③The chemical composition is harmless to humans: the chemical substances contained in the water do not cause acute, chronic poisoning and long-term harm to the human body.

What does drinking water contain?

1. Barreled water: refers to the purified water or mineral water that is processed by modern industrial technology (reverse osmosis, electrodialysis, distillation, resin softening, etc.) using tap water or extracted groundwater, which is filled from the filling production line to the PC barrel The resulting product.

2. Surface water: refers to the general term of dynamic water and static water on the land surface, also known as "land water", including various liquid and solid water bodies, mainly rivers, lakes, swamps, glaciers, ice caps, etc. It is one of the important sources of water for human life and the main component of water resources in various countries.

3. Groundwater: refers to the water stored in the rock gap below the ground, and in a narrow sense refers to the water in the saturated aquifer below the groundwater level. Well water that is often drunk in daily life is a kind of groundwater.

4. Purified water: H2O without impurities, referred to as purified water or pure water, is pure, clean water, free of impurities or bacteria, free of organic pollutants, inorganic salts, any additives and various impurities. The sanitary standard of domestic water is raw water.

5. Direct drinking water: also known as healthy living water, it refers to the water quality that is free of pollution, meets the main needs of the human body (contains beneficial mineral elements similar to the human body), and fully meets the standard of healthy water for direct consumption announced by the World Health Organization.

According to the use of water quality, the impact on the human body and the impact on the grave, the country has clear national standards and corresponding testing methods and testing items for various types of water quality testing. Different water quality testing methods, testing items and implementation of national standards are not the same.

Test items:

Domestic secondary water: 106 items of domestic drinking water.

Which industries need to do drinking water monitoring:

1. Drinking water production enterprises

2. Institutions, research topics

3. Enterprise system certification, customer factory inspection

4. Apply for sewage permit

5. Daily government supervision

6. Environmental Impact Assessment

7. Water quality project acceptance

8. General catering industry

9. Customers self-check drinking water