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In our daily lives, we always turn on the faucet to wash up every morning, but many people overlook an important thing, which is the overnight water in the faucet. It is best not to use the overnight water from the faucet directly for washing, even if it is boiled and used for drinking! Under normal circumstances, you should turn on the faucet in the morning and let it run for about 1 minute before using it. The water released can be used to flush the bathroom, water plants, and clean the floor. So why can't the overnight water from the faucet be used directly?

1. Overnight water from the faucet may harbor Legionella bacteria that can cause pneumonia
Legionella pneumonia is the most severe type of atypical pneumonia, with a mortality rate of up to 45%. According to research, Legionella bacteria can be isolated from lakes, hotels, hospitals, and household water pipes. Therefore, it is highly likely that Legionella bacteria are present in overnight water from faucets, and people who directly consume overnight water are prone to Legionella pneumonia.

2. Long term consumption of overnight water from tap water pipes may lead to lead poisoning
The water in the tap pipe will undergo a chemical reaction with the metal in the faucet or pipe, forming metal contaminated water. Moreover, the microorganisms in the tap water will also produce harmful substances to the human body after a night of reproduction. If the faucet used is of poor quality, it is more likely to cause excessive lead content in the water.

As is well known, excessive lead entering the human body can damage the brain and nerve tissue, causing insufficient oxygen supply and brain tissue damage, leading to symptoms such as anemia, headache, and fatigue. Moreover, if it enters the bodies of children or pregnant women, it can cause irreparable damage to underage children, including delayed development, deformities, premature birth, and other phenomena.

So, when we use the faucet every day, we turn it on and let it run for 1 minute to clean up the overnight water. We also need to use a bucket to hold the overnight water to avoid wasting resources.