High levels of persistent chemical compounds have been found in the drinking water of several major cities in China. They were identified in a study conducted by a team of experts from Tsinghua University. The experts believe that drinking water needs urgent treatment, and industrial plants that emit hazardous chemicals need to be reduced and controlled on a massive scale.
PFAS is a special group of chemicals found in drinking water. They are traditionally used in the manufacture of coatings that are resistant to heat, oil and grease, such as clothing, adhesives, packaging materials, resistant non-stick surfaces.
They are long-lasting and keep well in the environment without degradation. For humans, such chemicals are very dangerous. They cause hormonal imbalance, cancer and other diseases. But in many regions of the world, including China, regular monitoring of drinking water for the content of PFAS in it is not carried out.
The researchers analyzed the results of 30 available drinking water studies, including 526 samples from 66 Chinese cities with a total population of 452 million. According to researcher Jun Huang, huge amounts of perfluorooctanoic acid and perfluorooctanesulfonic acid have been identified in the water.
Their use in many countries of the world has been discontinued since 2002, but China still produces chemicals based on them. As a result, there is a high risk of contamination of soil, ground and underground waters and other areas of the environment.
But of much greater concern is the presence of hazardous chemicals in drinking water. It has a direct toxic effect on millions of people. In most cities with hazardous drinking water, there is intense industrial activity, in particular the production of fluoropolymers with a high population density in these regions.