Does washing clothes put microplastics in your drinking water?

Yes, laundering synthetic clothing is one of the primary ways microplastic fibers enter the water supply. When polyester, nylon, and acrylic garments are washed, they release hundreds of thousands of microfibers per load. These fibers flow through household plumbing into wastewater treatment facilities, which capture some but not all of the particles. Studies show that 40% or more of microfibers pass through treatment and enter rivers, lakes, and oceans.

These microplastics are then found in drinking water sources worldwide. Tap water studies across multiple countries have detected microplastic fibers, with textile-origin polyester being one of the most commonly identified types. Bottled water also contains microplastics, offering no advantage. Home water filters with very fine filtration can reduce but not eliminate microplastics from tap water.

The most effective intervention is upstream: reducing the number of synthetic garments being washed in the first place. Every natural-fiber garment you own is one that does not add persistent plastic particles to the water you eventually drink. ONDU's mission to shift wardrobes toward natural fibers is fundamentally about keeping plastic out of the systems that sustain human health.