1 How long can't you drink plain water

It is generally recommended that you can't drink it for more than 6 hours.

Boiled water stored at room temperature, generally placed more than 6 hours is not recommended to drink, because boiled water and air contact time is too long, the water has been contaminated, breeding a lot of bacteria and other micro-organisms, drinking it is easy to have an impact on the health of the body, may appear abdominal pain, diarrhea and other symptoms, need to pay attention to is that if you will be placed in the white water in the other thermos cups, kettles, and other thermal tools

2 cold water put 5 days can drink

General is not recommended to drink.

Cool white water is white water after cooling a kind of water, itself in the process of cooling is relatively easy to breed bacteria and other harmful substances, if then put 5 days, it is easy to produce nitrite substances such as toxic substances, the longer the content of nitrite substances is higher, drinking, it will affect the health of their own situation, the general cool water put 5 days is the best thing to do is not to drink, it is recommended to re-burn a pot of water.

3 drink put a month of boiled water

Boiled water if stored for a month, this time the water is containing many harmful substances, generally do not recommend drinking, if a small amount of drinking, the body does not appear uncomfortable symptoms, generally not a big problem, in order to insure that it is best to drink a cup of hot water, if you drink dizziness, nausea, pale, and other symptoms, it is generally recommended to immediately go to the hospital for examination. Go to the hospital for a checkup.

Note: It is best to drink the water on the day it is boiled and not store it for too long.

4 Can you drink the second boiled water

You can drink it.

Under normal circumstances, the water cooled and then heated, you can drink, and will not have a great impact on human health, but if the water storage time is too long, more than a day, the water will breed bacteria and other harmful substances, easy to accumulate toxins, generally is not recommended to drink after the second heating.

Note: The water can be drunk on the second heating, but do not repeat the heating.