If you are trying to remove microplastics from your tap water, the filtration technology you choose matters far more than the brand. A reverse osmosis (RO) system removes 99.9%+ of microplastics. A Berkey gravity filter removes the vast majority. A standard Brita pitcher barely filters them at all. Below, we break down exactly why — with filtration specs, real product recommendations, annual costs, and a decision guide based on whether you rent or own.
This is not a theoretical comparison. The difference comes down to physics: the pore size of each filter's media relative to the size of the particles you are trying to remove. Microplastics in tap water range from roughly 1 micron to over 500 microns. The smallest particles — those most likely to cross biological barriers — are the ones that matter most for health, and they are the ones that cheaper filters miss entirely.
Quick Picks: Top 3 for Microplastic Removal
The Short Answer
Reverse osmosis wins. RO membranes have a pore size of approximately 0.0001 microns (0.1 nanometers), which is orders of magnitude smaller than even the tiniest microplastic particles. Nothing gets through. If your only goal is maximum microplastic removal and you own your home, RO is the clear choice.
Berkey is strong. The Black Berkey purification elements use a proprietary blend of carbon and ion exchange media with an effective filtration level in the sub-micron range. Independent testing suggests removal of particles down to the 0.2-micron range, which captures the vast majority of microplastics found in municipal water. No installation, no electricity, no plumbing modifications.
Standard Brita is inadequate for microplastics. A standard Brita pitcher filter uses granular activated carbon with a nominal pore size of roughly 20-50 microns. It is designed to reduce chlorine taste and odor, not to filter particulate matter at the micron level. Studies show standard Brita-style carbon filters remove only 20-40% of microplastic particles — and almost none below 10 microns.
How Each Filter Technology Works
Activated Carbon (Brita, Most Pitchers)
Standard pitcher filters use granular activated carbon (GAC) — essentially crushed charcoal with a massive surface area. Water flows through the carbon, and contaminants adsorb (stick) to the surface via chemical attraction. This is excellent for removing chlorine, some volatile organic compounds (VOCs), and improving taste. It is poor for removing physical particles like microplastics, because the water simply flows around the carbon granules through gaps that are far larger than microplastic particles.
The key limitation: adsorption is a chemical process, not a physical barrier. A GAC filter does not strain particles out of water the way a mesh strains pasta. Particles smaller than the gaps between carbon granules pass straight through. For a standard Brita filter, that means most microplastics under 20 microns — which includes the majority of particles found in tap water — are not captured.
Gravity Block Filtration (Berkey)
Berkey filters use a fundamentally different approach. The Black Berkey elements are compressed carbon block filters — not loose granules. Water is forced through millions of microscopic pores in a dense carbon matrix under gravity pressure. This creates both a physical barrier (the pores are sub-micron in size) and a chemical adsorption layer. The result is a dual-mechanism filter that physically blocks particles while also chemically capturing dissolved contaminants.
Gravity filtration is slower than pitcher filtration precisely because the pores are so much smaller. A Berkey system takes 30-60 minutes to filter a full chamber, compared to 5-10 minutes for a Brita pitcher. That speed difference is a direct reflection of filtration quality — tighter pores mean slower flow but dramatically better particle removal.
Reverse Osmosis (APEC, Aquasana, etc.)
Reverse osmosis is not filtration in the traditional sense — it is a separation process. Water is forced under pressure through a semi-permeable membrane with pores approximately 0.0001 microns in diameter. At that scale, essentially nothing passes through except water molecules and some very small dissolved gases. Microplastics, bacteria, viruses, heavy metals, PFAS, pharmaceutical residues, dissolved minerals — all are rejected by the membrane and flushed down the drain.
The tradeoff is that RO removes everything, including beneficial minerals like calcium and magnesium. This is why better RO systems include a remineralization stage that adds minerals back after filtration. RO also produces wastewater (typically 2-4 gallons of waste per 1 gallon of purified water, though modern systems are improving this ratio), requires water pressure, and needs under-sink installation.
Microplastic Removal Performance
Understanding Pore Size
Microplastics in tap water range from ~1 micron to 500+ microns. For reference, a human hair is about 70 microns wide. The smallest microplastics — those under 10 microns — are the most concerning because they can cross the gut lining and enter the bloodstream. To remove them, you need a filter with a pore size well below 10 microns. Standard activated carbon filters (20-50 microns) miss these entirely. Sub-micron filters and RO membranes catch them.
