
Researchers have proven that water in plastic bottles contains more harmful chemicals that cause cancer.
A liter of bottled water contains nearly a quarter of a million pieces of invisible nanoplastic, according to a new study.
Scientists have long assumed that plastic bottles carry large amounts of microplastic particles, but they never knew how much and what kind.
Researchers at Columbia and Rutgers universities in the US used a dual-laser microscope to detect and categorize the particles for the first time.
They took five samples, from three common brands of bottled water, and found that particle levels ranged from 110,000 to 400,000 per liter with an average of about 240,000 particles.
In previous studies scientists have looked at microplastics in water bottles, slightly larger particles ranging from five visible millimeters to one micron.
About 10 to 100 times more nanoplastics than microplastics were detected in bottled water samples, the study found.
Naixin Qian, a chemist from Colombia showed that most of the plastic comes from the bottle itself and the reverse osmosis membrane filter used to keep it out of other pollutants.