Editorial Independence: Filter Tested accepts no payment from manufacturers for reviews or rankings. We earn commissions through Amazon affiliate links when you purchase through our site, but this never influences our recommendations. Read our full disclosure.
Only reverse osmosis and sub-micron gravity filtration reliably strip microplastics out of tap water; standard carbon pitchers and refrigerator filters barely touch them. Our top pick is the iSpring RCC7 6-stage RO system for its 0.0001-micron membrane and proven all-around performance, with the APEC ROES-50 as a compact, budget-friendly runner-up.
Table of Contents
Quick Answer
The key point: Microplastic particles range from about 5 millimeters down to under 1 micron, and most of them, especially the smallest nanoplastic fraction, slip straight through a standard carbon pitcher or fridge filter. Reverse osmosis membranes rated around 0.0001 micron are the only technology that reliably blocks the entire size range, with sub-micron gravity systems a distant second. For most households we recommend the iSpring RCC7 under-sink system, with the more compact APEC ROES-50 as a runner-up and the AquaTru Classic as the best no-plumbing option for renters.
Comparison Table
| Filter | Type | Microplastic Removal | Price | Best For |
|---|---|---|---|---|
| iSpring RCC7 | Under-sink RO, 6-stage | Effectively complete (0.0001 micron) | $190-$230 | Whole-kitchen protection, best all-around value |
| APEC ROES-50 | Under-sink RO, 5-stage | Effectively complete (0.0001 micron) | $180-$220 | Smaller cabinets, proven reliability |
| AquaTru Classic | Countertop RO, 4-stage | Effectively complete (0.0001 micron) | $330-$450 | Renters and no-plumbing installs |
| Big Berkey | Gravity, sub-micron | Strong on larger fragments, weaker on nanoplastics | $300-$350 | Off-grid use, large households, emergencies |
| ZeroWater 10-Cup Pitcher | Pitcher, 5-stage ion exchange | Partial, best on visible fragments | $35-$50 | Renters on a tight budget who want an easy first step |
Why Microplastics Are Different From Other Contaminants
Most of the guides on this site cover dissolved contaminants: lead, arsenic, fluoride, and dissolved organic chemicals that pass through water as ions or molecules. Microplastics behave completely differently. They are physical particles, plastic fragments and fibers that range from about 5 millimeters down to roughly 1 micron for microplastics, and below 1 micron for the emerging nanoplastic fraction. That size range matters because filtration is fundamentally a sieving problem: a filter either has pores small enough to physically block a particle, or the particle passes through no matter how "good" the filter is marketed as.
As our guide to microplastics in drinking water explains, a 2017 Orb Media study found microplastics in 83% of global tap water samples, and the WHO has confirmed they are now essentially ubiquitous in both tap and bottled water. There is currently no dedicated NSF/ANSI standard specific to microplastics removal, so shoppers cannot simply look for a certification badge the way they would for lead (NSF 53) or PFAS. Instead, the filtration technology and its rated pore size are the only reliable predictors of performance, which is why this guide leans heavily on micron ratings rather than marketing claims.
Best Water Filters for Microplastics
1. iSpring RCC7 6-Stage Reverse Osmosis System (Best Overall)
The iSpring RCC7 is our top pick for microplastics because it pairs a true 0.0001-micron RO membrane with sediment and carbon pre-filters that extend membrane life. That membrane pore size is roughly 1,000 times smaller than the smallest nanoplastic particles researchers have detected in tap water, so functionally nothing in the plastic-particle size range gets through. It also strips lead, PFAS, chlorine byproducts, and the other contaminants covered in our full iSpring RCC7 review, which makes it a strong all-around choice rather than a single-issue fix. Installation requires under-sink space and a drain tap; budget an afternoon for a DIY install or the cost of a plumber.
Standout strengths: Six-stage filtration, widely available replacement cartridges, strong reputation for reliability among the RO systems we track. Trade-offs: Produces roughly 3-4 gallons of wastewater per gallon filtered, and the tank takes up under-sink cabinet space.
2. APEC ROES-50 (Best Compact Runner-Up)
The APEC ROES-50 uses the same 0.0001-micron membrane technology as the iSpring, so its microplastic removal is functionally identical, but its five-stage housing has a smaller footprint that fits tighter cabinets. APEC has built its reputation on component quality, and this model is one of the most recommended entry-level RO systems in our best reverse osmosis systems roundup. It is a good choice if the iSpring's tank will not clear your under-sink plumbing.
Standout strengths: Slim housing, well-regarded customer support, consistent TDS reduction test results. Trade-offs: Slightly lower flow rate than some competitors, and like all standard RO systems it strips beneficial minerals along with contaminants.
3. AquaTru Classic (Best No-Plumbing Option)
Renters and anyone who cannot modify under-sink plumbing should look at the AquaTru Classic. It delivers the same 0.0001-micron RO filtration in a self-contained countertop unit: fill the top reservoir, and it pumps filtered water into a lower tank with no drain line or faucet drilling required. Our full AquaTru Classic review covers setup and filter-cost details. It costs more upfront than an under-sink system and its cartridges run slightly pricier per gallon, but the zero-installation convenience is worth it for apartments and short-term rentals.
Standout strengths: No installation, countertop footprint, four-stage filtration with a mineral-friendly design. Trade-offs: Higher upfront cost, smaller daily output than a plumbed-in system, and you need counter space for both tanks.
