Can filtered water be drunk directly?

It is said that water is the source of life. From this sentence, we can see how important water is to us. Although people’s safety awareness has increased, everyone has paid more and more attention to the requirements of water quality and water safety. Now many families have installed water filtering equipment. In the eyes of many people, only such water can be safely drunk. Although drinking water is a very common thing, there are also many things that need attention.

Can filtered water be drunk directly? Whether it is spring water or mountain stream water, it is greatly affected by external environmental factors. The water quality is unstable and easily polluted. For example: when it rains, mud and sand in the surrounding environment are washed into the water source, causing the water quality to be turbid; fertilizers and pesticides are sprayed on surrounding farmland and mountains, which can cause pesticide pollution in the water due to infiltration; surrounding human and animal activities can cause fecal pollution; some water sources are prone to drying up during the dry season, etc. The treated spring water can be drunk directly, so from the perspective of health and safety,

Clearness and sweet taste cannot be used as a standard for drinkability. The domestic drinking water supply project is a complex scientific project, which has many requirements. First of all, the water source must not only have good water quality and abundant water, but also be easy to maintain and manage. Secondly, the water source should also be processed by coagulation, sedimentation, filtration, disinfection and other processes before being sent to the faucet at the end of the pipe network through water pipes before it can be used. Which water cannot be drunk directly? Raw water: Raw water contains various bacteria, viruses and zoonotic parasites that are harmful to the human body. Drinking raw water can easily cause acute gastroenteritis, viral hepatitis, typhoid, dysentery and parasitic infection. Especially nowadays, large and small rivers, reservoirs, and well water are all polluted to varying degrees by factory waste liquid, domestic wastewater, pesticide residues, etc., and drinking raw water is more likely to cause disease. Aged water: commonly known as "dead water", which is water that has been stored for a long time without moving. For minors, drinking this kind of water regularly will significantly slow down cell metabolism and affect physical growth and development; for middle-aged and elderly people, it will accelerate aging; the incidence of esophageal cancer and gastric cancer is increasing in many places. According to medical research, this may be related to long-term drinking of aging water. Relevant data show that the toxic substances in aged water also increase with the increase of water storage time.

Thousands of boiled water: Thousands of boiled water is water that has been boiled on the stove overnight or for a long time, as well as water that has been boiled repeatedly in an electric water heater. Because this water has been boiled for too long, it contains high levels of non-volatile substances, such as calcium, magnesium, heavy metals, and nitrite. Drinking this kind of water for a long time will interfere with the gastrointestinal function of the human body, causing temporary diarrhea and abdominal distension; the toxic nitrite can also cause hypoxia in the body, and in severe cases it can cause coma, convulsions, and even death. Steamer water: Steamer water is the leftover water from steaming buns, etc., especially steamer water that has been used repeatedly, which has a high concentration of nitrite. Drinking this kind of water frequently, or using this water to cook porridge, can cause nitrite poisoning; scale often enters the human body with water, and can also cause diseases of the digestive, nervous, urinary and hematopoietic systems, and even cause premature aging. Unboiled water: The tap water that people drink has been treated with chlorination and sterilization. Thirteen harmful substances can be separated from chlorine-treated water, among which halogenated hydrocarbons and chloroform are carcinogenic and teratogenic. When the water temperature reaches 90℃, the halogenated hydrocarbon content increases from 53 micrograms per kilogram to 177 micrograms per kilogram, which is twice the national drinking water hygiene standard. Experts point out that drinking unboiled water increases the likelihood of developing bladder cancer and colorectal cancer by 21% - 38%. When the water temperature reaches 100℃, these two harmful substances will be greatly reduced as the steam evaporates. If it continues to boil for 3 minutes, it will be safe to drink.

Re-boiled water: Some people are accustomed to re-boil the remaining warm water in the thermos before drinking it, in order to save water, coal (gas) and time. But this kind of "savings" is not worth it. Because the water is boiled again and again, the water evaporates again, and the nitrite will increase. If you drink this kind of water often, the nitrite will accumulate in the body and cause poisoning. https://static.cndzys.com/20161202/18f9e9aa910a3f84eecbe87f5bae1cb3.jpg

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