Berkey Review, Is Berkey Non-Toxic?
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.
Across 1 graded product, Berkey averages Excellent (100/100). 1 of its products grade Good or better. Grades are model-based estimates, not lab results.
Worth buying from Berkey Good or better, safest first
Berkey
Gravity Filter
Bacterial growth from stagnation and inadequate maintenance
Gravity filters with standing water are prone to microbial colonization if cartridges are…
Housing and gasket material leachability
The composition and safety testing of Berkey's housing, seals, and fasteners are not…
Bypass due to housing integrity loss
If housing seals crack or weaken, unfiltered water can bypass the cartridges entirely.…
Low PFAS risk from gravity-based filtration design.
✓Brand claims PFAS-free (unverified)
Every grade uses the same public rubric. How grades work →