Berkey Gravity Filter
No coating of concern recorded, and no PFAS statement from the brand.
The brand has published no PFAS statement for this product that we could find.
We flunk more products than we pass. This one earned its grade. How we grade
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Berkey Gravity Filter is made of, ingredients and materials
The Berkey Gravity Filter uses a proprietary black filtration element (exact composition not disclosed by the brand) housed in food-grade stainless steel or plastic chambers. The filter media is claimed to remove bacteria, protozoa, and some chemicals through microfiltration and adsorption, but the brand does not publish material safety data sheets or detailed composition. Without transparency on the filter element's resin type or any binding agents, independent verification of potential leachables during normal use is limited.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Bacterial growth if unmaintained
Gravity filters rely on user discipline; if the unit sits unused for weeks or the lower chamber is not cleaned regularly, bacteria can colonize the stagnant water and the filter element itself, negating filtration benefit. No self-sterilizing mechanism is documented.
Housing leachables (if plastic)
Berkey offers both stainless steel and plastic housing options, but does not specify plastic type (polycarbonate, polypropylene, etc.) or confirm absence of BPA or other estrogenic compounds. Stainless steel housing eliminates this concern.
Filter element composition and leaching
The black filtration media composition is proprietary and undisclosed. Independent lab testing by third parties has raised questions about whether activated carbon and other media are food-grade or suitable for food contact; unknown resin binders could potentially leach under conditions of extended use or temperature fluctuation.
Unverified contaminant removal claims
Berkey makes broad claims about virus, bacteria, and chemical removal without EPA or NSF certification backing those claims. Users may rely on the filter for contaminant reduction beyond what it actually achieves, creating a false sense of water safety.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Filter replacement and disposal
No documented hazard in filter disposal; however, the brand does not provide clear guidance on whether spent elements can be composted or must go to landfill, and whether the media contains any heavy metal adsorbents that would pose disposal risk.
How is this PFAS grade calculated?
The brand's record and disclosure
Berkey has faced controversy over unsubstantiated health claims and lack of third-party certification; the company does not list EPA registration, NSF certification, or independent testing results on product pages. The brand maintains silence on PFAS, formaldehyde, or other chemical hazards in its filters. No major recalls related to filter contamination or housing degradation have been publicly documented, but the company's limited transparency on manufacturing standards is a significant gap.
How it compares in its category
Most certified gravity filters (Sawyer, LifeStraw) undergo NSF or EPA testing and disclose contaminant reduction claims. Berkey filters are cheaper and marketed as higher-capacity, but lack independent verification. Compared to pitcher filters (Brita, PUR) which change cartridges monthly, Berkey elements last longer but also require more vigilant maintenance to prevent bacterial regrowth in standing water.
If you buy it
Replace or clean filter elements every 12 months or if flow slows noticeably; stagnant water in the reservoir promotes bacterial growth if the filter is not used regularly. Store the unit away from direct sunlight and in a cool area to limit microbial proliferation. Empty and sanitize the lower chamber every 3-6 months. If housing is plastic, do not use water warmer than room temperature during filling, as heat can accelerate any material leaching.
What is not known about PFAS in this product?
- Basis
- Model estimate, 100% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Berkey has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Berkey Gravity Filter?
- glass bottles, sodium dichloroisocyanurate treatment chemical
- We found no PFAS statement from the brand
- Chemical overdose or misuse
5 hazards checked on this product, all on its full breakdown.
- Stainless steel housing and spigot
- We found no PFAS statement from the brand
- Bacterial growth and biofilm if filters not replaced
5 hazards checked on this product, all on its full breakdown.
- Borosilicate glass pitcher, replaceable activated-carbon filter cartridge
- Bacterial growth in filter cartridge if unmaintained
5 hazards checked on this product, all on its full breakdown.
More water filters grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.