Do Kirkland water filters have PFAS?
Kirkland water filters average 95 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 Kirkland water filters graded as of October 2026, level with the 95 out of 100 median for the 64 other water filters brands graded alongside it.
Kirkland water filters average Excellent on our four-band scale. 4 of the 4 we graded are worth buying. That is above 36% of the water filters brands we grade.
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.
Kirkland water filters worth buying Good or better, best-graded first
- BPA-free plastic pitcher with activated carbon filter
- We found no PFAS statement from the brand
- Bacterial growth in filter media. Activated carbon filters can harbor bacteria if cartridge is not replaced…
- BPA-free plastic pitcher, activated carbon/ion-exchange filter cartridge
- We found no PFAS statement from the brand
- Bacterial growth in filter cartridge if unmaintained. Spent activated carbon can harbor bacteria if filters…
3 hazards checked on this product, all on its full breakdown.
- Plastic pitcher body, carbon and ion exchange filter media
- We found no PFAS statement from the brand
- Bacterial growth or biofilm in pitcher housing. If filters are not replaced on schedule or the pitcher is not…
4 hazards checked on this product, all on its full breakdown.
- Plastic pitcher body, likely polypropylene or BPA-free plastic; carbon or ion exchange filter media
- We found no PFAS statement from the brand
- Bacterial growth in filter media and reservoir. Gravity-fed pitchers with spent or poorly maintained filters…
3 hazards checked on this product, all on its full breakdown.
Better water filters from other brands
Graded higher than the Kirkland average of 95.
- 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. Kirkland averages 95.
See every Kirkland product we grade on the Kirkland brand page, or the full water filters ranking.