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What Filter Removes

Certifier listings, not marketing

Does your water filter really remove it?

We check 96 popular US water filters against certifier listings (NSF, WQA, IAPMO, CSA) for 18 contaminants, and compute what each costs a household to run. 44% of the reduction claims we found rest on brand lab tests alone, with no certifier listing.

Check your filter

Not listed? Look it up in the NSF listings, or enter its filter price and life for running cost.

Pick what you want out of your water

PFAS

29 certified filters →

Lead

39 certified filters →

Chloramine

19 certified filters →

Fluoride

7 certified filters →

Microplastics

28 certified filters →

Arsenic

8 certified filters →

All 18 contaminants →

Lowest first-year cost, by need

A. O. Smith AO-US-200 2-Stage Under Sink

PFAS

A. O. Smith AO-US-200 2-Stage Under Sink

$308 first year for 2
Brita Denali 6-cup pitcher (Elite filter)

Lead

Brita Denali 6-cup pitcher (Elite filter)

$76 first year for 2
APEC ROES-50

Reverse osmosis

APEC ROES-50

$331 first year for 2
Brita Denali 6-cup pitcher (Original filter)

Pitchers

Brita Denali 6-cup pitcher (Original filter)

$71 first year for 2

Calculator

What will a filter cost your household?

Replacement filters, reverse-osmosis drain water and cost per gallon, for your family size.

Our data

Certified vs. "tested to NSF standards"

44% of the claims we checked have no certifier listing. See which ones.

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