What is the white sediment in tap water?

Scale. Scale, commonly known as "water rust, water alkali", refers to the white block or powdery substance gradually formed after the minerals contained in hard water are boiled in containers (such as pots and kettles). The main components are calcium carbonate, magnesium hydroxide, magnesium carbonate, calcium sulfate, magnesium sulfate, calcium chloride and magnesium chloride.

Scale has poor thermal conductivity. Too thick scale in the boiler will reduce the efficiency of the boiler, and too heavy scale will cause the boiler to burst and cause boiler accidents.

For example:

The staff said that such a situation occurred after the tap water was boiled, and it is likely that some calcium oxide and magnesium oxide were precipitated.

However, for the staff's answer, Mr. Zhang also raised his own question: "There is no such thing. After brushing the water tank from the property, there are white things and floating objects inside. You can't eat anything in this water! "

In order to completely solve Mr. Zhang's troubles, the staff of Qiqihar Water Group took samples from Mr. Zhang's home and prepared to take tap water for relevant water quality testing.

Liu He, Deputy Director of the Water Quality Testing Center of Qiqihar Water Group: We will take it back to test the hardness of the water to see if there is any problem with the water quality.