Our Picks for the Best Countertop Water Filters (Backed by Testing)

We narrowed the field to four countertop systems that stood out in both lab results and daily use. Each one represents a different approach — reverse osmosis, stainless gravity, large-volume carbon, and a premium glass dispenser — so you can weigh speed, upkeep, and water quality against your budget.

🔎 Expert Picks:

1. Best Overall: AquaTru Classic
2. Best for Preppers: Glacier Fresh 3-Gallon Gravity
3. Budget-Friendly: Epic Pure Dispenser
4. Best Premium Glass: ZeroWater 40-Cup Glass Dispenser

Each of these countertop filters offers unique strengths and trade-offs, making it easier to match performance, aesthetics, and budget with your household’s needs.

📊 How We Test & Score

Every filter we review—when possible—goes through Tap Score lab testing and real-world use. Because a countertop RO, gravity tank, and dispenser behave differently, we score each category with its own weighting.

• Countertop: portability, space efficiency, and per-gallon cost.
• Countertop RO: efficiency, waste ratio, and broad contaminant removal.
• Pitchers & Dispensers: taste, chlorine byproducts, metals, and filter life.

👉 See the full scoring framework for detailed weights and examples.

📝 How We Chose

These weren’t one-week trial runs. We’ve used most of these countertop systems ourselves — the AquaTru has been cycled through multiple rounds of Tap Score testing, Epic’s dispenser sees daily family use, and the Glacier Fresh has lived on our counter for long-term evaluation. ZeroWater’s glass unit rounds things out with NSF/ANSI certifications and published third-party performance data. In short, we looked beyond spec sheets and into how they perform day to day.

• Does it noticeably improve taste?
• How easy is setup, filling, and swapping filters?
• What’s the real cost per year to keep it running?
• Is there independent proof (NSF/ANSI certifications or Tap Score lab data when possible)?

Plenty of models didn’t make the cut because they couldn’t keep up. The four we did pick each earned their place by excelling where it matters most — whether that’s lab-verified contaminant removal, ease of use, or value over time.

#1. AquaTru Classic

Best for: Renters and families who want plug-and-play RO protection against PFAS, microplastics, and other tough contaminants without a full under-sink install.

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🧪 Independent Lab Testing

In addition to AquaTru’s published NSF/ANSI certifications, we partnered with Tap Score to verify real-world performance across two panels: PFAS and Microplastics.

PFAS (Per- and Polyfluoroalkyl Substances)

Tap Score Lab Results — AquaTru Classic Countertop RO (PFAS Panel)

PFAS Analyte	Before (City Tap)	After AquaTru RO	Change
PFOA	Detected trace	ND Removed	−100%
PFOS	Detected trace	ND Removed	−100%
PFHxS	Detected trace	ND Removed	−100%
PFNA	Detected trace	ND Removed	−100%
Other PFAS (9 additional)	Detected trace	ND Removed	−100%

“ND” = Not Detected above Tap Score reporting limits (0.00058–0.00099 µg/L depending on analyte). All 14 PFAS analytes in the panel were Not Detected after treatment.

Pre-test (City Tap, baseline): View baseline lab report
Post-test (AquaTru Classic, new filters): View PFAS lab report

Microplastics

Tap Score Lab Results — Microplastics (Baseline vs. 2025 Post-Install)

Size Range	Before	After	Change
1000–5000 µm	Not measured (2022)	ND Not Detected	−100%
500–1000 µm	Not measured (2022)	ND Not Detected	−100%
100–500 µm	Not measured (2022)	ND Not Detected	−100%
50–100 µm	Not measured (2022)	0.0147 count/mL At RL	Trace
10–50 µm	Not measured (2022)	ND Not Detected	−100%
<10 µm	Not measured (2022)	ND Not Detected	−100%

“ND” = Not Detected above Tap Score reporting limits. One trace particle (50–100 µm) recorded near reporting limit; all other ranges were Not Detected.

Post-test (AquaTru Classic, new filters): View microplastics lab report (PDF)

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🧾 How It Scored

Using the AquaTru day to day feels closer to a water jug than a filter. A full tank takes 15:53 to process, but you can pour mid-cycle without interruption. The carafe handle is sturdy and balanced, and cartridge swaps are no-tools jobs that click into place with a snap — no leaks, no drips.

