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Marcus Chen

Marcus Chen is our lead researcher. He checks every certification claim against NSF International, IAPMO R&T and WQA listings, reads makers' published test data, and works out what each filter really costs to run.
AquaTru countertop reverse osmosis system beside a ZeroWater filter pitcher in a bright kitchen.

AquaTru vs ZeroWater (2026): Which Removes More?

Countertop reverse osmosis or the Culligan ZeroWater pitcher: what each is certified to remove, what it costs to run, and who should buy which.

Reverse osmosis water filtration system with a glass of clear water beside a modern kitchen sink.

Best Water Filter for PFAS (2026): 8 Certified Picks

Eight filters certified for PFAS, from pitchers to whole-house systems, with the difference between PFOA/PFOS and Total PFAS claims explained.

Water filter pitcher and glass of clean water beside a stream of water showing tiny microplastic particles.

Best Water Filter for Microplastics (2026): Certified Picks

Six filters certified to reduce microplastics, from a pitcher to countertop reverse osmosis, and the claims to check before you buy.

Stainless steel countertop gravity water filter with a glass of water in a bright modern kitchen.

Berkey Lawsuit (2026): What Happened After the EPA Orders

Why the EPA ordered Black Berkey sales stopped, where the Texas and Puerto Rico cases stand, what Berkey sells now, and what its certification covers.

Three-stage under-sink water filtration system installed beneath a kitchen sink.

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.

Countertop water filtration system with visible filter cartridges beside a glass of clear drinking water.

Best Water Filter for Fluoride (2026): 7 Certified Picks

Seven filters certified to reduce fluoride, from countertop and under-sink reverse osmosis to the one certified pitcher.

Stainless steel countertop water filter dispenser beside a glass of drinking water in a modern kitchen.

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.

Under-sink water filtration system with a glass of clear water and old plumbing fittings on a kitchen counter.

Best Water Filters That Remove Lead (2026): 8 Picks

Eight filters certified to reduce lead, from a cheap pitcher to reverse osmosis, with the certifier named for each.

Gravity water filter dispenser on a kitchen counter beside a glass of filtered water.

Best Gravity Water Filters (2026): Certified Picks, Ranked

Which gravity filters are certified for lead, PFAS and microplastics, who certifies them, and what each costs per gallon. Berkey’s certification depends on the elements you buy.

Two under-sink reverse osmosis systems with storage tanks and dedicated faucets shown side by side for an iSpring RCC7AK vs APEC ROES-50 comparison.

iSpring RCC7AK vs APEC ROES-50 (2026): Which RO System Wins?

Two budget under-sink RO systems, both certified to NSF/ANSI 58 but for very different claims: what each removes, what it costs to run, and which to buy.

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Drinking Water Filter

Independent, research-led reviews of home water filtration. Reader-supported, so we may earn a commission on purchases, at no cost to you.

Reviews
Best drinking water filtersAquaTru Carafe reviewBig Berkey reviewCulligan ZeroWater reviewAll reviews
Comparisons
ZeroWater vs BritaBrita vs PUR vs ZeroWaterAquaTru Carafe vs ClassicAquaTru vs Clearly FilteredAquaTru vs WaterdropiSpring vs APEC ROES-50All comparisons
Contaminants
PFASLeadFluorideChlorineHard waterMicroplasticsAll contaminants
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