Raw water: Health and the water contains harmful bacteria, viruses and parasites. The raw water to drink, it is easy to cause acute gastroenteritis, viral hepatitis, typhoid, dysentery and parasitic infections. In particular, the current size of rivers, reservoirs, wells have varying degrees of factory waste water, waste water and pesticides life of pollution, disease caused more raw water to drink.

Aging water: commonly known as "stagnant water" that is a long time fixed storage of water. Changyin this water, for minors, would significantly slow down the cell metabolism, affecting the physical growth and development; will accelerate the aging of the elderly. In addition, many parts of esophageal cancer, gastric cancer incidence rate of increasing, according to research, may be aging and long-term drinking water. Relevant data shows that the ageing of toxic substances in water, will be a time of increased water storage and more.

Thousands of boiling water: thousands of boiling water is repeatedly boiled water. This water too long because of Zhu De, the water is not volatile substances, such as calcium, magnesium and other elements and heavy metals in high nitrite, a long time to drink this water, interfere with the body's gastrointestinal function, make a temporary diarrhea , Abdominal distention. Nitrite were caused by the body but also the lack of oxygen, there can be serious coma, convulsions or even death.

Zhengguo Water: Water is steaming Zhengguo steamed bread, steamed stuffed buns, and so the leftover pot of water, especially after many repeated use of water Zhengguo, a high concentration of nitrite. Changyin this water, or use this boiled rice porridge, will cause nitrite poisoning. In addition, the scale capital Zhengguo water with the water enters the human body, will cause digestive, nervous, urinary tract, blood and circulation system, such as the premature aging disease而使the human body. This is due to scale the presence of more harmful elements such as cadmium, mercury, arsenic, aluminum, and other causes.

Do not open the water: people drinking tap water, the chlorination disinfection and sterilization are dealing with before. Chlorine-treated water can also be isolated from 13 kinds of harmful substances, halogenated hydrocarbons, chloroform is carcinogenic, teratogenic effect. When the water temperature reached 90 ℃, halogenated hydrocarbon content from 53 micrograms per kilogram rose to 177 micrograms, state drinking water health standards more than two times. Experts point out that not drink boiled water, suffering from bladder cancer, cancer of the possibility of an increase of 21% -38%. When the water temperature reached 100 ℃, the two water with harmful substances will greatly reduce the evaporation, such as boiling to three minutes, will be more safe to drink.

Re-Zhukai the water: It was customary in the remainder of the Re Shuiping temperature water, then boil drinking again, the purpose of saving water, Jiemei (gas), at the festival. However, such "savings" Buzu Qu. Because the water burned and burned, so that water evaporation again, nitrite content will be increased, Changhe the water, nitrite will accumulate in the body, caused poisoning.