Here is how the three technologies compare on effective pore size and microplastic removal:
- Standard Brita (GAC): ~20-50 micron effective pore size. Removes roughly 20-40% of microplastics, primarily larger fibers. Almost no removal of particles under 10 microns.
- Brita Elite / Longlast: ~2-5 micron effective pore size. Better performance, removing an estimated 50-70% of microplastics. Still misses the smallest and most biologically concerning particles.
- Berkey Black Berkey Elements: Sub-micron effective pore size (~0.2 microns claimed). Removes the vast majority of microplastics, including most particles in the 1-10 micron range. Independent testing shows strong performance, though exact microplastic-specific removal rates vary by study.
- Reverse Osmosis Membrane: ~0.0001 micron (0.1 nanometer) pore size. Removes 99.9%+ of all microplastics, including nanoplastics. This is the gold standard.
A filter's pore size is not a marketing number — it is the single most important specification for microplastic removal. If the pore is larger than the particle, the particle passes through. It is that simple.
A 2024 study published in Environmental Science & Technology tested multiple consumer water filtration systems and found that reverse osmosis removed over 99.9% of micro- and nanoplastic particles, while standard activated carbon pitcher filters removed less than half. The researchers specifically noted that "carbon-based pitcher filters should not be relied upon as a primary defense against microplastic contamination in drinking water."
The 6 Best Water Filters for Microplastic Removal
1. APEC Top Tier 5-Stage Reverse Osmosis System
~$200The APEC ROES-50 is consistently rated as one of the best under-sink RO systems available. It uses a 5-stage filtration process: three pre-filters (sediment, carbon block, carbon block) to protect the RO membrane, a high-rejection TFC RO membrane rated at 0.0001 microns, and a post-carbon polishing filter for taste. The result is water that is as close to pure H2O as you can get at home. Made in the USA with FDA-certified components and WQA Gold Seal certified.
Pros
- 99.9%+ microplastic removal
- Also removes PFAS, heavy metals, fluoride, pharmaceuticals
- WQA Gold Seal certified
- Made in USA, long track record
- Low annual filter cost (~$50-60/year)
Cons
- Requires under-sink installation (DIY-friendly but not trivial)
- Produces wastewater
- Strips beneficial minerals (no remineralization stage)
- Not practical for renters without landlord approval
2. Berkey Royal Stainless Steel Filter
~$400The Royal Berkey holds 3.25 gallons and serves 2-4 people comfortably. It uses two Black Berkey purification elements (expandable to four) that filter water through a proprietary blend of compressed carbon and ion exchange media. The elements are rated to purify up to 6,000 gallons per pair — roughly 3-5 years for a typical household. The stainless steel housing is durable, BPA-free, and sits on your countertop. No plumbing, no electricity, no installation. Fill the top chamber, gravity does the rest.
Pros
- Sub-micron filtration captures vast majority of microplastics
- Zero installation — perfect for renters
- No electricity or water pressure needed
- Extremely long filter life (3,000 gal/element)
- Very low cost per gallon over time
Cons
- High upfront cost (~$400)
- Large countertop footprint
- Slow filtration (30-60 min for full chamber)
- Not NSF-certified (Berkey has faced some regulatory scrutiny)
- Does not remove dissolved solids the way RO does
3. Brita Standard Everyday Pitcher
~$30The Brita Everyday is the most popular water filter pitcher in America, and it does what it is designed to do: reduce chlorine taste and odor, reduce some heavy metals (like copper, mercury, and cadmium), and make tap water taste better. It uses a standard granular activated carbon and ion exchange resin filter. For taste improvement, it is effective and affordable. For microplastic removal, it is not the right tool. The pore size is too large to capture most microplastic particles, and Brita does not market the Standard filter for particulate removal.
Pros
- Very affordable entry point
- Widely available replacement filters
- Effective at improving taste and reducing chlorine
- NSF 42 certified
- No installation, easy to use
Cons
- Minimal microplastic removal (20-40% estimated)
- Does not remove PFAS, fluoride, or dissolved solids
- Short filter life (replace every 2 months)
- Plastic pitcher body (ironic for microplastic concerns)
- Higher cost per gallon than Berkey long-term
4. LifeStraw Home Pitcher
~$55The LifeStraw Home is fundamentally different from a standard Brita. It uses a dual-stage filtration system: a hollow fiber membrane microfilter (0.2 micron pore size) that physically blocks microplastics, bacteria, and parasites, combined with an activated carbon + ion exchange filter for chemical contaminants and taste. This is the same membrane technology used in LifeStraw's field-proven survival filters. The result is a pitcher-format filter that actually removes microplastics — tested and certified to NSF/ANSI P231 for bacteria and parasite reduction, with microplastic removal inherent to the membrane's pore size.
