In our daily life, we turn on the tap to wash every morning, but many people ignore an important thing, that is, the overnight water in the tap. The overnight water in the faucet had better not be directly used for washing. Even if it is boiled, it can't be used for drinking! Under normal circumstances, you should turn on the faucet in the morning and drain the water for about 1 minute before using it. The discharged water can wash the bathroom, water the flowers, wash the floor, etc. So why can't the overnight water of the faucet be used directly?
    1. Overnight tap water may contain Legionella bacteria that can cause pneumonia
Legionella pneumonia is the most serious type of atypical pneumonia, and the mortality is as high as 45%. According to the research, Legionella can be isolated from the tap water pipes of lakes, hotels, hospitals and families. Therefore, Legionella is very likely to exist in the tap overnight water, and people are prone to Legionella pneumonia once they eat the overnight water directly.

    2. Long term drinking of overnight water in tap water pipe may cause lead poisoning
The water in the tap water pipe will react with the metal in the faucet or water pipe to form metal polluted water, and the microorganisms in the tap water will also produce substances harmful to human body after one night's reproduction. If the faucet used is of poor quality, it is more likely to cause the lead content in the water to exceed the standard.

    As we all know, excessive lead entering the human body will damage the brain nerve tissue, cause insufficient oxygen supply, cause brain tissue damage, and lead to anemia, headache, sleepiness and other symptoms. What's more, if it enters children or pregnant women, it will cause irreparable damage to minor children, including developmental delay, deformity, premature birth and other phenomena.

    Therefore, when we get up and use the faucet every day, we'd better turn on the faucet to put water for 1 minute, clean up the overnight water, and use buckets to hold the overnight water, so as to avoid waste of resources.