbing, and maintain that performance throughout their rated lifespan.

Browse our full selection of Berkey Water Filters to find the right system for your household, or check out our sizing guide if you're not sure which model fits your needs.