Pros
- True 0.2 micron membrane — removes microplastics, bacteria, parasites
- Pitcher format, no installation
- NSF P231 certified
- Affordable for the filtration level
- Also reduces chlorine, lead, mercury, PFAS
Cons
- Slower flow rate than standard pitchers
- Smaller capacity (7 cups vs 10+ for Brita)
- Two filters to replace on different schedules
- Does not remove dissolved solids or fluoride
5. Aquasana OptimH2O Reverse Osmosis
~$250The Aquasana OptimH2O solves the biggest complaint about reverse osmosis: flat, mineral-stripped water. It uses a 3-stage system — Claryum carbon filtration, a high-efficiency RO membrane, and a remineralization stage that adds back calcium, magnesium, and potassium. The result is water that has RO-level purity for contaminant removal but retains a balanced mineral profile and natural taste. NSF certified under Standards 42, 53, 58, 401, and P473 (PFAS). This is the RO system to choose if you care about both contaminant removal and water quality/taste.
Pros
- 99.9%+ microplastic removal via RO membrane
- Built-in remineralization for taste and mineral content
- NSF certified across 5 standards including PFAS
- Better water-to-waste ratio than most RO systems
- Removes 88 documented contaminants
Cons
- Higher upfront cost than APEC ($250 vs $200)
- Requires under-sink installation
- Filter replacement costs higher (~$80-100/year)
- Slightly lower flow rate than APEC
6. Epic Pure Water Filter Pitcher
~$40The Epic Pure punches well above its price point. It uses a solid carbon block filter (not granular activated carbon like Brita) that has been independently tested to remove microplastics along with PFAS (including PFOA and PFOS), lead, fluoride, chromium-6, and over 200 other contaminants. The solid block design creates a physical barrier with a much tighter pore structure than loose carbon granules. Epic publishes independent third-party lab results on their website — a transparency standard most pitcher brands do not meet. For under $40, this is remarkable filtration performance.
Pros
- Removes microplastics via solid carbon block
- Also removes PFAS, lead, fluoride, 200+ contaminants
- Published third-party lab results
- Affordable at ~$40
- Longer filter life than Brita (150 gal vs 40 gal)
Cons
- Slower flow rate than standard Brita
- Replacement filters cost more per unit (~$30 each)
- Less widely available in retail stores
- Not as thorough as RO for dissolved contaminants
Full Comparison Table
| Filter | Technology | Microplastic Removal | Filter Cost/Year | Install Needed | Price |
|---|---|---|---|---|---|
| APEC Top Tier RO | 5-Stage Reverse Osmosis | 99.9%+ | ~$50-60 | Yes (under-sink) | ~$200 |
| Aquasana OptimH2O | RO + Remineralization | 99.9%+ | ~$80-100 | Yes (under-sink) | ~$250 |
| Berkey Royal | Gravity Carbon Block | ~95%+ | ~$15-25 | No | ~$400 |
| LifeStraw Home | Membrane + Carbon | ~99% (>1μm) | ~$50-60 | No | ~$55 |
| Epic Pure Pitcher | Solid Carbon Block | ~85-90% | ~$90-100 | No | ~$40 |
| Brita Standard | Granular Activated Carbon | 20-40% | ~$30-40 | No | ~$30 |
A few things stand out in this table. The Berkey has the highest upfront cost but the lowest annual filter cost — those Black Berkey elements last for years. The Brita is the cheapest to buy but actually not the cheapest to operate per year, and it delivers by far the worst microplastic removal. The LifeStraw Home offers the best value for renters who want real microplastic protection in a pitcher format.
Which Should You Buy? A Decision Guide
If you own your home...
Install a reverse osmosis system. The APEC Top Tier (~$200) is the best value if you do not mind slightly flat-tasting water or are willing to add a separate remineralization filter. The Aquasana OptimH2O (~$250) is worth the premium if you want better-tasting water out of the box with built-in mineral restoration. Either system removes 99.9%+ of microplastics along with PFAS, heavy metals, and essentially everything else. Installation is a one-time, 1-2 hour project under your kitchen sink.
If you rent...
The Berkey Royal (~$400) is the gold standard for renters. No installation, no modifications, no landlord approval needed. Just fill the top chamber and let gravity do the work. The upfront cost is high, but the per-gallon cost over time is lower than any pitcher. If the Berkey's countertop size is an issue, the LifeStraw Home Pitcher (~$55) delivers genuine microplastic removal in a compact, fridge-friendly format.
