Do Big Berkey water filters have PFAS?
Big Berkey water filters average 98 out of 100 on PFAS Authority's PFAS and toxin screen across the 8 Big Berkey water filters graded as of October 2026, above the 95 out of 100 median for the 63 other water filters brands graded alongside it.
Big Berkey water filters average Excellent on our four-band scale. 8 of the 8 we graded are worth buying.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Big Berkey water filters worth buying Good or better, best-graded first
Big Berkey
Empty Housing with NO Filters Included
- Stainless steel housing and spigot
- We found no PFAS statement from the brand
- Bacterial growth and biofilm if filters not replaced, Any gravity-fed water filter risks harboring bacteria…
5 hazards checked on this product. See all of them.
Big Berkey
Berkey Big Water Filter System
- Activated carbon and resin filter elements, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial growth / biofilm in filter housing, Any gravity-fed pitcher system can harbor bacteria if the…
3 hazards checked on this product. See all of them.
Big Berkey
Water Filter System
- Stainless steel housing, activated carbon and mineral filters
- We found no PFAS statement from the brand
- Bacterial growth in lower chamber, Gravity-fed systems with standing water in the lower collection chamber…
3 hazards checked on this product. See all of them.
Big Berkey
Royal Berkey Water Filter System
- Stainless steel housing; activated carbon and mineral-based filter media
- We found no PFAS statement from the brand
- Bacterial growth in filter media if maintenance neglected, Activated carbon can harbor bacterial biofilm if…
3 hazards checked on this product. See all of them.
Big Berkey
Berkey BK4x2-CF Big Berkey Water Filter System
- Stainless steel canister; activated carbon + ceramic filters
- We found no PFAS statement from the brand
- Bacterial growth in filter cartridges and housing, Gravity filters with standing water can harbor biofilm if…
3 hazards checked on this product. See all of them.
Big Berkey
Stainless Steel Spigot Bundle
- Stainless steel spigot/valve
- We found no PFAS statement from the brand
- Bacterial biofilm and growth in valve cavity, Stainless steel spigots can harbor bacteria and mold in…
2 hazards checked on this product. See all of them.
Big Berkey
Water Filter
- Stainless steel, ceramic/carbon/mineral filters, glass
- We found no PFAS statement from the brand
- Bacterial growth in standing water (filter maintenance gap), Gravity filters rely on user discipline to…
4 hazards checked on this product. See all of them.
Big Berkey
Gravity-Fed Stainless Steel Countertop Water Filter System 2.25 Gallon with 2 Authentic Black Berkey Elements BB9-2 Filters
- stainless steel body; activated carbon/specialty media filter elements (composition unspecified)
- We found no PFAS statement from the brand
- Bacterial growth in filter media if maintenance intervals are missed, Gravity filters with activated carbon…
3 hazards checked on this product. See all of them.
Better water filters from other brands
Graded higher than the Big Berkey average of 98.
Aquamira
Water Storage Treatment 2 oz Glass Bottles 60 gallons Purification
- glass bottles, sodium dichloroisocyanurate treatment chemical
- We found no PFAS statement from the brand
- Chemical overdose or misuse
5 hazards checked on this product. See all of them.
LifeStraw
Home Glass Water Filter Pitcher
- Borosilicate glass pitcher, replaceable activated-carbon filter cartridge
- Bacterial growth in filter cartridge if unmaintained
5 hazards checked on this product. See all of them.
Brita
20 oz Carbon Stainless Steel Filtered Water Bottle
- Stainless steel bottle with activated carbon filter cartridge
- Bacterial/microorganism growth in filter cartridge
2 hazards checked on this product. See all of them.
The same question, asked of the other water filters brands
Best average grade first. Big Berkey averages 98.
See every Big Berkey product we grade on the Big Berkey brand page, or the full water filters ranking.