About 6 million people in the United States have high fluoride drinking water.2016-08-13 20:53:28 209 ℃
U.S.AAccording to a new scientific study, about 6 million Americans have more than two kinds of high fluoride carcinogens in drinking water.This research is by the Harvard University and the University of California, Berkeley, and other institutions of personnel involved. The study found that in corporate America, military base fire training field, civil airport fire station and sewage treatment factories around, 66 public drinking water supply facilities to provide water, at least a sample contained two high fluorine carcinogens over health and safety standards. These drinking water supply facilities existing users about 6 million people.
This study according to United States Environmental Protection Agency not regulated pollutant monitoring rules ", for 3.6 million water samples in six kinds of fluorine alkyl and perfluoroalkyl group matter content in the test data for the sample. The study found that 4864 of the 33 drinking water supply facilities in the United States, only 194 confirmed to reach the United States Environmental Protection Agency set the minimum standards for the preparation of.
"No regulation of pollutants" contains some toxicity fails to determine the chemical substances, the U. S. environmental protection agency to temporarily set "health guideline". Researchers involved in a sample of about 600 million people drinking water. At the same time the test of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), the highest concentration respectively trillion 349 and parts per trillion 1800, beyond the obvious the EPA established 70 trillion health safety standards.
More than years of production of industrial and commercial products, such as non stick coatings, etc., are widely used in industrial and commercial products for the past 60 years. Previous studies have found that these chemicals are associated with the incidence of cancer, endocrine disorders, high cholesterol and obesity and other diseases. Although some companies have stopped this type of material, but they still exist in the environment, drinking water is one of the main ways they enter the body.
According to the U. S. environmental protection agency from 2013 to 2015 detection data, the researchers by way of Surveying and mapping "back" possible sources of perfluoroalkyl and perfluoroalkyl based material, determined in addition to the manufacturing and use of such substances constituting the primary source of drinking water pollution, the military base fire training field and civil airport fire station drills use foam fire extinguishing agent is an important source of pollution. This kind of fire extinguishing agent is usually used to reduce the surface tension of liquid fuel and increase the surface area of foam diffusion. Sewage treatment plant because of conventional methods can not remove the high fluoride material and cause water pollution.
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