Can human eyes tell the cleanliness of water quality?
In fact, this way is totally wrong.
Our eyes can determine the water containing impurities, but can not distinguish the harmful bacteria in the water. Because bacteria are single-celled microorganisms, which is invisible to the human eye and need to be observed with a microscope.
Bacteria are the pathogen of many diseases. Water containing pathogens can cause a variety of diseases in humans. Cleaning the dirt in the pipeline can effectively reduce the bacteria in the water source. Therefore, it is necessary for the family to have a healthy water environment by cleaning domestic water pipes.