The right water filter for your home — in 60 seconds.
Answer a few questions and get the correct system, the right size, and the honest call on whether you even need whole-houseTreatment installed where water enters the home, so every tap is covered. Best for aesthetic issues like chlorine; rarely necessary for ingestion-only contaminants.Learn more →. Free, no email.
Every certification we cite is one you can look up.
We write “certified” only when the finished product appears in one of these three public databases — under its own model number, for that specific contaminant.
Writes the standards and certifies products against them. 53 covers health claims like lead, 58 covers reverse osmosis, P473 covers PFOA and PFOS.
Search NSF listings →An accredited certifier that lists finished products against those same NSF/ANSI standards. An IAPMO listing carries equal weight to an NSF one.
Search the IAPMO directory →Certifies to the same standards under its Gold Seal program, backed by annual audits of the manufacturing plant.
Search WQA Gold Seal →A certified component, a certified filter media, and a manufacturer's own lab report are not the same thing as a certified finished product — and the difference is usually where the marketing lives. Where a product has only those, we say so plainly and describe what it actually does. Certified vs. tested →
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Tell us your source and what's in your water. No test yet? Start with one — the link's in the form and up top.
Know before you buy.
Everything behind your recommendation — what might be in your water, and how to tell a genuine certification“Certified” means an independent body (NSF, IAPMO, or WQA) verified the finished product against a published standard. “Tested” often just means the brand ran its own lab check — not the same thing.Learn more → from marketing. Filter by what you need, or explore it all.
Before you start.
Is this really free?
Yes — 100% free, no email. We may earn a commission from retailer links, but it never changes the recommendation. When a cheaper point-of-use filter is right, the tool says so and stops.
Do I need whole-house for PFAS or lead?
Usually not. Those harm you when you drink them, so a certified under-sink filter at the tap is the correct, cheaper fix. There's no whole-house system certified to remove lead.
What does “certified” mean here?
We show “certified to reduce” a contaminant only when a product has a verified finished-product listing in the NSF, IAPMO, or WQA database. Otherwise we describe it factually.
Should I test my water first?
Yes. PFAS“Forever chemicals” — synthetic compounds linked to health harm. Certified reduction today generally covers PFOA and PFOS specifically.Learn more →, lead, nitrate and arsenic are odorless, colorless and tasteless — a lab test is the only way to know what to treat.
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