{"id":218,"date":"2026-09-04T05:00:54","date_gmt":"2026-09-04T05:00:54","guid":{"rendered":"https:\/\/www.wellnessqualityinstitute.com\/articles\/best-microplastics-filters-tap-water"},"modified":"2026-09-04T05:44:01","modified_gmt":"2026-09-04T05:44:01","slug":"best-microplastics-filters-tap-water","status":"publish","type":"post","link":"https:\/\/www.wellnessqualityinstitute.com\/articles\/best-microplastics-filters-tap-water","title":{"rendered":"How to Filter Microplastics from Tap Water: What Works"},"content":{"rendered":"<p><em>Written by: Scott Steveson, Specialist, Wellness Quality Institute<\/em><\/p>\n<h2>Key Takeaways<\/h2>\n<ul>\n<li>\n<p>Reverse osmosis, certified solid carbon block filtration, and distillation are the most effective methods for removing microplastics from tap water.<\/p>\n<\/li>\n<li>\n<p>NSF\/ANSI 401 certification is the only reliable way to verify a filter\u2019s microplastic reduction claims; marketing language alone does not confirm performance.<\/p>\n<\/li>\n<li>\n<p>Boiling water followed by a coffee filter can remove up to 90% of microplastics in hard water but remains a partial solution and does not address nanoplastics.<\/p>\n<\/li>\n<li>\n<p>Reverse osmosis is the only widely available method that consistently removes both microplastics and nanoplastics, though it requires more upfront investment and uses more water.<\/p>\n<\/li>\n<li>\n<p>For expert guidance on reducing plastic exposure and achieving plastic-free certification, visit <a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\">The Wellness Quality Institute<\/a>.<\/p>\n<\/li>\n<\/ul>\n<h2>The Direct Answer: What Works Right Now<\/h2>\n<p>The three most effective ways to filter microplastics from tap water are <strong>reverse osmosis<\/strong> (<a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/crystalquest.com\/blogs\/membrane-filtration\/what-is-reverse-osmosis\">membranes with an effective pore size of approximately 0.0001 microns<\/a>, which is smaller than 0.001 microns), <strong>certified solid carbon block filtration<\/strong> (<a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.water2drink.com\/resource-center\/how-it-works-inside-the-multipure-solid-carbon-block-filter.asp\">mechanically filters particles down to 0.5 microns, as certified under NSF\/ANSI Standards 42 and 53<\/a>), and <strong>distillation<\/strong>. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.newswise.com\/pdf_docs\/170863562731743_022824BoiledTapWater.pdf\">Boiling water traps microplastics most effectively in hard water (\u2265120 mg\/L CaCO3), removing at least 80% of nanoplastics and microplastics, but even soft water (&lt;60 mg\/L CaCO3) can remove about 25%<\/a>. Boiling still leaves many particles behind, so it works only as a partial fix.<\/p>\n<figure style=\"text-align: center\"><img decoding=\"async\" src=\"https:\/\/cdn.aigrowthmarketer.co\/1784829388732-c6255482b477.webp\" alt=\"Fragments of plastic suspended in blue water below the surface.\" style=\"max-height: 500px\" loading=\"lazy\"><figcaption><em>Plastic doesn&#8217;t disappear \u2014 it fragments. These secondary microplastics are the breakdown products of everyday objects, and independent research now detects them across the water supply. Detection, though, establishes presence, not absence.<\/em><\/figcaption><\/figure>\n<h2>Filtration Methods That Actually Remove Microplastics<\/h2>\n<h3>Reverse Osmosis (RO): The Gold Standard<\/h3>\n<p>Reverse osmosis pushes water through a semi-permeable membrane, similar to an extremely fine screen, with <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.safewater.org\/fact-sheets-1\/2017\/1\/23\/ultrafiltrationnanoandro\">pores around 0.0001 microns (0.1 nanometers), not 0.001 microns<\/a>. That pore size blocks microplastics, nanoplastics, and most other contaminants including heavy metals and PFAS (per- and polyfluoroalkyl substances, a group of long-lasting industrial chemicals).<\/p>\n<p>RO is the most effective method available for both microplastic and nanoplastic removal. Systems can be verified under <strong>NSF\/ANSI 58<\/strong> for particle reduction, and some models carry <strong>NSF\/ANSI 401<\/strong> certification specifically for microplastic reduction. That certification means an independent third party tested that exact model and confirmed its performance.