Do I actually need a water filter?

Probably, depending on your zip code. The EPA's 2024 final PFAS rule set enforceable limits at 4 parts per trillion for PFOA and PFOS, and utilities have until 2029 to comply. Until then, EWG's Tap Water Database maps known contaminants in your local system. Look yours up before deciding. If your system shows elevated lead, chromium-6, trihalomethanes, or any PFAS, a filter is the fastest intervention.

Is reverse osmosis worth it?

For PFAS and fluoride specifically, yes. RO is the only consumer-grade technology that reliably removes both. Carbon filters don't touch fluoride and have mixed PFAS performance. RO does strip minerals along with contaminants, which is a real tradeoff, but the idea that demineralized water is harmful in meaningful amounts isn't supported by current evidence. If you want the minerals back, remineralization cartridges or a pinch of sea salt in a gallon jug solves it.

What's the difference between NSF 42, 53, 58, and 401?

NSF 42 covers aesthetic contaminants (chlorine, taste, odor). NSF 53 covers health-related contaminants (lead, cysts, VOCs, chromium-6). NSF 58 is specifically for reverse osmosis performance. NSF 401 covers emerging compounds (BPA, pharmaceutical residues, pesticides). A filter certified to only 42 is not a health filter. Look for 53 at minimum, ideally 53 and 401, and 58 if it's an RO system.

Does Berkey really not have NSF certification?

Correct. Berkey publishes independent lab test reports from labs like Envirotek and NSF-accredited labs, and the results are strong. But the company does not hold full NSF product certification the way AquaTru or APEC do. That's a defensible choice for a small company (NSF certification is expensive), but it's a real gap in the paper trail, and it's the reason Berkey has faced EPA questions in the past.

Will a water filter remove microplastics?

Reverse osmosis and properly-rated carbon block filters remove microplastics above 0.5 microns, per multiple 2020-2023 studies. Nanoplastics, below 100 nanometers, are harder. A 2024 paper in PNAS (Qian et al.) identified nanoplastics in bottled water at up to 240,000 particles per liter; filtered tap water is almost certainly a lower-particle exposure route than bottled.

What about shower filters?

Worth considering if your water is chlorinated or chloraminated. Chlorine and chloramines volatilize in hot water and are inhaled during showers. The exposure route is real, though the health significance is still debated. A simple KDF shower filter reduces the chlorine smell and reduces skin irritation for many people. We'd call it a tier-two upgrade, not a priority over your drinking water.

Srovnání· Kuchyně

Clean glass of water on a kitchen counter catching window light, with a generic countertop water dispenser blurred in the background.

Nejlepší domácí filtry na vodu: nástolný, podtlakový nebo centrální

Porovnali jsme filtry nástolné, pod dřez a hlavní podle redukce kontaminantů, průtoku a ceny za litr. Tady je naše seřazené doporučení.

93SUPERB!EXCELLENT

Skóre PFL

Carlos Sánchez·Apr 20, 2026·Testováno podle metodiky PFL V1.2

Autor: Tým PlasticFreeLabAktualizováno April 20, 202614 min čtení

Upozornění·PlasticFreeLab testuje a doporučuje nezávisle. Občas dostáváme provizi, když nakoupíte přes naše odkazy — naše pořadí to nikdy neovlivní.

Z čeho se skóre skládá

Jak vzniklo 93/100.

Bezpečnost materiálů · 35%95

Výkon · 20%96

Odolnost · 15%88

Uživatelský zážitek · 15%90

Poměr cena – kvalita · 15%89

Best overallNaše volba93

AquaTru Countertop Reverse Osmosis

AquaTru is the only countertop filter we found with NSF certifications across the four standards that matter (42, 53, 58, and 401), meaning independent labs have verified removal of PFAS, lead, fluoride, and pharmaceutical residues. No plumbing required, no under-sink install, and filter replacement is tool-free.

ReklamaCheck price · AquaTru

Seznam podle pořadí

Vše, co bychom koupili, popořadě.

