Clark's Review, Is Clark's Non-Toxic?
Clark's averages 65 out of 100 on PFAS Authority's PFAS and toxin screen across the single Clark's product graded as of October 2026, which does not reach its 70 point pass mark.
Clark's grades Good on our four-band scale. On disclosure, the brand says nothing publicly about PFAS. See what every brand has published about PFAS for how that compares.
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.
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Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
Which Clark's products contain PFAS? Poor and Bad, we’d swap these
- Vegetable oil seasoning, no coating applied
- We found no PFAS statement from the brand
- Oxidative degradation and rancidity. Vegetable oils are prone to oxidation during storage or at high heat…
3 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonClark's and PFAS, common questions
- Does Clark's have PFAS?
- Clark's averages 65 out of 100 on PFAS Authority's PFAS and toxin screen across the single Clark's product graded as of October 2026, which does not reach its 70 point pass mark. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Clark's non-toxic?
- No Clark's product we graded reaches Good. The best of them is Clarks Cast Iron Seasoning Oil at 65/100.
- Which Clark's products should I avoid?
- The lowest-graded Clark's products we have scored are Clarks Cast Iron Seasoning Oil. Each one links to the evidence behind its grade.
Every grade uses the same public rubric. How grades work →