Microplastics in Tap Water: A Plain-English Guide to What’s Actually There

Microplastics are plastic fragments smaller than 5 millimeters, and the ones found in drinking water are usually 1–5 microns or smaller — far thinner than a human hair, which runs about 70 microns. Peer-reviewed studies have detected them in tap and bottled water worldwide, but the health evidence is still developing. A microplastics water filter that physically excludes particles — sub-micron mechanical media or reverse osmosis — is the reliable way to reduce them. Key Takeaways — Do You Actually Need a Microplastics Filter? The particles are real and they’re in most water we’ve tested for them — that part isn’t in dispute. What’s unsettled is whether the doses in drinking water hurt you. At the moment, the WHO’s stance is that there is no definitive proof that microplastics pose a significant risk to your health. Granted, this is not saying they’re definitively safe. If you want to reduce microplastics, ignore marketing adjectives and look at one number: the absolute micron rating. Sub-micron mechanical or RO removes them. A loose carbon pitcher mostly doesn’t. KNOW YOUR WATER FIRST Before you buy a microplastics filter, see what’s actually in your supply. Enter your ZIP and we’l...