Water is the source of life, and we need to consume a certain amount of water every day to maintain the normal functioning of the body. However, with the rapid development of industrialization and urbanization, the problem of water pollution is becoming more and more serious, and the safety of drinking water has received extensive attention. So, how can we tell if drinking water is safe and drinkable? What are the water quality testing standards for drinking water?
First of all, we can make a preliminary judgment about the safety of drinking water by looking at its appearance, smell and taste. Normal drinking water should be colorless, tasteless and transparent, if you find that there is turbidity, odor or discoloration in the water, then it is likely that the water quality is polluted and should not be drunk. In addition, we can also detect harmful substances in the water through simple experiments. For example, if the pH of water is measured using pH test paper, if the pH is too low or too high, it may indicate that the water contains harmful substances.
Of course, in order to have a more accurate understanding of the safety of drinking water, we need to conduct professional water quality testing. According to the national standards, the water quality testing of drinking water mainly includes the following aspects:
Microbiological indicators: Including the total number of bacteria, total coliform bacteria, fecal coliforms, etc., these indicators can reflect the hygienic status of water quality.
Toxicological indicators: Including lead, cadmium, mercury and other harmful elements, as well as chlorine, fluoride and other inorganic substances, these substances exceed the standard may cause harm to human health.
Organoleptic traits and general chemical indicatorsSuch as color, turbidity, odor and taste, visible to the naked eye, pH, total hardness, etc., these indicators can reflect the physical and chemical properties of water.
Radioactivity indicators: including total radioactivity, total radioactivity, etc., these indicators can be used to assess whether the water source is contaminated with radioactivity.
Through professional water quality testing, we can have a comprehensive understanding of the safety of drinking water and ensure the health of our drinking water. At the same time, all sectors of society should also strengthen the protection and management of water resources, improve the quality of drinking water, and ensure the safety of people's drinking water.