<\/p>\n<p>The tradeoffs are significant and worth weighing. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.epa.gov\/system\/files\/documents\/2024-11\/ws-products-ro-systems-mini-report.pdf\">Older, conventional reverse osmosis systems typically waste roughly 3\u20134 gallons of water per gallon filtered, while some inefficient units can waste up to 10 gallons per gallon<\/a>. Installation is flexible, since RO systems can sit under the sink, in a basement or garage, or on the counter as plug-in units. RO also removes beneficial minerals, although some systems remineralize the water. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/crystalquest.com\/blogs\/water\/reverse-osmosis-system-cost\">Under-sink reverse osmosis systems typically cost $150\u2013$500 or more, with annual replacement filter costs of about $50\u2013$200 per year, and some sources report higher ranges<\/a>.<\/p>\n<h3>Solid Carbon Block Filtration: The Practical Middle Ground<\/h3>\n<p>Water passes through a compressed block of carbon with <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/nationalwaterfiltrationauthority.com\/carbon-block-filters\/\">pore sizes typically ranging from 0.5 to 10 microns (0.5 microns is the finest rating for cyst reduction)<\/a>. The block physically traps particles, and the carbon surface also adsorbs, or chemically attracts and holds, chlorine and other chemicals that affect taste and odor.<\/p>\n<p>This method works well for microplastics down to the filter\u2019s pore size, yet performance varies widely by design. The key distinctions are:<\/p>\n<ul>\n<li>\n<p>Choose <strong>solid carbon block<\/strong>, not granular activated carbon, which uses loose granules that water can flow around.<\/p>\n<\/li>\n<li>\n<p>Confirm a pore size of <strong>1 micron or less<\/strong>.<\/p>\n<\/li>\n<li>\n<p>Check for <strong>NSF\/ANSI 401 certification<\/strong> for that specific model.<\/p>\n<\/li>\n<\/ul>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/microplasticsapp.com\/blog\/microplastics-water-filters-compared\">Solid carbon block filters rated at 0.5\u20131 \u00b5m do not remove nanoplastics below approximately 0.5 \u00b5m, though they may partially capture larger nanoplastics<\/a>. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10054062\/\">Standard pitcher-style filters that use only granular activated carbon (GAC) and ion exchange are generally not effective for microplastic removal, while tighter carbon block filters or pitchers certified under NSF\/ANSI 401 can remove microplastics down to about 0.5 microns<\/a>. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/midatlanticwater.net\/blogs\/guides\/best-under-sink-water-filter\">Solid carbon block systems for countertop or under-sink use typically cost $50\u2013$300 upfront, with annual replacement cartridge costs of $20\u2013$60<\/a>.<\/p>\n<h3>Ultrafiltration (UF): A Growing Alternative<\/h3>\n<p>Ultrafiltration uses hollow fiber membranes, which are thin tubes with microscopic pores, with pore sizes around 0.01\u20130.1 microns. That range sits between carbon block and reverse osmosis in filtration fineness. Some whole-house UF systems use membranes with pore sizes as fine as 0.015 microns, which block particles, bacteria, and very fine sediment while maintaining good flow rates.<\/p>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.oaepublish.com\/articles\/eceh.2026.03\">Ultrafiltration (UF) membranes can remove microplastics and some nanoplastics, although effectiveness for nanoplastics depends on membrane pore size and UF does not create an absolute barrier<\/a>. Fewer certified models exist compared to RO, and nanoplastic removal remains less proven. Typical countertop UF systems cost about $100\u2013$400.<\/p>\n<h3>Distillation: High Removal, High Energy Use<\/h3>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/factually.co\/fact-checks\/science\/effectiveness-home-distillers-countertop-reverse-osmosis-removing-nanoplastics-vs-industrial-distillation-57fe58\">Distillation removes microplastics and nanoplastics by boiling water and condensing the steam, leaving plastic particles behind in the boiling chamber because they do not vaporize at 100\u00b0C<\/a>. Effectiveness depends on good system design and proper operation, and some nanoplastics may escape capture or reenter the water through plastic components.