Microplastics have joined lead and PFAS on the list of things households want out of their drinking water — and, like those two, they have attracted a fog of marketing that runs ahead of the certifications. This guide takes the same approach as our other contaminant pages: explain what the contaminant actually is, describe honestly how filtration addresses it, and show you the certified claim to look for — including the exact wording of the one on our own shelf. Because with microplastics, as with PFAS, the gap between “has a carbon filter” and “certified to reduce microplastics” is precisely where shoppers get misled.
What Microplastics Are
Microplastics are tiny pieces of plastic — commonly defined as particles smaller than about 5 millimetres, running down to sizes far too small to see. They are not manufactured to be in water; they arrive there. The main routes, in general terms: larger plastic items breaking down in the environment into ever-smaller fragments; synthetic fibres shed from clothing in laundry and carried through wastewater; and wear particles from products like tyres washing off roads. Because the sources are everywhere and the particles are persistent, microplastics have been detected in many water supplies — which is why the topic moved from environmental research into kitchen conversations.
Two honest caveats belong with the definition. First, “microplastics” names a size range and a material, not one uniform substance — particle sizes, shapes and plastic types vary enormously, and filtration performance varies with them. Second, the health research is still developing: detection science has run ahead of settled conclusions about what typical drinking-water levels mean for health. Neither caveat changes the practical question — what does filtration do about them — but both argue for buying on certification rather than on alarm.
How Filtration Addresses Microplastics
Filtration deals with microplastics by two mechanisms, and the methods below combine them differently. Physical straining: a particle larger than the filter’s pore structure simply cannot pass — this is a size game, and it is why fine, compressed media do well. Adsorption and capture within the medium: as water works through a deep carbon block, particles are caught within the pore structure rather than only at a surface screen.
| Method | How it addresses microplastics | The honest caveat |
|---|---|---|
| Carbon block (fridge / under-sink cartridges) | Fine compressed structure strains particles while carbon adsorbs chemicals — and specific cartridges carry certified microplastics claims (see below) | Only the specific cartridge’s certification counts; an uncertified block has an unproven claim whatever its structure |
| Reverse osmosis | A membrane fine enough to reject dissolved solids also rejects particles far larger than its pores | Wastewater, stripped minerals and maintenance, as with all RO; the system’s own specification is the reference |
| Pitcher and faucet-mount carbon | Looser carbon at gravity or tap flow can catch larger particles | Capability varies widely by model; most carry no certified microplastics claim — check the exact model’s list |
| Sediment-only filters | Strain particles at their micron rating | Catch the larger end of the range; they make no drinking-water contaminant claims and are usually a pre-filter, not the answer alone |
Notice the same pattern as our water filter for lead guide: the mechanism is plausible for a whole category, but the proof attaches to a specific product. The next section shows what that proof looks like.
The Certified Claim to Look For
Microplastics reduction claims on certified cartridges sit under the emerging-contaminants umbrella — NSF/ANSI Standard 401 is the standard associated with emerging compounds, and it is the certification family under which microplastics claims are made for cartridges like ours. As always, the standard number alone is not the claim: what counts is whether the specific cartridge’s own specification names microplastics.
On our shelf, one cartridge’s page does exactly that. The genuine EveryDrop Filter 1, the EDR1RXD1, lists its certifications as CSA B483.1 and NSF/ANSI Standards 42, 53 and 401, and its specification field for microplastics reads, word for word: “Certified to reduce 99% of microplastics.” We quote it exactly because exactness is the point — that is the claim, for that cartridge, and it should not be inflated into “removes all microplastics” by us or anyone.
The discipline cuts the other way too, and our range shows it. The genuine Samsung DA29-00020B we sell is certified to NSF/ANSI 42, 53 and 401 and removes 40+ contaminants per its product page — but its page states no microplastics claim, so we make none for it here. Same store, same certification family, different claim lists. That is why microplastics shoppers should read the exact specification of the exact cartridge, at our store and everywhere else. And if microplastics is one concern among several — taste, lead, chlorine, the whole picture — our map of water filtration systems for homes shows where each filter type sits in a household setup.
Keeping the Claim True: Change on Schedule
A certified reduction describes a cartridge within its rated life. Carbon block captures particles and chemicals on a finite structure; as it loads up over months of use, what it captures falls away while the water keeps flowing and looking fine. The EDR1RXD1 is rated at 6 months and 200 gallons on its product page, and its microplastics claim lives inside that rating. Fitting matters too: a new cartridge should be flushed as its instructions direct — the Filter 1 page specifies flushing about 4 gallons — to clear air and loose carbon fines before the water is used for drinking.
The genuine EDR1RXD1 is $39.99 one-time at Discounted Filter Store, with free US shipping on any order amount — against $59.99 one-time at the official EveryDrop store, or $48 only with a subscription, with Filters Fast shipping free only at $99+ and Discount Filter at $70+. Orders are processed within 1–2 business days and delivered in 3–5 business days via USPS, and unopened filters return within 30 days, free, with a prepaid label.
Frequently Asked Questions
What are microplastics in drinking water? Tiny plastic particles — commonly defined as under about 5 millimetres, down to microscopic sizes — that reach water from breaking-down plastic items, synthetic clothing fibres and other widespread sources. They are a size category covering many plastic types, not a single substance.
Can a fridge filter really reduce microplastics? A specific certified one can: the genuine EveryDrop Filter 1’s product page lists its microplastics specification as “Certified to reduce 99% of microplastics”, alongside NSF/ANSI 42, 53 and 401 certification. The proof is that per-cartridge claim — not the fact that a cartridge contains carbon.
Does every NSF-certified filter reduce microplastics? No. Certifications are granted per product and per claim. Our Samsung DA29-00020B, for example, is certified to NSF/ANSI 42, 53 and 401 with 40+ contaminant reductions on its page — and no microplastics claim stated, so we claim none for it. Read the exact cartridge’s list.
Does reverse osmosis remove microplastics? RO membranes reject particles far larger than their pores as part of rejecting dissolved substances broadly, so RO is commonly counted effective against microplastics. The trade-offs are the usual RO ones — wastewater, stripped minerals and maintenance — and the specific system’s specification is the reference.
Will a filter pitcher handle microplastics? It may catch larger particles in its carbon, but pitcher capability varies widely and most models carry no certified microplastics claim. If microplastics are your target, buy where the reduction is named in the exact model’s certification or specification.
How often must the filter be changed for the microplastics claim to hold? Within its rated life — 6 months or 200 gallons for the EDR1RXD1. The certified reduction describes a maintained cartridge; an exhausted one captures less with every gallon while the water still pours clear.