4.6
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Water Filter Reviews
Every filter we've reviewed, scored out of 5 on certified contaminant reduction, running cost, filter life, and flow.
32 filters
4.5
$475.00
4.3
$449.99
4.3
$759.00
4.2
$209.99
4.2
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4.2
$129.00
4.1
$749.00
4.1
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4.1
$47.99
4.1
$616.56
4.0
$28.12
3.9
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3.9
$211.49
3.9
$34.99
3.8
$109.99
3.7
$64.95
3.6
$550.00
3.6
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3.6
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3.5
$24.99
3.4
$267.00
3.3
$120.00
3.2
$179.99
3.1
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3.1
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3.1
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3.1
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3.0
$2,033.99
2.8
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2.7
$84.00
Aquasana OptimH2O FiltersUnder-sink
Not scored
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Prices are from Amazon.com or the brand's store and change often. We may earn a commission when you buy through these links; it never affects our scores.
LifeStraw Home Review (2026): WQA-Certified Glass Pitcher
WQA certifies the LifeStraw Home Glass 7-Cup for lead, metals and microplastics. Here’s what’s certified, what’s only lab-tested, and what it costs to run.
Kenmore 350 Water Softener Review (2026): Salt-Efficient
A one-piece salt softener certified by NSF International to NSF/ANSI 44 for hardness reduction and salt efficiency, sized for 1 to 4 people.
Aquasana SimplySoft Review (2026): Certified Salt Softener
A salt-based softener certified by IAPMO R&T to NSF/ANSI 44 for hardness reduction and salt efficiency, rated at 11 gallons a minute for up to 5 people.
Aquasana HealthShield: Whole House PFAS Water Filter (2026)
A whole house PFAS water filter certified by WQA, at every tap. Here’s what it removes, what isn’t certified and what it costs to run.
Aquasana SmartFlow Review (2026): Lead, PFOA/PFOS, Fluoride
Under-sink reverse osmosis certified for lead, PFOA/PFOS and fluoride, with minerals added back. What it removes, what the filters cost, and who it suits.
Culligan ZeroWater Pitcher Review
A pitcher certified for fluoride and total PFAS, which few are, plus lead, nitrate and pharmaceuticals. The catch is a 20-gallon filter that runs out faster on hard water.
Aquasana AQ-6300M Review (2026): Lead, PFOA/PFOS, No Waste
An under-sink carbon filter certified for lead and PFOA/PFOS that keeps minerals and wastes no water. What it removes, what it costs to run, and who it suits.
Culligan MaxClear Gravity Filter Review (2026): Lead & PFAS
The first gravity filter that can prove its lead and PFAS claims with an independent certification. The catch is a 50-gallon certified filter life that makes it the most expensive water we’ve costed.
Clearly Filtered Under-Sink Review (2026): Uses Your Faucet
Broad filtration through the faucet you already have, with no drilling, tank or wastewater. What’s certified, what’s only lab-tested, and what the filters cost.
APEC RO-90 Review (2026): Certified for Lead and Fluoride
Under-sink reverse osmosis with one of the broadest certified claim lists we’ve seen, and cheap US-made filters. What it removes, what it costs to run, and who it suits.