Is your under-sink filter really NSF-certified?

We checked 13 under-sink and RO systems against NSF's public certification database. Every claim links to the NSF listing. No reviews, no hype, and no health advice.

Certification table · Find by contaminant · Yearly filter cost · How we verify

Popular contaminants

• Lead
• PFAS (PFOA & PFOS)
• Chlorine
• Chloramine
• VOCs
• Cysts (Cryptosporidium, Giardia)
• Fluoride
• Arsenic (pentavalent)

Standards explained

• NSF/ANSI 42: Aesthetic effects: chlorine, taste and odor, particulates
• NSF/ANSI 53: Health effects: e.g. lead, cysts, VOCs, PFOA/PFOS
• NSF/ANSI 58: Reverse osmosis systems: TDS plus optional health claims
• NSF/ANSI 401: Emerging compounds / incidental contaminants
• NSF P473: PFOA/PFOS protocol (now largely folded into NSF/ANSI 53)

Comparisons

• Multipure Aquaversa vs Multipure Aqualuxe
• Multipure Aquaperform vs Multipure Aquapremier
• Multipure Aquaversa vs Everpure H-1200
• Everpure H-1200 vs Everpure H-300
• iSpring RCC7AK-BN vs Express Water RO5DX
• iSpring RCC7AK-BN vs A.O. Smith AORO-50
• iSpring RO500AK-BN (tankless) vs Express Water RO10DX
• Pentair GRO-575B vs iSpring RCC7AK-BN
• A.O. Smith AORO-50 vs Express Water RO5DX
• Multipure Aqualuxe vs iSpring RCC7AK-BN
• Everpure H-104 vs Multipure Aquaversa
• Express Water RO5DX vs Express Water RO10DX