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What Filter Removes

Which water filters remove iron?

None of the 96 current water filters we track has a certifier listing for iron reduction. 2 more claim it from brand-run lab tests only, which is not certification.

The EPA secondary for iron in public drinking water is 0.3 mg/L.

Source note

Secondary standard. Manganese secondary 0.05 mg/L. epa.gov

Certified to reduce iron (0)

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

No filter we track has a certifier listing for iron.

Brand tests only, not certified (2)

These brands cite a lab report for iron, 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 iron claim (94 filters)

Common questions

Which water filters remove iron?

None of the 96 current water filters we track has a certifier listing for iron reduction. 2 more claim it from brand-run lab tests only, which is not certification.

Is there a legal limit for iron in tap water?

The EPA secondary for iron in public drinking water is 0.3 mg/L. MDH lists oxidizing media filtration, softening, aeration/filtration among options.

How do I know a filter really removes iron?

Look it up in the certifier's public database (NSF, WQA, IAPMO or CSA) under the exact model, and check that iron is in its list of reduction claims (usually under NSF/ANSI 42). "Tested to NSF standards" in an ad is not the same as a listing.