<\/p>\n<p>Distillation is very effective but slow and energy-intensive. It strips beneficial minerals and often produces flat-tasting water. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/modernize.com\/water-treatment\/types\/water-distillation-system-cost\">Countertop distillers typically cost between $100 and $600, with some budget models under $100 and premium models over $1,000, plus ongoing electricity costs<\/a>.<\/p>\n<h3>The Boiling and Coffee Filter Method: A Helpful Backup<\/h3>\n<p>A <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.acs.org\/pressroom\/presspacs\/2024\/february\/want-fewer-microplastics-in-your-tap-water.html\">2024 study published in <em>ACS ES&amp;T Water<\/em><\/a> found that <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/pubs.acs.org\/doi\/full\/10.1021\/acs.estlett.4c00081\">boiling hard water (containing &gt;120 mg\/L calcium carbonate) causes polystyrene, polyethylene, and polypropylene microplastics to become encrusted with limescale (calcium carbonate), removing at least 80% of particles sized 0.1\u2013150 \u03bcm, which a simple coffee filter can then trap<\/a>. The study reported up to 90% removal in very hard water and about 25% removal in soft water.<\/p>\n<p>This method depends on limescale formation, so it only works with hard water. Soft water gains very little benefit from boiling. The process also leaves other contaminants in place, and the coffee filter step remains essential because boiling alone does not remove particles. Treat this as a science-backed trick and a partial measure. Test your water hardness first and rely on certified filtration for your main protection.<\/p>\n<h2>Comparison Table: How the Main Methods Stack Up<\/h2>\n<p>The table below summarizes pore size, microplastic removal ability, and typical costs so you can quickly compare your options.<\/p>\n<table style=\"min-width: 100px\">\n<colgroup>\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>Method<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>Pore Size<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>Microplastic Removal<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>Approximate Cost<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Reverse Osmosis<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>~0.0001 microns (0.1 nm)<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Yes, microplastics and nanoplastics (look for NSF\/ANSI 58 or NSF\/ANSI 401)<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>$150\u2013$500+ system; $50\u2013$200\/yr filters<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Solid Carbon Block (\u22641 micron)<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>0.5\u201310 microns<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Yes for microplastics if NSF\/ANSI 401 certified; not nanoplastics<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>$50\u2013$300 system; $20\u2013$60\/yr filters<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Ultrafiltration<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>0.01\u20130.1 microns<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Yes for microplastics; partial for larger nanoplastics<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>$100\u2013$400 system<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Distillation<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>N\/A (boiling + condensation)<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Yes, microplastics and nanoplastics<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>$100\u2013$600 system + electricity<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.acs.org\/pressroom\/presspacs\/2024\/february\/want-fewer-microplastics-in-your-tap-water.html\">Boiling + Coffee Filter<\/a><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>~20 microns (coffee filter)<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Partial, up to 90% in hard water; ~25% in soft water; not nanoplastics<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Minimal<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>NSF\/ANSI 401 Certification: How to Read the Label<\/h2>\n<p><strong>NSF\/ANSI 401<\/strong> is a certification standard from NSF International and the American National Standards Institute. In plain language, <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.nsf.org\/consumer-resources\/articles\/emerging-drinking-water-contaminants\">it means an independent organization tested a specific filter model and confirmed it reduces certain emerging contaminants, such as pharmaceuticals, herbicides, and pesticides, to defined levels<\/a>. The same process can verify microplastic reduction claims for that model.