Honest water-filter guidance

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.

Get my recommendation Test your water first
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NSF·IAPMOVerified picks only
HonestWe say when cheaper's right
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The selector

Build your recommendation

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.

What type of water source do you have?
What's in your water?

From a lab test — the accurate path. No test yet? Leave blank and we'll tell you what to check.

Haven't tested yet — notice any of these signs?

Hints only — these can't reveal PFAS, lead, nitrate, or arsenic. We'll still steer you to a test.

Tell us about your home
What matters most to you? optional

Step 1 of 5

No test yet? Get your test here →

The learning hub

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.

PbLeadNo known safe level; from old pipes & fixtures. ∞PFAS“Forever chemicals” — reduced at the tap. AsArsenicNatural, odorless; reverse osmosis reduces it. NNitrateFarm-country wells; carbon can't remove it. ≈VOCsIndustrial/fuel chemicals; carbon & RO. ✛BacteriaA well disinfection job — handled by UV. ✓Certified vs. testedThe single distinction that matters most. 42NSF/ANSI standardsWhat 42, 53, 58 & 401 each cover. ⌂POU vs. whole-houseWhere treatment belongs, by route. ○Reverse osmosisHow RO works — and what it can't do. ▢Sizing (GPM)Keep your water pressure up. →Where treatment belongsWhole-house vs. under-sink for PFAS & lead. ≋Softener or filter?They solve different problems. ◔PFAS in well waterUnder-sink is usually the certified fix. ▥Sizing by bathroomsWhat size for a 3-, 4-, or 5-bath home. ✓Test your water firstWhat to test for, and why senses can't tell.
Explore the learning hub →
Common questions

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.

Know exactly what your water needs.

The right system, the right size, and the honest answer — in about a minute.

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