8 voleb · seřazeno podle zásluh

01
Best overall93
AquaTru Countertop RO
Four-stage reverse osmosis in a countertop unit that plugs into a standard outlet. NSF certified to Standards 42, 53, 58, and 401: the full set that covers aesthetic contaminants, health-related contaminants, RO performance, and emerging compounds like PFOA, PFOS, and BPA. No plumber needed. Filters last six months to two years depending on stage. The tradeoff: you refill a tank, you wait, and it produces wastewater.
ReklamaCheck AquaTru
02
Best gravity filter82
Big Berkey Gravity Filter
A steel canister with ceramic-composite Black Berkey elements that uses gravity. No electricity, no plumbing. Independent lab reports show strong reduction of lead, chlorine, pathogens, and many VOCs. NSF certification is the weak point: Berkey does not hold NSF 53 on PFAS, and they've had regulatory disputes in California and Iowa. Excellent for off-grid, camping, and power outages. For daily home use with a grid connection, AquaTru's certification story is cleaner.
ReklamaCheck Berkey
03
Best budget84
Epic Pure Pitcher
A pitcher-format filter with published third-party testing against 200+ contaminants including PFAS, lead, chromium-6, and pharmaceuticals. Made in the US, replaceable cartridges, nothing to install. Slower flow than a Brita and pricier per cartridge, but the contaminant removal is a full tier above any mass-market pitcher. The sensible starting point if $400 for AquaTru isn't in budget this month.
ReklamaCheck Amazon
04
Best budget alternative80
Clearly Filtered Pitcher
Similar positioning to Epic Pure: published test data, strong PFAS and fluoride reduction, US-made. Cartridges last roughly 100 gallons. We'd flip a coin between Clearly Filtered and Epic Pure; both are honest products with transparent testing. Clearly Filtered's under-sink line is also worth considering if you want pitcher-grade filtration at the tap.
ReklamaCheck Amazon
05
Best under-sink RO86
APEC ROES-50 Under-Sink RO
A traditional five-stage under-sink reverse osmosis system at roughly half the installed cost of most competitors. NSF-certified components, well-documented install, and filters that are easy to source anywhere. Requires a dedicated faucet hole and storage tank under the sink. If you own your home and want plumbed-in RO, this is the default pick. Renters should stick to countertop.
ReklamaCheck Amazon
06
Best premium under-sink83
Waterdrop G3 Tankless RO
Tankless RO. Water is filtered on demand instead of sitting in a storage tank. NSF 58 and 372 certified. The premium over APEC buys you a smaller footprint and a TDS display on the faucet. Noisier than a tanked system when filtering. Worth it if your under-sink space is tight; otherwise APEC is the more boring, more repairable choice.
ReklamaCheck Amazon
07
Best whole-house78
Aquasana Rhino Whole-House
Whole-house carbon and KDF filtration, rated for roughly 1 million gallons (about 10 years for a family of four). Reduces chlorine, chloramines, lead, mercury, and VOCs site-wide, including shower and laundry water. NSF 42 certified. Does not remove fluoride or dissolved solids. For that you still want RO at the kitchen tap. Install requires a plumber and a shutoff.
ReklamaCheck Amazon
08
Budget honorable mention70
Brita Elite Pitcher
Brita's upgraded cartridge (formerly LongLast) is NSF certified to Standards 42 and 53 for lead, chlorine, and a short list of other contaminants. It's a real filter, not a placebo. The ceiling is low: no PFAS removal, no fluoride removal, no pharmaceutical claims. Fine as a bridge for a few months. Not fine as your permanent solution if you live anywhere with known PFAS contamination.
ReklamaCheck Brita

Co vynecháme — a proč

Pojmenováno, ne naznačeno.

ZeroWater Pitcher

Skip for most62

ZeroWater's ion-exchange resin does reduce total dissolved solids and lead effectively per NSF 53. The problem is taste: strong reduction of minerals leaves the water flat, and the cartridges develop a fishy smell as they exhaust. Cartridge lifespan in cities with hard water is short, and cost per gallon is high. The Epic Pure does a better job for similar money.

Refrigerator In-Door Filters (generic)

Skip56

Most factory fridge filters are certified only to NSF 42 (chlorine, taste, odor). They do not reliably remove lead, PFAS, or pharmaceutical residues. If your water source is municipally treated and you only want better taste, they're fine. For anything beyond that, don't rely on them as your primary filter.

Metodologie

Jak toto srovnání vzniklo

Co jsme hodnotili při výběru: Zveřejněné materiály, nezávislé certifikace, odolnost při skutečném vaření, nezávislé testy kontaminace, pokud jsou dostupné.
Jak jsme posuzovali: Prohlášení výrobců, regulační dokumenty, recenzované články a praktické zkoušky opotřebení. Čteme etikety a podklady, ne tiskové zprávy.
Kdo s námi nesouhlasí: V každém srovnání formulujeme protichůdné stanovisko co nejsilněji a jmenujeme značku, kterou jsme málem vybrali — a důvod, proč jsme ji nakonec nevybrali.
Co by nás přimělo změnit názor: Nové nezávislé laboratorní testy, změna receptury u značky v žebříčku nebo recenzované zjištění, které popírá naši stávající úvahu.