<\/p>\n<figure style=\"text-align: center\"><img decoding=\"async\" src=\"https:\/\/cdn.aigrowthmarketer.co\/1784829434095-0fc8fbcf29fa.webp\" alt=\"Scientists in white coats working with samples and microscopes in a laboratory.\" style=\"max-height: 500px\" loading=\"lazy\"><figcaption><em>Only a small number of laboratories can genuinely test for microplastics, and capability varies by instrument and method. WQI reviews a company&#8217;s existing third-party laboratory data against a defined standard \u2014 it does not run the tests itself.<\/em><\/figcaption><\/figure>\n<p>Certification always applies to a specific model, not an entire brand. A company may sell one certified filter and several uncertified versions. A label that says \u201cremoves microplastics\u201d without NSF\/ANSI 401 certification remains a marketing claim without independent proof.<\/p>\n<p>Use this simple process to check whether your filter is certified:<\/p>\n<ol>\n<li>\n<p>Visit the <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.nsf.org\">NSF International website<\/a> and open the water filter certification database.<\/p>\n<\/li>\n<li>\n<p>Search by brand name and model number.<\/p>\n<\/li>\n<li>\n<p>Look for \u201cmicroplastic reduction\u201d or \u201cNSF\/ANSI 401\u201d in the listing.<\/p>\n<\/li>\n<\/ol>\n<p>Certification gives you the strongest signal of real performance. If a filter lacks it, treat the microplastic claim as unverified.<\/p>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\"><strong>Explore ways to reduce plastic exposure or pursue plastic-free certification for your products.<\/strong><\/a><\/p>\n<h2>Brita and Microplastics: What Their Filters Actually Do<\/h2>\n<p>Standard Brita pitchers and faucet filters use activated carbon filtration, which targets chlorine, taste, and odor rather than physically trapping microplastic particles. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/waterfilterguru.com\/what-does-brita-filter-out\/\">Brita\u2019s standard pitcher filters (for example, OB03) are not NSF\/ANSI 401 certified for microplastic reduction, and Brita does not claim microplastic removal for these products. Brita\u2019s Elite (OB06) and Total360 models do hold NSF\/ANSI 401 certifications for microplastics reduction<\/a>.<\/p>\n<p>If you want a pitcher-style filter that reduces microplastics, choose one with a <strong>0.5-micron filter<\/strong> and NSF\/ANSI 401 certification, or consider a countertop ultrafiltration system. Some newer pitcher lines may offer stronger filtration, yet you still need to verify certification before assuming any pitcher removes microplastics.<\/p>\n<h2>How to Match a Filter to Your Home and Budget<\/h2>\n<p>Your best choice depends on budget, living situation, and how much removal you want.<\/p>\n<ul>\n<li>\n<p><strong>Maximum removal with under-sink space:<\/strong> Choose a reverse osmosis system with NSF\/ANSI 401 certification. RO is the only common method that reliably removes nanoplastics as well as microplastics.<\/p>\n<\/li>\n<li>\n<p><strong>Renting or need portability:<\/strong> Consider a countertop ultrafiltration system or a certified solid carbon block filter. Look for NSF\/ANSI 401 certification and a pore size of 1 micron or less.<\/p>\n<\/li>\n<li>\n<p><strong>Very tight budget:<\/strong> Use a certified carbon block pitcher as a starting point and understand its limits. It will not remove nanoplastics, and you must verify certification for that exact model.<\/p>\n<\/li>\n<li>\n<p><strong>Hard water and want a low-cost supplement:<\/strong> Use the boiling and coffee filter method as an add-on. It can remove up to 90% of microplastics in hard water but still leaves nanoplastics and other contaminants.<\/p>\n<\/li>\n<\/ul>\n<p>Before buying any filter, check three details: third-party certification (NSF\/ANSI 401), pore size (1 micron or less for microplastic reduction), and annual replacement filter costs.