Filters last 6 months (sediment/carbon) and 2 years (RO/VOC), with upkeep averaging about $100 a year (~$0.20–$0.25/gal). Multi-packs bring costs down further, and AquaTru’s 4:1 efficiency ratio wastes far less water than older countertop RO systems.

On performance, it’s one of the few countertop units with lab-verified removal of PFAS, THMs, and microplastics to non-detectable levels in Tap Score testing. Those results align with its deep stack of NSF/ANSI certifications (42, 53, 58, 401, 372) — covering chlorine, lead, VOCs, and “forever chemicals.”

👉 Bottom line: AquaTru balances lab-proven protection and everyday usability, making it a standout for renters and families who want true RO without a permanent install.

Read full review: Aquatru Review

#2. Glacier Fresh Gravity Filter

Best for: Households that want a simple, non-electric backup water source for daily or emergency use.

System	Upfront Cost	Filter Life	Est. Annual Cost
Glacier Fresh	$229.99 (includes 6 filters)	Carbon up to 3,000 gal Fluoride up to 1,000 gal	~$50–$85/yr
Berkey Big	$387 (2 Black elements)	Up to ~6,000 gal (pair)	~$30–$60/yr
ProOne Big+	$279 (2 elements)	Up to ~2,400 gal (pair)	~$90–$110/yr

*Estimates assume family use of ~3 gallons/day (≈1,095 gal/yr). Annual cost reflects typical replacement schedules after the first year. Real-world life varies with source water and whether fluoride filters are used continuously.

🧾 How It Scored

Performance: In NSF/ANSI 42 testing, Glacier Fresh filters cut chlorine taste and odor by nearly 98%. It doesn’t cover the full contaminant range of an AquaTru or Epic, but for a gravity-fed budget system, it delivers a verified baseline that most off-brand units can’t match.

Daily Use: This is a “fill and wait” system — expect a couple hours for a full reservoir. The 2.25-gallon stainless tank is enough to cover a family’s daily drinking water, and the build feels solid on the counter. The only quirk is the spigot seal, which needs to be tightened carefully to avoid drips when full.

Costs & Longevity: Each filter pair is rated for 3,000 gallons. At ~4 gallons per day for a family of four, that’s a little over 2 years of use per set. A 3-pack ($50) covers ~3 years, bringing the annual operating cost down to about $16 — roughly half a cent per gallon, making it one of the lowest-cost countertop options to maintain.

👉 Bottom line: Glacier Fresh isn’t fast, but it’s durable, inexpensive to run, and big enough for families who want a low-maintenance gravity filter without paying Berkey prices.

Read full review: Glacier Fresh Gravity Filter

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#3. Epic Pure Water Dispenser

Best for: Families and high-volume drinkers who want pitcher-level protection without constant refills — a practical middle ground between a small jug and a large gravity system.

🔬 Tap Score Lab Results — Epic

🧾 How Epic Scored

Epic held its own in our side-by-side comparisons, cutting chlorine taste and odor while removing lead entirely. It doesn’t have third-party lab data as extensive as Clearly Filtered, but its NSF/ANSI component certifications add credibility.

In our Tap Score test, even a trace 0.5 ppb of lead (well below the EPA action level of 15 ppb) was completely removed. That shows Epic can handle contaminants when they show up, even in small amounts.

Our sample also showed a rise in TDS and barium, a result of mineral exchange inside the filter. Both remained well within safe limits, and the water still tasted cleaner in day-to-day use.

On the user side, Epic filters taste better than ZeroWater — a win for purity drinkers — and filters last about 150 gallons (~4 months). That works out to ~$0.33 per gallon or about $100–$150 per year, making it one of the more cost-efficient options for families that drink a lot of water. Build quality is solid, though the lid can feel a little loose if you’re filling quickly.

👉 Bottom line: Epic Pure balances speed, cost, and lead removal across key contaminants, making it a practical pick if you want reliable performance without the higher ongoing cost of ZeroWater.

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#4. ZeroWater Glass Water Filter Dispenser

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🔬 Tap Score Lab Results — ZeroWater

🧾 How It Scored

ZeroWater stands out for being one of the few countertop dispensers with NSF/ANSI 42 & 53 certifications, proving it can cut both chlorine taste/odor and heavy metals like lead. Independent tests confirm it drops TDS to nearly zero, something most carbon filters can’t touch. That’s its clear advantage over budget gravity systems like Glacier Fresh.

