Everyone probably has this habit-when you use water after getting up in the morning, you often take water to brush your teeth, wash your face, cook, or even drink tap water as soon as you turn on the tap. Bian Xiao will remind you today: the overnight water in the faucet the next morning is best not to be used directly for washing or boiling! Instead, turn on the tap and drain water 1 for 3 minutes before using water normally. The released overnight water can be collected to wash the bathroom, mop the floor and water the flowers.

Cause 1: Legionella causing pneumonia may hide in tap water overnight.

Recent studies have confirmed that Legionella can be isolated from water samples of water pipes in lakes, restaurants, hospitals and families, and it is very likely that Legionella is hidden in the overnight water of faucets. Once infected, people are very likely to get Legionella pneumonia. Legionella pneumonia is the most serious type of atypical pneumonia, and the mortality rate without effective treatment is as high as 45%.

Reason 2: Long-term drinking of overnight water in tap water pipes may lead to lead poisoning.

The tap water that has been stopped all night and the tap water in the water pipe are still. These water will hydrate with the metal pipe wall and the metal cavity of the faucet, forming metal polluted water, and the residual microorganisms in tap water will also multiply in large numbers. This kind of water contains a lot of substances harmful to human body.

If you use inferior faucets, the lead content of "overnight water" will seriously exceed the standard. Experts remind that the pipe network from the water meter to the faucet, that is, the water pipe behind the water meter is bought by the user himself, and the materials should be selected.

After lead enters the human body, except part of it is excreted by feces and sweat, the rest is dissolved into the blood, and after several hours, it invades the brain nerve tissue through the blood, which makes the supply of nutrients and oxygen insufficient, causing brain tissue damage, leading to anemia, headache, dizziness, fatigue, lethargy, constipation and limb pain. Some mouths have a metallic taste, and symptoms such as arteriosclerosis, digestive tract ulcer and fundus hemorrhage are also related to lead pollution.

If children are poisoned by lead, there will be symptoms such as developmental retardation, loss of appetite, inconvenient walking, constipation and insomnia. If it is a primary school student, it is accompanied by hyperactivity, hearing impairment, inattention, mental retardation and other symptoms; Especially, children are in the stage of growth and development, and their sensitivity to lead is higher than that of adults. Lead entering the body has a strong affinity for the nervous system, so the absorption of lead is several times higher than that of adults, and the damage is particularly serious.

If lead enters pregnant women, it will cross the placental barrier, affect fetal development, cause deformity, and even lead to premature delivery and abortion.