Do S'well water filters have PFAS?
S'well water filters average 98 out of 100 on PFAS Authority's PFAS and toxin screen across the 11 S'well water filters graded as of October 2026, above the 95 out of 100 median for the 65 other water filters brands graded alongside it.
S'well water filters average Excellent on our four-band scale. 11 of the 11 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.
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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.
What S'well says and does about PFAS
S’well publishes nothing about PFAS. Its only materials and safety answer covers stainless steel, BPA and California Proposition 65 compliance, and a search of its own site returns product listings rather than any PFAS statement. Where it does name a gasket material it names silicone, on its glass bottle line. No Proposition 65 notice has been filed against the brand and we found no independent testing of its drinkware.
- Brand statementS’well says its products are made of 18/8 food-grade stainless steel that does not need a liner, that they are BPA-free, and that they comply with California Proposition 65 and FDA food contact rules. The answer does not mention PFAS or any coating chemistry. S’well ↗
- MaterialsOn its glass bottle line S’well names the lid gasket as silicone, which is not a fluorinated polymer. It does not state the gasket material for its insulated drinkware. S’well ↗
Sources checked October 1, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.
S'well water filters worth buying Good or better, best-graded first
- Double-wall 18/8 stainless steel
- Bacterial or mold growth. The insulation air gap in double-wall bottles is not accessible for cleaning. If…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel vacuum-insulated walls; BPA-free plastic lid
- Plastic lid material unspecified, S'well does not publicly name the resin or additives in the BPA-free lid.…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel double-wall vacuum insulation; BPA-free plastic flip-straw cap
- Cap plastic composition and leaching. The flip-straw cap material is not disclosed by S'well despite BPA-free…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle with polypropylene lid and flip straw
- Polypropylene lid degradation. Prolonged exposure to hot beverages or UV light can cause PP to soften…
2 hazards checked on this product, all on its full breakdown.
- Double-wall stainless steel (18/8)
- Lid gasket and seal degradation. Rubber seals in the cap can accumulate mold or crack over time if not dried…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel exterior, internal water filter (carbon/ion-exchange)
- BPA & bisphenols, S'well does not disclose whether filter housings, binders, or ion-exchange resin coatings…
4 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle with food-grade plastic cap
- Microplastic shedding from heated plastic. Polypropylene caps can degrade under sustained high heat (above…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel body with plastic lid
- Plastic lid degradation and silicone gasket wear. Polypropylene lids and silicone gaskets are durable but…
3 hazards checked on this product, all on its full breakdown.
- stainless steel with proprietary insulation layer
- Insulation layer chemical composition (unknown). The proprietary insulation material is not disclosed; it may…
3 hazards checked on this product, all on its full breakdown.
- Double-wall stainless steel (primary container material)
- Silicone/plastic gasket degradation. Lid gaskets and cap seals are typically food-grade silicone but S'well…
2 hazards checked on this product, all on its full breakdown.
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- Stainless steel with plastic cap/lid components
- BPA & bisphenols, S'well does not disclose the polymer type or chemical composition of cap and lid…
3 hazards checked on this product, all on its full breakdown.
Better water filters from other brands
Graded higher than the S'well average of 98.
- 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.
The same question, asked of the other water filters brands
Best average grade first. S'well averages 98.
See every S'well product we grade on the S'well brand page, or the full water filters ranking.