Why can t you drink tap water when it s boiled?

It's so hot, you have to wait until it's cold before you can drink it.

You can drink it, if you simply ask for clean water, I'm afraid that even the RO membrane water machine will filter it.

Can you boil tap water and drink it directly?

Since tap water is chlorinated, chlorine combines with residual organic matter in the water to produce halogenated hydrocarbons, chloroform and other carcinogenic compounds. Chloroform is also a kind of carcinogenic compound, so boiled water cannot be drunk directly, and it becomes warm boiled water after the temperature drops.

Tap waterTap water refers to the water produced by the tap water treatment plant after purification and disinfection that meets the corresponding standards for people's life and production.

Chlorination method is mostly used for tap water disinfection, and the main purpose of chlorination of public water supply is to prevent water-borne diseases, which has been popularized for more than 100 years, and has relatively complete production technology and equipment.

In addition to chlorine, chlorine dioxide and ozone are used to disinfect tap water, and the use of alternative disinfectants can reduce the amount of harmful substances generated and improve treatment efficiency.

If the tap water is properly disinfected and not contaminated, it can be boiled and drinkable.

Nitrite in water is not produced in a vacuum, but is generally converted from the original nitrate in the water. There is very little nitrate in qualified drinking water; However, if the water source is contaminated with nitrogenous organic matter, nitrate levels may increase. Generally speaking, the reason for the increase of nitrite caused by repeated heating of drinking water is mainly the increase of nitrite concentration due to water evaporation and concentration, but the total amount does not increase; Another possibility is that some nitrates are heatedly broken down into nitrites.

China's sanitary standards for bottled water stipulate that the nitrite content in water shall not exceed 2 micrograms per liter.

Water cannot be drunk as soon as it is boiled.

Because our tap water is chlorinated, chlorine combines with residual organic matter in the water to produce halogenated hydrocarbons, chloroform and other carcinogenic compounds.

Jiang Weibo, a professor at the College of Food Science and Nutritional Engineering of China Agricultural University, suggested that when boiling water, you might as well take three steps:

1. First of all, take the tap water out and leave it for a while before burning;

2. Open the lid of the pot when the water is about to boil;

3. Finally, after the water is boiled, wait for 3 minutes and then turn off the fire, which can reduce the chlorine content in the water to the safe drinking standard, which is real boiling water.

Boiled tap water is drinkable, but it is important to note that water cannot be drunk as soon as it is boiled. Because the daily tap water is chlorinated, chlorine combines with the residual organic matter in the water to produce halogenated hydrocarbons, chloroform and other carcinogenic compounds. When boiling water, it is best to take the tap water out first and leave it for a while before boiling;

After boiling water, it is best to wait until the water is boiling for 3 minutes before turning off the heat, so that the chlorine content in the water can be reduced to the safe drinking standard, which is real boiled water.

Tap water is boiled and can be drunk.

Tap water refers to the water produced by the tap water treatment plant after purification and disinfection that meets the corresponding standards for people's life and production. Domestic water is mainly absorbed from rivers, lakes, groundwater and surface water through the water intake pumping station of the water plant, which is treated by the waterworks in accordance with the relevant health standards for domestic drinking water, through precipitation, disinfection, filtration and other technological processes, and finally transported to various users through the water distribution pumping station.

The place where the water company leaves the factory can be monitored, but the place from the water plant to the taps of individual users is a blind spot. The most reassuring, *** and most economical is to drink boiled tap water, which is the best.

You can drink tap water and boil it to cool, it becomes boiled water, also known as cool boiled water, frozen boiling water, and it is the most popular edible water in ordinary life. It is light and tasteless, extremely ordinary, but it has a very important conditioning effect on the physiological mechanism of the human body. For middle-aged and elderly people, it can not only dilute the blood, reduce blood viscosity, promote blood circulation, but also reduce the risk of blood clots, and prevent the occurrence of cardiovascular and cerebrovascular diseases during the "peak period" of heart disease. For young people, it can quench thirst and diuretic effect on the reduction of body water due to physiological emission after sleeping at night, and can also make ** smooth and delicate.

It is drinkable, generally speaking, tap water can not be drunk directly, because tap water contains many ions, such as sodium ions, potassium ions, etc., including some bacteria, so, tap water to boil before drinking, when the water is boiled to 100 degrees Celsius (that is, boiling), bacteria will die due to too high temperature, harmful ions in the water become precipitated or rust, and the remaining ions can be absorbed by the human body (is harmless), so when the tap water is boiled, you can drink with confidence

Tap water disinfection is made of chlorine, chlorine is a toxic gas, can kill bacteria, but its solubility in the water will decrease with the increase of temperature, that is, the higher the temperature of the water, the less chlorine it contains, so the tap water should be boiled to drink, it is best not to drink raw, and the sediment in the water is because of the gum added when the water plant first treated the water, which can precipitate the impurities in the water. It seems that your tap water there is not well treated, and it is better to see a doctor if the stomach problem is aggravated, and the tap water should still be boiled and drunk.

Can you boil tap water and drink it directly?

