Tap water is used every day, but when it comes to tap water, you really don't know it!
1. Tap water contains heavy metals and cannot be drunk
When it comes to tap water, the biggest question is whether the self-boiled water at home can be drunk, let me tell you the answer first, the tap water in the mainland is best not to drink directly, in short, it cannot be drunk directly. The reason for this is not that the heavy metals exceed the standard and the residual chlorine is unsafe, but that the problem is not the tap water itself.
You know, tap water factory through a very complex process, the whole process to go through a number of water quality tests, in strict accordance with the national 2012 implementation of the "drinking water hygiene standards" (GB5749-2006), not only far higher than the World Health Organization standards, and the world's other developed countries are equivalent, even higher than the standards of developed countries, most of the water quality problems are from the secondary pollution in tap water transportation.
2. There is too much scale in tap water, which is unsafe
The main effect of limescale is mainly the calcium and magnesium ions remaining in the water, not the heavy metal ions that are harmful to the human body, and the calcium and magnesium ions will form carbonate solids after heating, and the white precipitate in the kettle is them. Since carbonates are more difficult to dissolve, limescale is also more difficult to remove.
But limescale will not cause any harm to the human body, of course, if you are more concerned, you can use a water softener to soften it, at least your heart will be much more comfortable.
3. Tap water contains chlorine and is unsafe
Most of the waterworks in mainland China are disinfected by chlorine method, and the residual chlorine in the water is the product of the reaction between chlorine and water, which has a slightly pungent odor and is a by-product of the disinfectant.
However, it does not threaten your health, because the residual chlorine of tap water is far less than 0.3mg/L, and the total number of bacteria and coliform bacteria in the drinking water are already in line with drinking water hygiene standards. Although other disinfection methods also exist, they cannot be sustained, and the current tap water pipelines in the mainland are seriously aged, which can easily cause secondary pollution due to the breeding of excessive bacteria. The residual chlorine process, although old, is effective.
4. The TDS of tap water is too high and unsafe
In the process of publicity, many businesses will say that the TDS of tap water is too high and unsafe, but in fact, TDS is the total dissolved solids, which represents how many milligrams of dissolved solids are in a liter of water. The higher the TDS value, the more dissolved matter there is in the water. However, we should also note that some natural minerals that are beneficial to the human body are also "impurities", so this test data should be judged rationally.
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