First of all, let’s talk about whether boiled water can be consumed overnight. In normal conditions, even boiled water can be consumed overnight. However, the best time to consume it should be within 72 hours, if it exceeds 72 hours, it should not be consumed.
Properly boiling water (boiling until it reaches a strong boil and continue cooking for 1 minute) can kill harmful bacteria. However, even though boiling water reaches 100 degrees Celsius, if it cools for more than two hours, bacteria will reappear, and after 24 hours, the amount of bacteria will increase significantly.
With the hot and humid climate in our country, with temperatures frequently above 21 degrees Celsius, coupled with improper storage, water is prone to bacterial contamination. Boiled water that has been left to cool for a long time also produces nitrate acid salts, which are substances that can cause cancer.
In another case, whether boiled water can be consumed or not also depends on the storage environment. For example, if the kettle is left open while boiling, some dust and lint can easily adhere to the surface of the boiling water. If you have pets such as dogs or cats at home, during the waiting time for the water to cool down and storing it in a container, some animal hairs may fly into it. At this time, you should not drink the water even if it has just been left overnight.
It is best to cover the kettle when you usually let boiled water cool down to prevent dust or some small flying insects from entering the boiling water, which will cause bacterial growth and affect the quality of the drinking water. And if you usually have boiled water left overnight at home and forget to drink it, don’t throw it away, but reuse it.
Usually, we can use overnight cooled water to brush our teeth because boiling and cooling down the white water will be better for dental hygiene than tap water. Moreover, boiled water that has been left to cool down does not have any particular smell, so it is also fine for brushing teeth.
We can also use water that has been left overnight to water plants. Boiled water that has been left to cool down can remove alkaline substances in water, so it is suitable for watering plants or raising fish. Like some humidifiers, electric irons, and other small household appliances that use water. You can also use boiled water that has been left overnight, because the alkaline content in this water has decreased, so when we use these electric devices, the drainage holes will not easily get blocked.
According to An Nhiên – VietNamNet
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