In real-world use, the trade-off is speed. Our pitcher version took about 11 minutes for a full fill, so this 40-cup dispenser can stretch to 20–25 minutes. On the upside, you’re filtering in bulk — one cycle covers a day’s worth of drinking water for most families.

Build-wise, the glass carafe feels sturdier and more premium than plastic units, and the spigot pours smoothly once sealed. Still, the lid fit isn’t perfect, and tilting it while carrying can cause leaks — something to watch for when moving a full tank.

Filter life is shorter than rivals: about 15–20 gallons per cartridge before TDS creep sets in, meaning frequent replacements. With 3-packs running ~$30, annual costs can push $120–$150, far higher than Glacier Fresh or Berkey-style systems.

👉 Bottom line: If you want lab-certified lead removal and zero-TDS water in a countertop dispenser, ZeroWater delivers — but expect slower flow and higher filter costs compared to stainless gravity-fed systems.

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📘 Buyers Guide

Countertop filters sit in a unique middle ground — easier than under-sink installs, but more powerful than a basic pitcher. They’re popular with renters, families who go through gallons a day, and anyone who wants proven contaminant reduction without drilling or plumbing.

The catch?.. Not all countertop systems are built the same. Some lean on carbon for everyday taste improvements, others use gravity for off-grid reliability, and a few bring full reverse osmosis power to your counter. Knowing which type matches your home, habits, and budget is the key to buying the right one.

💧 What Countertop Filters Actually Do

Countertop filters all have the same goal — give you safer, better-tasting water without a full under-sink install — but how they get there is very different.

• AquaTru Classic uses reverse osmosis, stripping out contaminants like PFAS, fluoride, and microplastics that carbon filters miss.
• Glacier Fresh Gravity is about simplicity — no power, no plumbing, just slow gravity filtration that still carries NSF 42 certification.
• Epic Pure Dispenser takes pitcher-style carbon filtration and scales it up for families who drink gallons a day.
• ZeroWater Glass Dispenser goes all-in on ion exchange, cutting TDS to zero for the “purity-at-all-costs” crowd.

👉 In short: countertop doesn’t mean “all the same.” Each type balances different trade-offs in: speed, upkeep, and contaminant coverage.

⚖️ Countertop Filters vs. Other Options

Countertop filters hit a sweet spot between pitchers, faucet mounts, and full reverse osmosis systems. They’re bigger than a pitcher, cheaper than under-sink RO, and easier to live with than most faucet-mounted cartridges. Here’s how they stack up:

• Vs. Pitchers: Larger capacity and less refilling. Epic’s dispenser holds 1.7 gallons, while ZeroWater’s glass tank pushes 40 cups — enough for families. Pitchers, by comparison, are fine for one or two people.
• Vs. Faucet Mounts: Better contaminant coverage and more reliable flow. Faucet filters can reduce chlorine and sediment, but countertop units like Epic or ZeroWater add heavy metals and PFAS reduction.
• Vs. Gravity Systems (like Berkey): Similar non-electric design, but Glacier Fresh costs less and is NSF certified. The trade-off is slower filtration versus dispensers.
• Vs. Under-Sink RO: Countertop RO like AquaTru gives lab-grade protection without drilling. It’s pricier upfront than gravity units but avoids the complexity of a full install.

👉 Put simply: pitchers are small, faucet mounts are basic, RO is most thorough, but countertop systems strike the balance — enough capacity for families, real contaminant reduction, and no plumbing.

🧑‍👩‍👦 Who They’re Best (and Worst) For

Countertop water filters aren’t a one-size-fits-all fix. They shine in some households and fall short in others.

Best for:

• Renters or anyone who can’t drill or plumb in an under-sink system.
• Families who need more than a pitcher but don’t want to commit to a whole-house setup.
• Preppers and off-grid users who value a non-electric backup (gravity-fed units).
• City water users who mainly want chlorine, lead, or PFAS protection without reworking their plumbing.

Not ideal for:

• Large households burning through 5+ gallons a day (filters may struggle to keep up).
• Well water with iron, sulfur, or high sediment — countertop units aren’t built for heavy-duty contaminants.
• Anyone who dislikes the “flat” taste of ultra-pure water (ZeroWater users often mention this).

The takeaway: Countertop filters are a sweet spot for small-to-medium households on city water. But if you’re dealing with tough well water or heavy daily use, you’ll want to look at whole-house or under-sink alternatives.

