Sihaiwang: now all the families in the city use tap water. However, when summer comes, sometimes the boiled water is not cooked well at home, and there is no water dispenser. Disrelish trouble, thirsty again, can drink tap water directly. Can tap water be drunk directly? Let's have a look at it together!
1. Handling method
Our water source is divided into surface water and groundwater, of which surface water pollution is serious. Now many city water companies use the old-fashioned water treatment process decades ago, which uses flocculation, sedimentation, filtration and disinfection. This old-fashioned process can only remove part of the colloid in the water, but not the organic pollution and heavy metals.
2. Long distance pipeline transportation
In the pipe network of tap water, long-distance pipeline transportation, old and rusty pipelines, unclean water tanks and buildings' reservoirs in urban high-rise buildings or non disinfected water tanks used all the year round can cause secondary pollution. Secondary pollution causes bacteria, viruses and algae to multiply. In addition, the original chlorine and chloride, rust, heavy metals and radioactive substances make the water turbid and peculiar smell, which is quite harmful to the liver of the body.
3. Do not clean water tank
High rise buildings generally have a water tank for secondary water supply. If the water tank is cleaned irregularly, the water in the water tank will be dirty and frightening.
4. Tap water standard
The main uses of tap water in people's homes are: washing dishes, washing vegetables, bathing, washing clothes and cleaning. This part of water accounts for more than 90% of the total water consumption, while boiling water, drinking water and cooking water only account for a small part. Therefore, the water purification standard of the waterworks is domestic water, not direct drinking water.
5. Drink only boiled tap water
Although the sanitary quality of tap water meets the national sanitary standards, it is better not to drink the tap water without boiling, because tap water is drinking water for life, rather than direct drinking water. There is a huge difference between the two. In addition, boiled water placed for more than 24 hours is not suitable for drinking.
6. Do not drink repeatedly boiled tap water
After repeatedly boiling water is not suitable for drinking, because the concentration of nitrite in such water is very high. Drinking this kind of water often will cause nitrite poisoning; scale often enters the human body with water, and will cause digestive, nervous, urinary and hematopoietic system diseases, even lead to premature aging.