Plain water can generally be stored for about 2 days.

Plain boiled water, also known as cool boiled water and frozen boiling water, is the most commonly consumed water in daily life. Moreover, boiled water is usually stored in household kettles, so it is easy to breed bacteria and can generally only be stored for 2 days. about.

Boiling water can kill bacteria and remove substances harmful to the human body. Because tap water has been chlorinated, chlorine interacts with residual organic matter in the water to form toxic carcinogens such as halogenated hydrocarbons and chloroform. compound. When the water temperature reaches 90°C, the content of halogenated hydrocarbons rises to 191 μg/L, and the content of chloroform rises to 177 μg/L, both exceeding the national standard by 2 times; when the water temperature just reaches 100°C, the contents of halogenated hydrocarbons and chloroform are respectively It contains 110 micrograms and 99 micrograms per liter; if it continues to boil for 1 to 2 minutes, these two substances will quickly drop to 9.2 micrograms and 8.3 micrograms per liter respectively, reaching drinking standards. Therefore, it is best to boil water for about 1 to 2 minutes.