High quality faucets can effectively prevent the harm caused by overnight water

Is it best not to use the overnight water in the faucet for washing or drinking?
Usually, tap water is weakly acidic and staying in the faucet for a long time may cause metal pollutants in the faucet to precipitate and dissolve into the water, causing water quality pollution, especially for low-quality faucets.

There is an experiment where researchers collected overnight water from 10 households' faucets and sent it to the laboratory for testing. The results showed that the metal pollutant - lead precipitation - in the water samples of 3 households exceeded the standard!
Excess lead will damage human brain nerves, causing headache, dizziness, fatigue, etc. If infants and children are more sensitive to lead than adults, the harm will be greater, which may cause physical and mental retardation.

So, for safety reasons, on the one hand, it is recommended that everyone choose high-quality faucets as much as possible; On the other hand, it is best not to use the "overnight water" that is stuck in the faucet. When opening the faucet every morning, you can let it empty for a while and use this water to flush the bathroom, mop the floor, etc.