Product intelligence database

Water Filter Products

Compare treatment format, current certification evidence, capacity, maintenance and limitations. Start with the water problem; use the product analysis to verify fit.

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22 matching products

As an Amazon Associate, PurityMap earns from qualifying purchases. Offers never change which products appear or their order.

Countertop System

AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)

AquaTru · AT2000Reverse Osmosis

3 verified certificationsNSF/ANSI 58NSF/ANSI 53NSF/ANSI 42

LeadFluorideArsenic VNitrate/nitritePerchlorateBarium+12 more

Rated capacity: Not published
Typical upkeep: $74/yr

A no-installation reverse-osmosis option for renters: certified for lead, fluoride, arsenic V and nitrate (NSF/ANSI 58) and PFOA/PFOS (NSF/ANSI 53).

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Countertop System

AquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100)

AquaTru · AT100Reverse Osmosis

3 verified certificationsNSF/ANSI 58NSF/ANSI 53NSF/ANSI 42

LeadFluorideArsenic VNitrate/nitritePerchlorateBarium+12 more

Rated capacity: Not published
Typical upkeep: $74/yr

A compact no-installation reverse-osmosis option: certified for lead, fluoride, arsenic V and nitrate (NSF/ANSI 58), PFOA/PFOS (NSF/ANSI 53) and chlorine/chloramine (NSF/ANSI 42).

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Countertop System

Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)

Aquasana · AQ-CWM2Activated Carbon (Claryum)

2 verified certificationsNSF/ANSI 53NSF/ANSI 42

PFOAPFOSLeadMercuryAsbestosMTBE+4 more

Rated capacity: Not published
Typical upkeep: $74/yr

A no-installation option for renters: certified for PFOA/PFOS and lead (NSF/ANSI 53) plus chlorine taste (NSF/ANSI 42).

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Faucet Attachment

PUR Plus Faucet Filter (FM2500V)

PUR · FM2500VActivated Carbon

2 verified certificationsNSF/ANSI 53NSF/ANSI 42

LeadMercuryVOC (chloroform surrogate)Chlorine taste/odorTotal PFAS (aggregate)

Rated capacity: 100 gal
Typical upkeep: $55/yr

Best for a cheap, no-tools way to reduce lead and chlorine at a single faucet.

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Refrigerator Filter

Whirlpool Filter 3 Refrigerator Water Filter (WHR3RXD1)

Whirlpool · WHR3RXD1Activated Carbon

3 verified certificationsNSF/ANSI 53NSF/ANSI 42NSF/ANSI 401

LeadPFOAPFOSTTHMMercuryMTBE+6 more

Rated capacity: Not published
Typical upkeep: $25/yr

If your Whirlpool or KitchenAid refrigerator takes Filter 3: certified to NSF/ANSI 53 for lead and PFOA/PFOS, plus NSF/ANSI 401 microplastics.

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Countertop System

Patriot Pure Ultimate Water Filtration System

Patriot Pure (4Patriots) · Ultimate Water Filtration SystemGravity pour-through (Nanomesh filter)

1 verified certificationNSF/ANSI 53

LeadMercuryCadmiumChromiumCopperSelenium+4 more

Rated capacity: 200 gal
Typical upkeep: $60/yr

An off-grid pour-through filter certified to NSF/ANSI 53 for lead, PFOA/PFOS and arsenic V.

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Water Pitcher

Culligan ZeroWater 10-Cup Pitcher (ZEROP10)

Culligan ZeroWater · ZEROP10Activated Carbon / Ion Exchange

2 verified certificationsNSF/ANSI 53NSF/ANSI 42

LeadCadmiumCopperMercuryFluorideHexavalent chromium+4 more

Rated capacity: 20 gal
Typical upkeep: $90/yr

A no-install pitcher certified to NSF/ANSI 53 for lead, Total PFAS, fluoride and nitrate/nitrite, plus chlorine taste (NSF/ANSI 42).

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Under-Sink Filter

Waterdrop G3P600 Tankless Reverse-Osmosis System

Waterdrop · WD-G3P600Reverse Osmosis

3 verified certificationsNSF/ANSI 58-2024NSF/ANSI 53NSF/ANSI 42

LeadFluorideBariumCadmiumRadium 226/228TDS+3 more

Rated capacity: Not published
Typical upkeep: $90/yr

Certified PFOA/PFOS (NSF/ANSI 53), lead and fluoride (NSF/ANSI 58) reduction at one kitchen tap, for less than the G3P800.

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Under-Sink Filter

Waterdrop G3P800 Tankless Reverse-Osmosis System

Waterdrop · WD-G3P800-WReverse Osmosis

3 verified certificationsNSF/ANSI 53NSF/ANSI 58-2024NSF/ANSI 42

PFOAPFOSLeadFluorideBariumCadmium+3 more

Rated capacity: 1,100 gal (NSF/ANSI 53 PFOA/PFOS rating, WD-G3-CB cartridge)
Typical upkeep: $160/yr

Certified PFOA/PFOS (NSF/ANSI 53), lead and fluoride (NSF/ANSI 58) reduction at one kitchen tap.