<\/p>\n<h2>Everyday Habits to Cut Microplastic Exposure<\/h2>\n<p>Filtration makes the biggest difference, and daily choices also help reduce exposure.<\/p>\n<ul>\n<li>\n<p><strong>Skip bottled water.<\/strong> A <a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.frontiersin.org\/journals\/chemistry\/articles\/10.3389\/fchem.2018.00407\/full\">2018 study by Mason et al. in <em>Frontiers in Chemistry<\/em><\/a> found microplastics in 93% of bottled water samples, at roughly twice the concentration found in tap water. The most common polymer was polypropylene from bottle caps, which points to the packaging as a major source.<\/p>\n<\/li>\n<li>\n<p><strong>Use glass or stainless steel containers<\/strong> for drinking water and food storage, especially for hot liquids.<\/p>\n<\/li>\n<li>\n<p><strong>Avoid heating food in plastic containers.<\/strong> Heat speeds up plastic breakdown and increases particle shedding.<\/p>\n<\/li>\n<li>\n<p><strong>Reduce plastic in your kitchen.<\/strong> Choose glass storage containers, skip plastic wrap when possible, and favor fresh foods over heavily plastic-packaged options.<\/p>\n<\/li>\n<\/ul>\n<h2>The Bottom Line on Microplastic Filtration<\/h2>\n<p>Filtering microplastics from tap water is realistic when you choose proven methods and verified products. Reverse osmosis offers the strongest protection and remains the only widely available method that consistently removes nanoplastics. Certified solid carbon block filtration works well for microplastics when you confirm NSF\/ANSI 401 certification for the specific model. Distillation is highly effective yet energy-intensive, and the boiling plus coffee filter method only helps with hard water and functions as a backup strategy.<\/p>\n<p>The most reliable step is checking for third-party certification instead of trusting marketing language. If a filter does not carry NSF\/ANSI 401 certification for microplastic reduction, treat any claim as unproven.<\/p>\n<p>The Wellness Quality Institute (WQI) supports brands that want to back up their water product claims with solid data through its Plastic-Free Pathway Verification program. <a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\">Learn about Plastic-Free Pathway Verification and how it supports credible microplastic claims.<\/a><\/p>\n<h2>Frequently Asked Questions<\/h2>\n<h3>Will a Brita filter remove microplastics?<\/h3>\n<p>Standard Brita pitchers use activated carbon filtration, which improves taste and removes chlorine but does not reliably trap microplastic particles. As noted earlier, Brita\u2019s standard pitcher filters lack NSF\/ANSI 401 certification, while its Elite and Total360 models hold that certification. If microplastic removal is your goal, choose a filter with a pore size of 1 micron or less and confirmed NSF\/ANSI 401 certification for that specific model.<\/p>\n<h3>What is the best water filter for microplastics?<\/h3>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.mdpi.com\/1420-3049\/31\/4\/613\">Reverse osmosis ranks among the most effective methods for removing microplastics and nanoplastics, with membranes around 0.0001 microns (0.1 nm) or less than 2 nm, achieving over 99% removal when the membrane and seals remain intact<\/a>. For a lower-cost approach, a solid carbon block filter with NSF\/ANSI 401 certification and a pore size of 1 micron or less will reduce microplastics, though it will not capture nanoplastics. Ultrafiltration systems sit between these options in cost and effectiveness. In every case, verify certification for the exact model, not just the brand.<\/p>\n<h3>Does boiling water remove microplastics?<\/h3>\n<p>Boiling helps only under specific conditions. As described earlier, a 2024 study showed that boiling hard water causes microplastics to become coated with limescale so a coffee filter can trap them. In soft water, the same process removes only about 25% of particles. Boiling alone, without the coffee filter step, does not remove enough particles. This method also leaves nanoplastics and other contaminants in place, so treat it as a supplement rather than your main strategy.<\/p>\n<h3>What is NSF\/ANSI 401 certification?<\/h3>\n<p>NSF\/ANSI 401 is an independent certification standard that confirms a specific water filter model reduces emerging contaminants. