Researchers from Columbia University and Rutgers University found roughly 240,000 detectable plastic fragments in a typical liter of bottled water. https://www.npr.org/2024/01/10/1223730333/bottled-water-plastic-microplastic-nanoplastic-study
https://www.npr.org/2024/01/10/1223730333/bottled-water-plastic-microplastic-nanoplastic-study