Water Filters, ranked by PFAS grade

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Top-graded picks in the categories readers replace first, every one scored on the same rubric.

Aqua Pure

3M Aqua-Pure AP802B Whole House Filter Housing

95ExcellentPFAS grade

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. See all of them.

Full breakdown Buy

Aquasure

Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System

100ExcellentPFAS grade

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. See all of them.

Full breakdown Buy

Avocado

Vegan Mattress

100ExcellentPFAS grade

✓ MADE SAFE Certified✓ Global Organic Textile Standard (GOTS)

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. See all of them.

Full breakdown Buy

What we found October 2026

420 of the 421 water filters PFAS Authority has graded reach its 70 point pass mark for PFAS and other toxins, 99.8% of the category, as of October 2026, and 1 scores below it. The highest graded is Aquamira Water Storage Treatment 2 oz Glass Bottles 60 gallons Purification at 100 out of 100.

The full ranking is below, best-graded first, with every score linking to the evidence behind it.

Are water filters safe?

420 of the 421 water filters we graded come back low-concern on our screen and 1 do not. Our grades are model-based assessments built from published materials, ingredient lists, certifications and brand disclosures, not laboratory tests, so they say what we can evidence rather than that anything is safe.

Best graded water filters here

1Aquamira Water Storage Treatment 2 oz Glass Bottles 60 gallons Purification 100 out of 100
2Big Berkey Empty Housing with NO Filters Included 100 out of 100
3LifeStraw Home Glass Water Filter Pitcher 100 out of 100

By materialCeramic Stainless Steel Glass Pitcher

Start here

The best non-toxic water filters, ranked by grade

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Buyer’s guide

What to look for in water filters, and which brands grade best and worst

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Bad · Better · Best

Water Filters, ranked.

The quickest read, what to skip and the top-graded picks worth buying instead.

Avoid60Good

Filtered Water Bottle with Nanofiber Fast Flow Filter Media

60/100 safety

Skip until the brand discloses nanofiber makeup, PFAS risk remains unclear.

Why avoid it

Better95Excellent

Berkey

Gravity Filter

95/100 safety

No coating of concern recorded, and no PFAS statement from the brand.

Details Check price

Best pick100Excellent

Aquamira

Water Storage Treatment 2 oz Glass Bottles 60 gallons Purification

100/100 safety

Glass bottles and treatment chemical show no PFAS linkage on record.

Details Check best price

Why Aquamira Water Storage Treatment wins, and what it beats

Every grade on this page is one sum. A category starts from a baseline, each disclosed material or coating adds risk points, and each thing the brand or a third party has published takes them away. Below is that sum for the winner, then for 3 products it beats, so you can see exactly where the 40 points between the top and the bottom of this water filters ranking come from.

The winner

100Excellent

Aquamira Water Storage Treatment 2 oz Glass Bottles 60 gallons Purification

Made of glass bottles, sodium dichloroisocyanurate treatment chemical.

+15No PFAS disclosure. No public statement from the brand about PFAS in this product.
-20Bare uncoated material. Recorded as a bare, uncoated material with no surface coating or treatment.

What the grade does not fix. It still carries one risk factor, No PFAS disclosure, and our graders recorded 5 other hazards on it. See the full breakdown.

Check price Full breakdown

What it beats, and why

95Excellent5 points behind the winner

Berkey Gravity Filter

What puts it behind. The winner earns -20 points for Bare uncoated material. We found nothing comparable published for this product.

+15No PFAS disclosure
-10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.

5risk points, a grade of 95

95Excellent5 points behind the winner

Brita Standard Filter

What puts it behind. Vague safety claims only, +15 points. Uses vague language ("eco-friendly", "clean") without a specific PFAS statement. The winner carries no such factor.

+15Vague safety claims only
-10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.

5risk points, a grade of 95

60Good40 points behind the winner

Filtered Water Bottle with Nanofiber Fast Flow Filter Media

What puts it behind. Unknown / proprietary coating, +25 points. A coating is recorded with no disclosed chemistry. The winner carries no such factor.

Made of Nanofiber filter media (composition unspecified).

+25Unknown / proprietary coating
+15No PFAS disclosure

40risk points, a grade of 60

No product on this page was physically tested by us. Every number above comes from published materials, ingredient and coating disclosures, certifications and brand statements, scored on one public rubric. Formulations change without notice, so check the current product listing before buying.