Water filters certified for microplastics: every NSF/ANSI 401 listing

Yes, and a certifier listing is how you check. In our database, 52 filters are listed to NSF/ANSI 401 for microplastics: in the lab each reduced particles 0.5 to under 1 micrometer by at least 85%. Culligan Faucet Mount Filter CULFMWH is the cheapest at $27.49 (checked Oct 16, 2026). A brand's own claim without a listing isn't the same test. The contaminants or other substances removed or reduced by this water treatment device are not necessarily in your water.

Reverse osmosis isn't required for the listing. Of the 52 listed filters, 8 are reverse osmosis (Brondell Capella RC250 Reverse Osmosis, AquaTru Carafe Countertop RO, AquaTru Under Sink Reverse Osmosis, AquaTru Classic Countertop RO, Aquasana SmartFlow Reverse Osmosis, Pentair FreshPoint GRO-575 5-Stage Reverse Osmosis, Coway Modern Countertop RO (P-300L) and Coway Prime Countertop RO (P-6320L)) and 44 are not, including the Brita Denali Pitcher with Elite Filter. AquaTru's data sheet reports 96.48% average reduction for the Under Sink system, with 1,400,000 particles per milliliter going in.

The Elite filter does. WQA lists the Brita Denali Pitcher with Elite Filter ($35.99) to NSF/ANSI 401 for microplastics. The Brita Denali Pitcher with Standard Filter ($22.99) has no 401 listing. Its filter is listed for chlorine and a few metals only. Prices checked Oct 16, 2026.

Particles 0.5 to under 1 micrometer, and the filter has to reduce them by at least 85%. The starting count differs between data sheets: AquaTru's data sheet lists 1,400,000 particles per milliliter, Aquasana's at least 10,000. The listing shows the pass, not the count in your tap.

Of the 52 listed filters, 26 also hold a PFAS listing. The cheapest is the Culligan Faucet Mount Filter CULFMWH at $27.49 (checked Oct 16, 2026). 3M Aqua-Pure Filtrete Maximum Under Sink System (3US-MAX-S01), A. O. Smith AO-MF Direct Connect Faucet Filter, Everpure H-104 Drinking Water System, Frigidaire WF3CB PureSource 3 Water Filter, Bosch UltraClarity Pro Water Filter (BORPLFTR55), Waterdrop ED01 Electric Water Filter Dispenser, BOROUX Legacy 3-Gallon, Everpure EF-1500 Full Flow Drinking Water System, Everpure H-300-NXT Drinking Water System, Brita Elite Advanced Faucet System, everydrop Filter 1 EDR1RXD1, everydrop Filter 4 EDR4RXD1, Frigidaire ULTRAWF PureSource Ultra Water Filter, everydrop Filter 2 EDR2RXD1, LifeStraw Home 7-Cup Glass Pitcher, Doulton QT Under Counter System (Ultracarb), 3M Aqua-Pure 3MFF100 Full Flow Under Sink System, Doulton British Berkefeld Duchess 1.58-Gallon, Doulton British Berkefeld Duke 2.25-Gallon, Everpure H-300 Drinking Water System, Brita Elite Faucet System, Brita Denali Pitcher with Elite Filter, Brondell Cypress H630 Countertop, 3M Aqua-Pure 3MDW301-F Under Sink System with Faucet, 3M Aqua-Pure AP-DWS1000 Under Sink System and Coway Prime Countertop RO (P-6320L) have a microplastics listing but no PFAS listing. Use the "+ PFAS listing" filter above the table. Every filter with a PFAS listing, microplastics or not, is on filters certified for PFAS.

Their microplastics claims come from the brands, not from a certifier listing that names microplastics. LARQ Advanced Under Sink Filter, Clearly Filtered Water Pitcher and Epic Water Filters Pure XP Water Filter Pitcher say they reduce microplastics. We found no listing that covers it (checked October 13–14, 2026). When a listing appears, the model goes into the table.