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Shower Filter

Jolie Filtered Showerhead

Jolie · Filtered ShowerheadKDF-55 / Activated Carbon

1 verified certificationNSF/ANSI 177

Free available chlorine

Rated capacity: Not published
Typical upkeep: $50/yr

For chlorinated (not chloraminated) water in the shower: certified to NSF/ANSI 177 for free chlorine.

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Under-Sink Filter

Frizzlife SP99 Under-Sink Filter

Frizzlife Technology Inc · SP99Activated Carbon Block

1 verified certificationNSF/ANSI 53-2024

LeadCyst

Rated capacity: 12,000 gal
Typical upkeep: $70/yr

Best when chlorine taste/odor or disinfection by-products are the concern at the kitchen tap, with lead reduction on certified models.

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Under-Sink Filter

Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200)

Aquasana · AQ-5200Activated Carbon (Claryum)

1 verified certificationNSF/ANSI 53

PFOAPFOSLeadMercuryAsbestosMTBE+2 more

Rated capacity: Not published
Typical upkeep: $80/yr

Certified PFOA/PFOS and lead reduction (NSF/ANSI 53) at a kitchen tap, at about half the price of the 3-stage model.

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Under-Sink Filter

Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M)

Aquasana · AQ-6300MActivated Carbon (Claryum)

2 verified certificationsNSF/ANSI 53NSF/ANSI 42

PFOAPFOSLeadMercuryAsbestosMTBE+4 more

Rated capacity: Not published
Typical upkeep: $80/yr

Certified PFOA/PFOS and lead reduction (NSF/ANSI 53) plus chlorine taste (NSF/ANSI 42) at a kitchen tap, for far less than reverse osmosis.

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Water Pitcher

Brita Elite Water Filter Pitcher

Brita · OB46/OB06Activated Carbon / Ion Exchange

2 verified certificationsNSF/ANSI 53NSF/ANSI 42

LeadMercuryBenzeneAsbestosChlorine taste/odor

Rated capacity: 120 gal
Typical upkeep: $45/yr

Best for a low-cost, no-install way to reduce lead and improve taste for drinking water.

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Whole-House System

Kenmore 420 Water Softener (40,000-grain)

Kenmore · 625.384200Ion Exchange

1 verified certificationNSF/ANSI 44

Hardness / scaleBariumRadium 226/228

Rated capacity: Not published
Typical upkeep: $120/yr

For whole-home hard water (scale): an NSF/ANSI 44 certified softener with verified hardness capacity.

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Whole-House System

GE GXSH35W Water Softener (35,000-grain)

GE Appliances · GXSH35WIon Exchange

1 verified certificationNSF/ANSI 44

Hardness / scaleBariumRadium 226/228

Rated capacity: Not published
Typical upkeep: $120/yr

For whole-home hard water (scale): an NSF/ANSI 44 certified softener with verified hardness reduction.

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Whole-House System

3M Aqua-Pure Whole-House Water Filter System (AP904)

3M Aqua-Pure (Solventum) · AP904Activated Carbon

1 verified certificationNSF/ANSI 42

Chlorine taste/odorParticulate

Rated capacity: 100,000 gal
Typical upkeep: $120/yr

Whole-home chlorine taste and odor: NSF/ANSI 42 certified, rated 100,000 gallons at 10 gpm. Chlorine only, not chloramine.

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Countertop System

Berkey PF-2 Fluoride & Arsenic Element (not certified)

Berkey · PF-2Activated Alumina

No verified certification

Rated capacity: 1,000 gal
Typical upkeep: $80/yr

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No current offer

Countertop System

Purewell K8626 Gravity Filter (not certified)

Purewell · K8626Gravity-Fed Activated Carbon

No verified certification

Rated capacity: 6,000 gal
Typical upkeep: $60/yr

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No current offer

Refrigerator Filter

Waterdrop INL Inline Refrigerator & Ice-Maker Filter

Waterdrop · WD-INLActivated Carbon

No verified certification

Rated capacity: 1,500 gal
Typical upkeep: $25/yr

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Water Pitcher

Clearly Filtered Pitcher (lab-tested, not NSF 53 certified)

Clearly Filtered · P-V3Activated Carbon Block

No verified certification

Rated capacity: Not published
Typical upkeep: $60/yr

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No current offer

Whole-House System

iSpring WGB32B Whole-House Carbon System (not certified)

Ispring Water Systems LLC. · WGB32BCatalytic Activated Carbon

No verified certification

Rated capacity: 1,000,000 gal
Typical upkeep: $150/yr

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No current offer

How this database works

Analysis first. Commerce second.

PurityMap checks each exact product against its evidence register: a target counts only when a current certification record covers it. Technology, capacity and limitations come from the product record. Retailer offers are attached afterwards and do not change which products qualify for a water finding.

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