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What Filter Removes

Which water filters remove arsenic?

8 of the 96 water filters we track are certified to reduce arsenic (NSF/ANSI 53 and NSF/ANSI 58 listings). The lowest-priced is the AquaTru Carafe (countertop reverse osmosis, $375). Counting a year of replacement filters, the cheapest to own is the Brondell Circle RC100 ($664 the first year). 21 more claim it from brand-run lab tests only, which is not certification.

The EPA legal limit (MCL) for arsenic in public drinking water is 0.01 mg/L.

Source note

MCL 0.010 mg/L (10 ppb) effective 01/23/06; MCLG 0. epa.gov

Lowest-priced certified filter, by type

Countertop reverse osmosis

AquaTru Carafe

$375 to buy · NSF/ANSI 58

Check price at AquaTru →

Under-sink filter

Multipure Aquaperform

$765 to buy · $51/yr for 2 · NSF/ANSI 53

Check price at Multipure →

Under-sink reverse osmosis

Brondell Circle RC100

$450 to buy · $214/yr for 2 · NSF/ANSI 58

Check price at Brondell →

Certified to reduce arsenic (8)

Each row is a certifier listing for this exact product with arsenic in its reduction claims; the listing is linked. Yearly cost is replacement filters (plus drain water for RO) for 2 people, from each brand's filter prices and ratings.

FilterTypeListingPriceFilters a year
AquaTru Carafe Countertop reverse osmosis IAPMO R&T, NSF/ANSI 58 $375 — Check price at AquaTru
Brondell Circle RC100 Under-sink reverse osmosis WQA, NSF/ANSI 58 $450 $214 Check price at Brondell
AquaTru Classic Countertop reverse osmosis IAPMO R&T, NSF/ANSI 58 $475 — Check price on Amazon
Aquasana SmartFlow RO Under-sink reverse osmosis WQA, NSF/ANSI 58 $480 $321 Check price on Amazon
Multipure Aquaperform Under-sink filter NSF, NSF/ANSI 53 $765 $51 Check price at Multipure
Multipure Aquapremier Under-sink filter NSF, NSF/ANSI 53 $965 $108 Check price at Multipure
Multipure Aqualuxe Under-sink filter NSF, NSF/ANSI 53 $1,325 $74 Check price at Multipure
A. O. Smith RO with Microbial Boost AO-US-RO-MB-4000 Under-sink reverse osmosis IAPMO R&T, NSF/ANSI 58 — $270 Check price at A. O. Smith

Brand tests only, not certified (21)

These brands cite a lab report for arsenic, but no certifier lists the claim for the product. A lab report can be real; it is not an independent, ongoing certification with factory audits.

No arsenic claim (67 filters)

Common questions

Which water filters remove arsenic?

8 of the 96 water filters we track are certified to reduce arsenic (NSF/ANSI 53 and NSF/ANSI 58 listings). The lowest-priced is the AquaTru Carafe (countertop reverse osmosis, $375). Counting a year of replacement filters, the cheapest to own is the Brondell Circle RC100 ($664 the first year). 21 more claim it from brand-run lab tests only, which is not certification.

Is there a legal limit for arsenic in tap water?

The EPA legal limit (MCL) for arsenic in public drinking water is 0.01 mg/L. Claims are for pentavalent arsenic (As V). MDH: pre-oxidation may be needed to convert As(III); recommends a professional for arsenic treatment.

How do I know a filter really removes arsenic?

Look it up in the certifier's public database (NSF, WQA, IAPMO or CSA) under the exact model, and check that arsenic is in its list of reduction claims (usually under NSF/ANSI 53 or 58). "Tested to NSF standards" in an ad is not the same as a listing.