Does ZeroWater remove lead?

Last reviewed July 2026.

Yes — and it's certified, not just claimed. Every ZeroWater filter we track holds NSF/ANSI 53, the health-effects standard where lead lives, from an accredited certifier. That means the lead claim is in a public listing you can check — not just on the box.

Model by model

ZR-002: System certified by IAPMO R&T to NSF/ANSI 42 (chlorine) and 53 (lead, hexavalent chromium, PFOA/PFOS, mercury). Not in the NSF listing database — IAPMO is a separate accredited certifier.

What the certified claim costs to run

Certification is per model, and so is the running cost. The cheapest ZeroWater model carrying the claim is the 5-Stage Replacement Filter (2-pack) (ZR-002) at about $18.50 per filter for a certified 15 gallons — $1.233 per certified gallon.

That capacity is what the certifier tested to, not a marketing estimate. For one person drinking about half a gallon a day it is roughly about 4 weeks per filter; for a family of four, closer to 8 days. Run past the rated capacity and the claim no longer applies — the media is exhausted even though the filter still passes water.

How to check this yourself

Nothing here needs to be taken on trust. ZeroWater's certifications are held by IAPMO, and each keeps a public database you can search by brand or model number. Look up the model printed on the filter — not the box, not the retail listing — and read which standards the entry lists. A model certified to 42 only will say exactly that.

Direct listings: ZR-002

If a figure on this page disagrees with the certifier's listing, the listing wins. Tell us and we will correct it.

Why 53 is the number that matters

NSF/ANSI 42 is aesthetics — chlorine, taste, odour. 53 is health effects, and it is where the lead claim lives. A filter can be honestly "NSF certified" and still filter nothing but taste — see 42 vs 53 vs 401.

Related: Is ZeroWater NSF certified? · every filter we track, ranked by cost per certified gallon

We do not test filters — we index what accredited certifiers publish, with attribution, and make no health or treatment claims. A certification covers a specific model against a specific standard; it is not a general seal of quality. We are not affiliated with NSF International.