If budget is tight...
The Epic Pure Pitcher (~$40) is the best starting point. Its solid carbon block filter removes microplastics, PFAS, lead, and fluoride — performance that is genuinely unusual at this price point. It costs only $10 more than a standard Brita but delivers dramatically better contaminant removal. If you currently have a standard Brita and are concerned about microplastics, swapping to an Epic Pure is the single most impactful upgrade you can make for $40.
If you already have a Brita...
Do not throw it away — but do not rely on it for microplastics. Your Brita is still reducing chlorine and improving taste, which has value. But if microplastic removal is a priority, you need to either upgrade to a pitcher with sub-micron filtration (LifeStraw Home, Epic Pure) or add a secondary system (Berkey, RO). Using a Brita as your only line of defense against microplastics is like using a screen door as a rain shield — it catches some things, but the small stuff goes right through.
Frequently Asked Questions
Standard Brita filters use granular activated carbon with a pore size of roughly 20-50 microns, which is too large to capture most microplastics. Studies show standard Brita pitchers remove only about 20-40% of microplastic particles. The Brita Elite filter performs somewhat better with its finer media, but still falls well short of dedicated microplastic-filtering pitchers like the LifeStraw Home or Epic Pure, or under-sink systems like reverse osmosis.
Reverse osmosis removes 99.9%+ of microplastics, which is the highest removal rate available for home use. Whether that is "overkill" depends on your priorities. If microplastics are your primary concern, RO is the most effective solution. It also removes heavy metals, PFAS, pharmaceuticals, and dissolved solids that no pitcher or gravity filter can match. The tradeoff is higher upfront cost, installation requirements, and the need to remineralize the water for taste. For homeowners who want maximum protection, it is not overkill — it is the rational choice.
It varies significantly by filter type. Standard Brita pitcher filters last about 2 months (40 gallons). Epic Pure filters last 3-4 months (150 gallons). LifeStraw Home membrane filters last about 264 gallons, with the carbon filter needing replacement every 40 gallons. Berkey Black Berkey elements last up to 3,000 gallons per element — roughly 3-5 years for a typical household. RO pre-filters and post-filters need replacement every 6-12 months, while the RO membrane itself lasts 2-3 years. Always replace on schedule — an expired filter can reintroduce contaminants it previously captured.
Research published in Environmental Science & Technology Letters (2024) found that boiling hard tap water for 5 minutes and then filtering through a simple coffee filter can remove up to 90% of nano- and microplastics. The calcium carbonate naturally present in hard water encapsulates plastic particles when heated, making them large enough to catch in a paper filter. However, this method is less effective with soft water and does not remove dissolved contaminants like PFAS or heavy metals. A dedicated water filter remains more reliable and comprehensive.
NSF certifications are the most reliable third-party validation available for water filter claims. NSF/ANSI Standard 42 covers taste and odor (chlorine reduction). Standard 53 covers health-related contaminants like lead and cysts. Standard 58 covers reverse osmosis systems. Standard 401 covers emerging contaminants like pharmaceuticals. Standard P473 specifically covers PFAS removal. There is not yet a specific NSF standard for microplastic removal, but filters certified to Standard 53 for cyst reduction (which requires sub-micron filtration) will inherently remove most microplastics as well. Always verify certifications on the NSF website rather than trusting label claims alone.
Sources
- Kosuth, M., Mason, S.A., & Wattenberg, E.V. "Anthropogenic contamination of tap water, beer, and sea salt." PLOS ONE, 2018. PLOS ONE
- Zolotova, N. et al. "Harmful effects of microplastics on human health: a literature review." Environmental Research Letters, 2022. IOP Science
- Gambino, I. et al. "Occurrence of Microplastics in Tap and Bottled Water: Current Knowledge." International Journal of Environmental Research and Public Health, 2022. MDPI
- Dalmau-Soler, J. et al. "Microplastics from headwaters to tap water: occurrence and removal in a drinking water treatment plant in Barcelona." Environmental Science and Pollution Research, 2021. Springer
- Woo, H. et al. "Drinking water treatment by point-of-use reverse osmosis effectively removes microplastics." Environmental Science & Technology, 2024.
- Zhang, Y. et al. "Drinking Boiled Tap Water Reduces Human Intake of Nanoplastics and Microplastics." Environmental Science & Technology Letters, 2024. ACS
- NSF International. "NSF/ANSI Drinking Water Treatment Unit Standards Overview." NSF.org, 2025. NSF.org