Časté otázky

Co se nás ptáte nejčastěji.

Do I actually need a water filter?: Probably, depending on your zip code. The EPA's 2024 final PFAS rule set enforceable limits at 4 parts per trillion for PFOA and PFOS, and utilities have until 2029 to comply. Until then, EWG's Tap Water Database maps known contaminants in your local system. Look yours up before deciding. If your system shows elevated lead, chromium-6, trihalomethanes, or any PFAS, a filter is the fastest intervention.
Is reverse osmosis worth it?: For PFAS and fluoride specifically, yes. RO is the only consumer-grade technology that reliably removes both. Carbon filters don't touch fluoride and have mixed PFAS performance. RO does strip minerals along with contaminants, which is a real tradeoff, but the idea that demineralized water is harmful in meaningful amounts isn't supported by current evidence. If you want the minerals back, remineralization cartridges or a pinch of sea salt in a gallon jug solves it.
What's the difference between NSF 42, 53, 58, and 401?: NSF 42 covers aesthetic contaminants (chlorine, taste, odor). NSF 53 covers health-related contaminants (lead, cysts, VOCs, chromium-6). NSF 58 is specifically for reverse osmosis performance. NSF 401 covers emerging compounds (BPA, pharmaceutical residues, pesticides). A filter certified to only 42 is not a health filter. Look for 53 at minimum, ideally 53 and 401, and 58 if it's an RO system.
Does Berkey really not have NSF certification?: Correct. Berkey publishes independent lab test reports from labs like Envirotek and NSF-accredited labs, and the results are strong. But the company does not hold full NSF product certification the way AquaTru or APEC do. That's a defensible choice for a small company (NSF certification is expensive), but it's a real gap in the paper trail, and it's the reason Berkey has faced EPA questions in the past.
Will a water filter remove microplastics?: Reverse osmosis and properly-rated carbon block filters remove microplastics above 0.5 microns, per multiple 2020-2023 studies. Nanoplastics, below 100 nanometers, are harder. A 2024 paper in PNAS (Qian et al.) identified nanoplastics in bottled water at up to 240,000 particles per liter; filtered tap water is almost certainly a lower-particle exposure route than bottled.
What about shower filters?: Worth considering if your water is chlorinated or chloraminated. Chlorine and chloramines volatilize in hot water and are inhaled during showers. The exposure route is real, though the health significance is still debated. A simple KDF shower filter reduces the chlorine smell and reduces skin irritation for many people. We'd call it a tier-two upgrade, not a priority over your drinking water.

Co by nás přimělo změnit názor

Nové nezávislé laboratorní testy, které popírají naše současné pořadí. Tichá změna receptury produktu z čela žebříčku, jež ztratí deklarovanou certifikaci. Recenzovaný článek, který mění bezpečnostní obraz některého z výše uvedených materiálů. Stránku aktualizujeme do týdne a vyznačíme, co se změnilo.

Bibliografie

Zdroje, které citujeme na této stránce.

O autorech

Tým PlasticFreeLab

Malá skupina badatelek a redaktorů, která prosekává hluk kolem netoxického života. Čteme studie, čteme etikety, zkoušíme produkty — a doporučení aktualizujeme s tím, jak se posouvá věda. Nepřijímáme platby za product placement, zveřejňujeme každý affiliate vztah a jmenujeme značky, které odmítáme.

Naše redakční zásady →Pošlete nám opravu →

Pokračujte ve čtení

Související v této rubrice.

Kuchyňský audit

Získejte kuchyňský audit.

Tisknutelný seznam více než padesáti kuchyňských předmětů, každý označený: vyměnit hned / vyměnit později / není potřeba. Zdarma. Doručeno okamžitě.

Přihlášením souhlasíte s našimi zásadami ochrany osobních údajů. Jeden klidný e-mail týdně. Odhlášení kdykoli.

12 stran
50+ položek

Nejlepší domácí filtry na vodu: nástolný, podtlakový nebo centrální

Jak vzniklo 93/100.

AquaTru Countertop Reverse Osmosis

Vše, co bychom koupili, popořadě.

AquaTru Countertop RO

Big Berkey Gravity Filter

Epic Pure Pitcher

Clearly Filtered Pitcher

APEC ROES-50 Under-Sink RO

Waterdrop G3 Tankless RO

Aquasana Rhino Whole-House

Brita Elite Pitcher