4. Big Berkey (Best for Off-Grid and Emergency Use)
The Big Berkey uses gravity-fed carbon elements rated down to roughly 0.2 micron, which is small enough to catch the great majority of microplastic fragments but not fine enough to guarantee removal of the smallest nanoplastic particles the way an RO membrane can. What it offers instead is independence from plumbing and electricity, large-batch capacity, and a proven track record covered in our Berkey countertop filter review. It is the right choice for cabins, RVs, and emergency-preparedness stockpiles where an RO system is not practical, but households specifically worried about nanoplastics should treat it as a strong second-tier option rather than a top pick.
Standout strengths: No electricity or plumbing needed, large capacity for families, long-lasting elements. Trade-offs: Weaker against the smallest nanoplastic fraction than RO, and refilling the upper chamber is a manual chore.
5. ZeroWater 10-Cup Pitcher (Best Budget Starting Point)
The ZeroWater 10-Cup Pitcher is not a dedicated microplastics solution, but its five-stage ion-exchange filter with a fine mesh pre-filter catches more particulate matter than a typical activated-carbon pitcher, and it is the cheapest entry point on this list by a wide margin. Our ZeroWater dispenser review covers the larger dispenser version if a pitcher will not keep up with your household. Treat this as a stopgap for renters or students who want meaningfully better filtration than tap water right now, with a plan to upgrade to RO later.
Standout strengths: Low upfront cost, no installation, also reduces TDS and improves taste. Trade-offs: Filters need frequent replacement, refilling by hand is slow for a family, and it will not catch the smallest nanoplastic particles.
Do Carbon Filters and Pitchers Remove Microplastics?
Standard activated carbon, the kind found in most refrigerator filters, faucet-mount filters, and basic pitcher cartridges, is built to adsorb dissolved chemicals like chlorine and some organic compounds, not to physically screen out particles in the microplastic size range. Carbon block filters with a tight micron rating can catch larger fragments incidentally, but a typical carbon cartridge is not rated or tested for microplastics removal, and manufacturers rarely make that claim on the label. If your current filter is a basic carbon pitcher or a refrigerator door filter, assume it is doing little to nothing against microplastics specifically, even though it may be helping with chlorine taste and smell. For a broader look at what carbon filtration is actually good at, see our how reverse osmosis works guide, which contrasts membrane filtration against carbon adsorption.
Micron Ratings and Certification Gaps
Because there is no NSF/ANSI standard written specifically for microplastics removal, the pore size of a filter is the most useful number a shopper actually has. Our micron ratings guide breaks down the full range, but the short version for this topic: visible plastic fragments start around 5,000 microns and the microplastic category runs down to about 1 micron, with nanoplastics below that. A standard sediment pre-filter (5-20 microns) catches only the largest fragments. A tight carbon block (0.5-1 micron) catches most microplastics but can miss nanoplastics. Only RO membranes, rated around 0.0001 micron, reliably clear the entire range, which is why every top pick on this list other than the budget pitcher is an RO system.
Common Mistakes When Shopping for Microplastics Filtration
The biggest mistake we see is trusting a "BPA-free" or "microplastic-free" label on the filter housing itself rather than looking at what the filter actually removes from your water. A pitcher can be molded from BPA-free plastic and still do almost nothing to filter microplastics out of the water passing through it; those are two unrelated claims that marketing copy often blurs together. A second common mistake is assuming any reverse osmosis system automatically qualifies. Look for a membrane specifically rated in the 0.0001 to 0.0005 micron range; some budget "RO" units on marketplaces cut corners with looser membranes or skip proper NSF/ANSI 58 structural integrity testing, which matters because a failed membrane seal can let raw tap water bypass filtration entirely.
A third mistake is ignoring maintenance cost when comparing sticker prices. A $35 pitcher and a $220 RO system are not really competing on the same axis: the pitcher needs a new $8-15 filter roughly every 40 gallons, while an RO membrane typically lasts 2-3 years and pre-filters run every 6-12 months. Over a three-year ownership window, the total cost of the two options is often closer than the upfront price suggests, and the RO system delivers dramatically better and broader contaminant removal for that money, not just on microplastics but across the full list in our water contaminant database.
Which Filter Fits Your Situation
- Own your home, want the most complete protection: an under-sink RO system like the iSpring RCC7 or APEC ROES-50.
- Rent or cannot modify plumbing: the AquaTru Classic countertop RO system.
- Off-grid, RV, or emergency-preparedness use: the Big Berkey gravity system.
- Tight budget, want an immediate improvement: the ZeroWater pitcher, with a plan to upgrade to RO when possible.
- Already own an RO system: you are already well covered against microplastics; focus your next upgrade on a remineralization add-on if flat-tasting water bothers you, covered in our RO remineralization guide.
Frequently Asked Questions
Basic carbon pitcher filters are not designed or tested to remove microplastics, so they catch some larger fragments incidentally at best. A pitcher with a tighter mesh pre-filter, like ZeroWater, does somewhat better, but only reverse osmosis reliably clears the full microplastic and nanoplastic size range.
For complete microplastics protection, yes, RO is currently the only widely available consumer technology that removes particles down to the nanoplastic range. Gravity filters like Berkey get you most of the way there for larger fragments at a lower cost, which is a reasonable trade-off for many households.
No. Boiling can actually concentrate microplastics as water evaporates, and some research has found it may cause certain plastics to shed additional particles. Boiling addresses biological contamination, not physical plastic particles.
Follow the manufacturer's cartridge and membrane replacement schedule exactly. A clogged or expired RO membrane or gravity element does not just filter less efficiently, it can develop bypass channels that let unfiltered water through, defeating the purpose entirely.
Generally worse. The 2017 Orb Media study found bottled water averaged higher microplastic particle counts than tap water, likely because the plastic packaging itself sheds particles. Filtering your own tap water with an RO system is typically the lower-microplastic option.