浊度 Turbidity is an index that reflects the physical properties of natural water and drinking water. The turbidity of natural water is caused by suspended particles such as sediment, clay, organic matter and microorganisms in the water。The national standard requires less than or equal to 3 degrees, and no more than 5 degrees in special cases。 Total bacterial count Total bacterial population refers to the total number of bacterial colonies grown by 1 ml water sample cultured in nutrient AGAR medium at 37 degrees Celsius for 24 hours。National standard requirements less than or equal to 100 / ml。The total number of bacteria measured increased, indicating that the water was domestic waste...

Tap water, an indispensable resource in our daily life, its quality has a direct impact on our health。And you know what？In this seemingly clear tap water, there is a hidden killer - residual chlorine。 Before tap water flows into our homes, it needs to go through a long process, including municipal pipe networks, community pipe networks, high-rise water tanks and other links。In this process, in order to control bacteria and germs in the water, the water supply department will add a certain concentration of residual chlorine in the water。 Tap water containing residual chlorine ...

Substances in water can be grouped into three broad categories。 The first type: those harmful substances that we can intuitively perceive, such as particulate impurities and residual chlorine odor; The second category: those hidden deep, we can not directly detect harmful substances, including microorganisms, heavy metal pollution, chemical pollutants; The third category: mineral ion elements that are beneficial to the human body。 The ideal drinking water should eliminate harmful substances while retaining natural mineral elements。However, sometimes in the process of removing harmful substances, mineral elements...

Living in a tall building, facing the sea every day, with warm spring flowers, such a life is full of poetry。 And you know what？ Beneath these towering buildings lurks a potential crisis - secondary water supply pollution。 Water is the source of life and the basis for maintaining the normal operation of the human body。 But as a society, we seem to be more concerned with food security than we are with the quality of water, the most critical element of life。 Especially in tall buildings...

The controversy over water purifiers continues to plague consumers。Some people think water purifiers are very useful, while others are skeptical。So, do water purifiers really work？ As can be seen from the CCTV program, their attitude towards water purifiers is very clear。Bai Yansong blurted out water purification equipment in news 1+1, indicating that these journalists are the most aware of the current status of drinking water, otherwise he would not have spoken so smoothly。 And in another CCTV program, the host is directly to consumers recommend water purifiers, so...