Does the title sound terrible? But the fact is that the pollution is serious and the water quality is bad. Even if you boil the water, you will have to drink a lot of heavy metals, scales and other substances. Let's take a look at what can the water purifier filter out for you?
1. Rust: Water is transported by galvanized iron pipes. Water and iron are oxidized to form red iron oxide. Further oxidation produces black ferric oxide. Pipes in new buildings are more susceptible to oxidation. Almost everyone has this experience. The faucet is turned on for the first time every morning, and the red material in the effluent is rust.
Although iron is an essential element of the human body, as one of the indicators of drinking water, the iron content per liter of water must not exceed 0.3 mg. If the naked eye can distinguish the color of the rust in the water, or can taste the rust, then the iron content in the water is greatly exceeded. Excessive iron content, not only the perception, poor taste, long-term drinking, will increase the burden on the kidneys, leading to disorders of the endocrine system, high blood pressure and other diseases.
2. Lead and other heavy metals: There will be many heavy metals such as lead dissolved in the water during transportation. Long-term drinking will increase the burden on the liver and kidneys of the human body, and easily cause diseases of the liver, kidney, heart and nervous system.
3. Chlorine: Chlorine is a strong oxidizing agent with a pungent odor and a mouthfeel. Chlorine is a tap water disinfectant widely used internationally. The residual chlorine is chlorinated and disinfected. After a certain period of contact, the amount of chlorine remaining in the water. According to international requirements, the safety of residual chlorine is that the end of the pipe network (at the household tap) should be kept at 0.05 mg / liter of water to control the growth of bacteria in the transportation process, so the city supply tap water contains residual chlorine.
4. Bacteria: Whether it is surface water or groundwater as a source of water, bacteria and E. coli in tap water can be said to be ubiquitous. The water contains nutrients, and the water has relative thermal stability, thus providing an excellent environment for the growth and reproduction of various bacteria. Even if the water contains a very small amount of nutrients, bacteria and viruses will survive and breed. (Hou Yuru)
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