Does bottled water in plastic contain microplastics?
Yes. A 2025 study found microplastics in tested bottled water samples, but it did not prove one weekly dose for every brand.
What's actually in it
Most single-use water bottles are made from PET plastic. Plastic bottles, caps, and packaging lines can add tiny plastic pieces to drinks.
The exact number changes by brand, storage time, heat, and handling. A bottle left in a hot car is not the same as one kept cool.
What the research says
A 2025 study in Environmental Monitoring and Assessment tested bottled drinking water and milk packaging. The researchers found microplastics in the water samples and identified polypropylene, polyamide, polysulfone, and polyethersulfone particles.
The study did not give one clean weekly dose that applies to every family. It did show that bottled water can carry microplastics people drink.
For water at home, use a glass or stoneware cup when you can. Do not store bottled water in heat, and use less single-use plastic when the swap is easy.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Identification and occurrence of microplastics in drinking water bottles and milk packaging consumed by humans daily. | Environ Monit Assess | 2025 |