It is drinkable, generally speaking, tap water can not be drunk directly, because tap water contains many ions, such as sodium ions, potassium ions, etc., including some bacteria, so, tap water to boil before drinking, when the water is boiled to 100 degrees Celsius (that is, boiling), bacteria will die due to too high temperature, harmful ions in the water become precipitated or rust, and the remaining ions can be absorbed by the human body (is harmless), so when the tap water is boiled, you can drink with confidence

Can you boil tap water and drink it directly?

In general, tap water can be boiled to drink, and high temperatures can kill some bacteria and viruses in the water. However, if the tap water is polluted by the environment, the heavy metals and some harmful substances in the water will not disappear because the water is boiled, so it is best to pass through the water purifier and then boil the water to drink.

The tap water at home has a lot of impurities and bacteria. Boiling tap water can kill most bacteria, but there are still a lot of impurities remaining, and long-term drinking has a great impact on human health. Tap water contains a large amount of impurities and sediments, because most of the domestic water pipeline network uses galvanized iron pipes, and the lead content of the material is too high, resulting in high lead content in the water quality.

In addition, the water pipes are in disrepair and damaged, which may also cause secondary pollution to the quality of the tap water.

It must be boiled and drunk, especially if there is a filtered gas in it, and now the tap water has scale, it must be filtered before drinking, or the scale must be floated away and then drunk.

Water cannot be drunk as soon as it is boiled. Because tap water is chlorinated, chlorine combines with residual organic matter in the water to produce halogenated hydrocarbons, chloroform and other carcinogenic compounds.

When boiling water, you may wish to take three steps: first, take the tap water out and leave it for a while before boiling; When the water is about to boil, open the lid of the kettle; Finally, if the water is boiled and then turned off after 3 minutes, the chlorine content in the water will be reduced to the safe drinking standard, which is truly "boiling water".

You can drink it.

Tap water is water that has been disinfected and used for people's livelihood and travel. Under normal circumstances, after disinfection treatment, tap water can reach the standard of direct drinking water, and tap water also has a sterilization effect after heating and boiling, which has basically removed pathogenic microorganisms and excessive calcifications, and is normal and healthy drinking water.

However, it is recommended to drink tap water on the same day after boiling, because if it is left for a few days, it may grow microorganisms or fall into dust, which can have adverse effects on the body. However, if the pipes used to transport tap water are aging and rusty, for the sake of health and safety, it is recommended to install a water purification device for tap water, which can better filter the tap water and make the water quality in the body cleaner.

National standard for tap water

From July 1, 2007, the "Sanitary Standards for Drinking Water" (hereinafter referred to as the "New Standards") jointly revised and promulgated by the National Standards Committee and the Ministry of Health will be officially implemented, and all waterworks will implement stricter testing standards. The 106 indicators in the new standard are divided into two categories: routine inspection items and non-routine inspection items.

Among them, there are 42 routine inspection items, which must be uniformly verified in all places; There are 64 non-routine inspection items, and the specific implementation date shall be determined by the provincial people** according to the actual situation, but the implementation of all indicators shall not be later than July 1, 2012.

Whether tap water is boiled or not is drinkable depends on the situationTap water is water that has been disinfected for people's daily use. In general, tap water is sterilized by a treatment plant and can be drunk normally after boiling, but it is not recommended to drink it for a long time if there is a problem with pipeline transportation or if the water source is polluted.

1. Tap water can be boiled and drinkable: after the tap water is disinfected, it can reach the standard of direct drinking water, and the tap water also has a sterilization effect after heating and boiling, which basically kills bacteria and microorganisms, and can be used for people to drink directly after cooling. However, it is recommended to drink tap water on the same day after boiling, because if it is left for a few days, it may grow microorganisms or fall into dust, which can have adverse effects on the body.

2. Tap water should not be boiled for drinking: If there is a problem with the water quality caused by aging and rusty pipes for transporting tap water, and environmental pollution of water sources, it is not recommended to drink tap water after boiling.

In addition, if the local water quality is hard and there is white sediment in the tap water, it is not recommended to drink it for a long time to avoid adverse effects on the body. Those who have conditions can buy pure water, mineral water, or choose a water purifier to purify the water and then heat it for drinking.

How to disinfect tap water:

Tap water disinfection mostly adopts chlorination method, the main purpose of public water chlorination is to prevent water-borne diseases, this method has been promoted for more than 100 years, with more perfect production technology and equipment, chlorine for tap water disinfection has the advantages of good disinfection effect, low cost, and almost no harmful substances.

Chlorine is soluble in water and reacts with water to form hypochlorous acid and hydrochloric acid, and hypochlorous acid plays a major role in the entire disinfection process. For inorganic substances that produce odors, it can completely oxidize and disinfect them, and for living natural substances such as algae and bacteria, it can penetrate the cell wall and oxidize its enzyme system (enzymes are biological catalysts) to make it inactive, so that the life activities of bacteria are hindered and die.

Hypochlorous acid itself is close to neutral, easy to approach the bacterial body and shows a good sterilization effect, hypochlorite ion also has a certain disinfection effect, but it is negatively charged and difficult to approach the bacterial body (the bacterial body has a negative charge), so compared with hypochlorous acid, its sterilization effect is much worse, so the chlorine disinfection effect is better than the use of bleach disinfection.