How much do you know about drinking water safety tips?

1. What are the basic requirements for drinking water quality?

A: (1) Must not contain pathogenic microorganisms;

(2) Chemical substances shall not endanger human health;

(3) Radioactive substances shall not endanger human health:

(4) Good sensory traits;

(5) It should be disinfected.

2. What are disinfection by-products? What are the hygiene requirements?

A: In the process of disinfection of drinking water, the disinfectant reacts chemically with some natural organic matter and environmental organic matter contained in the source water, as well as bromine or iodide, resulting in a variety of disinfection by-products. The types of disinfection by-products are related to the way drinking water is disinfected, and different disinfection methods produce different types of disinfection by-products.

At present, the disinfection method of municipal water supply is mainly chlorinated disinfection, and the types of disinfection by-products produced are mainly halogenated hydrocarbons and haloacetic acids, and the sanitary standards for drinking water (GB 5749-2006) have stipulated the sanitary requirements for more than 10 kinds of disinfection by-products such as trichloromethane, monobromodichloromethane, dibromo-chloroform, dichloroacetic acid, trichloroacetic acid, etc.

3. Why does tap water appear milky white?

Answer: When tap water is transported in a high-pressure closed pipe, the air in the pipeline will dissolve into the water due to high pressure, when the tap water flows out of the tap, the air in the water will be released due to the recovery to normal pressure, thereby forming countless tiny bubbles, so that the appearance of the water is milky white, after a moment, it will be clarified and does not affect the health of drinking water.

4. Why drink boiled water?

A: After the tap water and the on-site water purchased by the tap water are boiled, the pathogenic microorganisms in the water are basically killed, and most of the volatile organic compounds can be removed, so it is recommended that residents drink boiled water.

When boiling water, it is recommended to boil the water for another 1-2 minutes after boiling, which can effectively kill the pathogenic microorganisms in the water, and also make the chlorine gas and some volatile substances in the water be evaporated.

5. Why does tap water turn yellow?

A: The yellowing of tap water is likely to be affected by the rust on the inner wall of the iron pipe in the water pipeline network. You can let go of some tap water and use it until the water quality is clear.

6. What is the purpose of disinfection of domestic drinking water?

A: Kill pathogenic bacteria and prevent the occurrence of intestinal infectious diseases.

7. Some people say that adding a coagulant (water purifier) to the water is even if the drinking water is detoxified, right?

Answer: The coagulant, also known as the water purifier, can only be used for the source water coagulation precipitation (clarification), and cannot play a role in drinking water disinfection.

8. What should I do if I find that the drinking water is turbid, colored, or has a peculiar odor or odor?

Answer: Drinking water that meets the requirements of health and safety should be colorless, transparent, odorless, odorless, once the drinking water is found to be turbid, colored or odorous, odor, it should be immediately stopped drinking and reflected to the health administrative department. Health administrative departments should immediately organize health supervision agencies and disease prevention and control agencies to carry out investigations and treatment, including water quality testing. After identifying the cause of the contamination and eliminating the abnormality, you can continue to drink.

9. Why does limescale appear in the kettle?

A: The water used in daily life has a certain hardness, such as the high hardness of water, when heated, the insoluble salt components of calcium ions and magnesium ions (such as calcium carbonate and magnesium carbonate, etc.) will precipitate from the water, adhering to the inner surface of the kettle to form scale. The total hardness of tap water does not exceed 450mg/L is in line with the national drinking water sanitation standards.