Do water pitcher filters remove microplastics from tap water?

What's actually in it

Tap water travels through miles of pipes before reaching your glass. Along the way, it picks up tiny plastic fragments called microplastics. These particles come from crumbling PVC pipes, degrading water treatment infrastructure, and environmental contamination. They're so small you can't see them, but they're in most tap water tested around the world.

Many families use water pitcher filters (like Brita or PUR) hoping to clean up their water. These pitchers typically use activated carbon and ion exchange resin to reduce chlorine, lead, and bad tastes. But microplastics are a different challenge.

What the research says

A 2026 review in Water Res examined how microplastics enter and persist in water supply systems. The study found that microplastics are present at every stage of the water supply chain, from source water to treatment plants to the pipes in your home. Standard water treatment processes reduce but don't eliminate them.

The problem with pitcher filters is pore size. Most activated carbon filters have pores that are too large to trap the smallest microplastic particles. They may catch some of the bigger fragments, but particles smaller than 10 microns often pass right through.

For better protection, look for filters rated to remove particles down to 1 micron or smaller. Reverse osmosis systems and certain ceramic filters are more effective. Some newer pitcher filters now advertise microplastic removal, but check for independent lab testing before trusting the claim.

Glass or stainless steel water bottles are also better than plastic ones, which can add their own microplastics to the water inside.