From time to time, microbiological, chemical and radioactive pollution levels of the waters in the market are controlled by the Ministry of Health. In our country, water is licensed and marketed as drinking water, natural mineral water and spring water. However, in detailed laboratory studies, the water marketed by very few companies is drinkable. In other words, even the waters of many of the well-known brands are far from being safely drinkable in microbiological, chemical and radioactive pollution maintenance. In the recent study, it was found that more than one hundred water brands do not meet one or more of domestic and foreign standards. Approximately thirty types of chemical contaminants were found in these water samples.

In the case of tetrachlorethane and trichloroethane, many water brands have been found to be outside the EPA standards.

The tetrachloroethane compound is an organic chemical and is mostly found in the wastes of factories and dry cleaning companies. It causes liver diseases in humans and increases the risk of cancer. According to EPA standards, at most 0,005 mg per liter of water should be.

Trichloroethane, which is also an organic chemical substance, is mostly found in the wastes of metal degreasing sites, chemical factories and other factories. It causes liver, kidney, nervous system, circulatory and immune system disorders in humans. According to EPA standards, a maximum of 0,2 mg 1,1,1-Trichloroethane and 0,005 mg 1,1,2-Trichloroethane must be used per liter.

EPA is the US Environmental Protection Agency and operates and develops standards in human health and environmental protection.

In the authorized laboratories, tetrachloroethane and trichloroethane analyzes are carried out in drinking water, natural mineral waters and spring waters within the scope of chemical food analyzes. In these studies, standards and test methods issued by national and international organizations are followed. The standard in water analysis is as follows:

• TS 266 Waters - Waters for human consumption