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.nsf.org\/consumer-resources\/articles\/emerging-drinking-water-contaminants\">These contaminants include pharmaceuticals, herbicides, and pesticides, which the filter must reduce to defined levels<\/a>. \u201cNSF\/ANSI 401 certified\u201d means an independent organization tested that exact model and confirmed its performance claims. Certification is model-specific, so one certified product in a brand\u2019s lineup does not guarantee that other models are certified. Always confirm details in the NSF International database by brand name and model number.<\/p>\n<h3>Are there water filters that remove nanoplastics?<\/h3>\n<p><a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.mdpi.com\/1420-3049\/31\/4\/613\">Reverse osmosis membranes, with pore sizes below 2 nanometers, can achieve over 99.9% removal of nanoplastics, making RO one of the most effective membrane-based methods, although performance depends on membrane integrity and system design<\/a>. <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.mdpi.com\/2077-0375\/13\/7\/683\">Ultrafiltration systems with pore sizes of 0.01\u20130.1 microns can remove larger nanoplastics, but effectiveness depends on particle size relative to the membrane pores, and smaller nanoplastics may pass through<\/a>. Solid carbon block filters and pitcher-style filters generally do not remove nanoplastics.<\/p>\n<h3>Is bottled water safer than tap water for microplastics?<\/h3>\n<p>Research points in the opposite direction. A 2018 study found microplastics in 93% of bottled water samples, at roughly twice the concentration found in tap water. The most common polymer was polypropylene from bottle caps, which suggests the packaging itself as a major contamination source. Bottled water does not reliably reduce microplastic exposure, and filtered tap water from a certified system is usually the better choice.<\/p>\n<h3>How do I know if my current filter is certified for microplastic removal?<\/h3>\n<p>Visit the <a target=\"_blank\" rel=\"noindex nofollow\" href=\"https:\/\/www.nsf.org\">NSF International website<\/a> and use the water filter certification database. Search by your filter\u2019s brand name and model number, and look for \u201cmicroplastic reduction\u201d listed under NSF\/ANSI 401. If your filter model does not appear in the database with a microplastic reduction claim, the manufacturer\u2019s marketing language has not been independently verified.<\/p>\n<h2>Read Next<\/h2>\n<ul>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\/articles\/microplastics-in-water\">Microplastics in Water: Risks, Filters &amp; Smarter Choices<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\/articles\/national-water-quality-month-microplastics\">Microplastics in Water: What Brands Need to Know<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\/articles\/microplastics-drinking-water-testing\">Microplastics in Drinking Water: Testing Explained<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\/articles\/water-quality-month-microplastics\">Microplastics Testing Limits and How to Judge the Evidence<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https:\/\/www.wellnessqualityinstitute.com\/articles\/microplastics-in-bottled-water\">Microplastics in Drinking Water: What the Science Says<\/a><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The Wellness Quality Institute breaks down which water filters actually remove microplastics. Find the right filter for your home and budget.<\/p>\n","protected":false},"author":117,"featured_media":217,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-water-quality"],"_links":{"self":[{"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/posts\/218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/comments?post=218"}],"version-history":[{"count":1,"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/posts\/218\/revisions"}],"predecessor-version":[{"id":224,"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/posts\/218\/revisions\/224"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/media\/217"}],"wp:attachment":[{"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/media?parent=218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/categories?post=218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wellnessqualityinstitute.com\/articles\/wp-json\/wp\/v2\/tags?post=218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}