Is Waterdrop NSF certified?

Last reviewed July 2026.

Yes — but only some models. Waterdrop filters appear in the public certified listings (NSF), yet the certification is per model, and the models differ on the one thing most buyers care about: lead. Some Waterdrop filters hold NSF/ANSI 53 (health effects, which is where lead lives). Others are certified only to NSF/ANSI 42 — chlorine, taste and odour. Both are honestly "certified". Only one filters lead.

What the listing actually says

WDS-F27: NSF-listed under Qingdao Ecopure Filter Co. to NSF/ANSI 53 (health effects, incl. lead) at a rated capacity of 300 gallons, plus 42. Aftermarket, and genuinely certified — Waterdrop holds hundreds of NSF listings. Retail listings also cite NSF/ANSI 372, which is a lead-free MATERIALS standard (the plastic doesn't leach lead) and is NOT a filtration claim — we exclude it from the standards column.

WDP-F27: The 'Plus' (WDP) line adds NSF/ANSI 401 — PFAS and pharmaceuticals — on top of 42 and 53. NSF-listed at 300 gallons, same as the standard WDS line. Same brand, same fridge, one extra standard: the Plus/Standard split is Waterdrop's version of Brita's Elite/Standard split, and it is easy to buy the wrong one.

WDP-UKF8001: NSF-listed under Qingdao Ecopure Filter Co. as EFF-6007S / WDP-UKF8001, rated 300 gallons, with NSF/ANSI 53 reduction claims for lead, cyst, benzene, mercury, carbofuran and endrin — plus 42 and 401 (PFOA/PFOS). Replaces Whirlpool everydrop Filter 4 / Maytag UKF8001.

WD-F38: Sold as 'NSF 42 and 372 certified' — which sounds comprehensive and is not. NSF/ANSI 42 is chlorine, taste and odour; NSF/ANSI 372 only certifies that the housing MATERIAL is lead-free, and is not a filtration claim at all. There is no NSF/ANSI 53 listing, so this filter carries NO certified lead claim — while the everydrop EDR1RXD1 it replaces holds 42, 53 AND 401. Swapping to it to save money silently gives up your lead certification.

What those standard numbers mean

• NSF/ANSI 42 — aesthetic effects (chlorine, taste and odour). Not a health claim.
• NSF/ANSI 53 — health effects. This is the standard that covers lead.
• NSF/ANSI 401 — emerging contaminants: PFOA/PFOS, pharmaceuticals, microplastics.

Verify it yourself: every Waterdrop row above links the certifier's own listing. If a number here disagrees with the listing, the listing wins — tell us and we'll fix it.

What the certified claim costs to run

Certification is per model, and so is the running cost. The cheapest Waterdrop model carrying the claim is the WDS-F27 — Samsung DA29-00020B replacement (4-pack) (WDS-F27) at about $9.00 per filter for a certified 300 gallons — $0.030 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 20 months per filter; for a family of four, closer to 5 months. Run past the rated capacity and the claim no longer applies — the media is exhausted even though the filter still passes water.

Within the same brand the spread is real: the Plus WDP-UKF8001 — everydrop Filter 4 / EDR4RXD1 replacement works out at $0.117 per certified gallon, 3.9× the cheapest. Same claim, different money.

See how Waterdrop ranks on cost per certified gallon against every filter we track →

Related: Does Waterdrop remove lead? · Does Waterdrop remove PFAS?

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.