Tap water is water that cannot be directly drunk, filtered, purified and disinfected to become drinking water that meets the standards of food safety regulations. Tap water contains calcium ions, magnesium ions, potassium ions, and chlorine ions that remain when tap water is disinfected with "bleaching powder." Calcium and magnesium ions will eventually precipitate into scale. Because the microorganisms and plankton in the water have been completely killed and filtered, the water body is pure and stable in quality.
Mountain spring water refers to the natural drinking water formed by the natural purification of the mountains. The mountains are filtered and flowed layer by layer, and many minerals are also incorporated. The composition and proportion of minerals, and the different geological structures of different mountains, The composition of minerals will also vary.
Well water is actually groundwater, the water that accumulates on the shallower, impermeable rock formations below the surface. These waters are greatly affected by the surface environment. The composition of water under the surface of the earth is different under different conditions, and some are water that is rich in minerals and suitable for human drinking after being filtered on the surface. Some are polluted water that has been polluted on the surface and penetrated into the ground. This water is harmful to the human body and cannot be used for drinking. Since well water is "hard water" containing more calcium and magnesium, the incidence of gallstones is very high in many areas that drink well water for many years.
Rivers and lakes are also called surface water. In the process of merging into rivers and lakes, the water quality will change in different ways after the surface flows through various environments. Industrial wastewater, domestic sewage, pesticides, chemical fertilizers, etc. produced by human activities will pollute the water environment. Most of the surface water is rich in various microorganisms, bacteria and various chemical substances, and is not suitable for direct drinking. It needs to be purified before it can be used. into drinking water.