🧪 Why Independent Testing Matters

Filter marketing is full of bold claims — “removes 200+ contaminants” — but without independent testing, it’s hard to know what that really means. NSF/ANSI certifications and third-party labs like Tap Score are what separate proven performance from clever copywriting.

• NSF/ANSI certifications: These are standardized lab protocols. For example, ZeroWater’s NSF 53 certification verifies lead reduction, while Glacier Fresh’s NSF 42 proves chlorine removal.
• Tap Score testing: Real-world lab reports add another layer. Our AquaTru Classic cut PFAS to non-detect and our Epic dispenser wiped out chlorine byproducts in side-by-side tests.

👉 Bottom line: trust certifications and lab data — not marketing buzzwords. If a system doesn’t share results, assume it can’t back up the claims.

📏 Key Features to Look For

Countertop systems all filter water, but the details that matter most differ by type. Here’s what to watch for:

• Filtration Method: AquaTru’s RO membrane pulls out PFAS, fluoride, and microplastics. Epic relies on solid carbon for lead and chlorine byproducts. ZeroWater uses ion exchange to hit “0 TDS,” while Glacier Fresh leans on gravity carbon for steady chlorine reduction.
• Capacity: Glacier Fresh holds 3 gallons — enough for daily family use. ZeroWater’s glass reservoir runs 40 cups in a batch. Epic’s 1.7-gallon dispenser fits a fridge shelf, while AquaTru cycles 3 quarts at a time.
• Filter Life: Glacier Fresh leads with 3,000 gallons per set. AquaTru’s cartridges last 6–24 months depending on stage. Epic filters run ~150 gallons, while ZeroWater swaps out after just 20–40 gallons.
• Certifications: AquaTru carries multiple NSF/ANSI listings (42, 53, 58, 401). ZeroWater is certified for lead and chromium. Glacier Fresh is NSF 42 verified for chlorine, while Epic holds testing across 42, 53, 401, and P473.

👉 Bottom line: look for the combo that fits your household — longer filter life saves money, bigger capacity means fewer refills, and certifications give peace of mind.

💲 Real Costs: Upfront vs Ongoing

Price tags only tell half the story — filter lifespan and replacement cost matter just as much.

System	Upfront Cost	Filter Life	Est. Annual Cost
AquaTru Classic	$449	6–24 mo (varies by stage)	~$100/yr (~$0.20–$0.25/gal)
Glacier Fresh Gravity	$229 (includes 6 filters)	Carbon: ~3,000 gal Fluoride: ~1,000 gal	~$50–$85/yr
Epic Pure Dispenser	$79	150 gal	~$100–$150/yr (~$0.33/gal)
ZeroWater Glass Dispenser	$74	20–40 gal	~$120–$150/yr

*Estimates assume family use of ~3 gallons/day (~1,095 gal/yr). Annual cost reflects typical replacement schedules after the first year. Real-world life varies with source water.

👉 The takeaway: cheap upfront isn’t always cheap long-term. If you drink a lot of water, filter life and replacement cost matter more than sticker price.

🚫 Common Mistakes to Avoid

Even the best countertop filter won’t live up to expectations if you trip on the basics. A few pitfalls to sidestep:

• Ignoring filter life: Running past rated gallons is the fastest way to ruin taste and risk breakthrough. Mark your calendar or use a reminder app.
• Expecting faucet-level flow: Gravity and carbon systems take time. If you need instant pressure, countertop RO is the better match.
• Skipping pre-flush or priming: Filters often need an initial rinse — skipping this can lead to cloudy water or off flavors.
• Wrong water type: Most countertop units are built for treated city water, not high-iron or sulfur-heavy well water.

💡 Bottom line: stay on top of filter changes and choose a system built for your water — that’s 90% of avoiding problem

✅ Final Thoughts

Countertop water filters are about balance — easier than under-sink installs, but far more capable than pitchers or faucet mounts.

• AquaTru delivers lab-grade RO without plumbing.
• Glacier Fresh offers simple, non-electric reliability.
• Epic Pure scales pitcher-style carbon into a family-sized dispenser.
• ZeroWater nails zero-TDS purity, though with higher upkeep.

Each shines in a different lane, but all four bring something valuable to the table. If you want cleaner water without tearing into your plumbing, a countertop system is one of the smartest, most practical upgrades you can make.