Water hardness in Zhongshan City

The water hardness is stable and less than 150mg/L all year round, and the water quality is soft.

According to national standards, the total hardness of drinking water must be less than 450mg/L. The hardness of tap water produced in Zhongshan City is stable and less than 150mg/L all year round, and the water quality is soft.

Hard water refers to water with more soluble calcium and magnesium compounds. Hard water does not pose a direct health hazard. Generally speaking, there is more hard water in the north of my country and more soft water in the south. Although tap water may produce a small amount of scale after heating, its hardness is not high and it is considered soft water.

Water hardness usually refers to the concentration of soluble calcium and magnesium compounds in the water. The more calcium and magnesium ions, the higher the hardness. The expression method of hardness has not yet been unified. The most commonly used expression method is to convert the measured calcium and magnesium into the mass of CaCO3, that is, the number of milligrams of CaCO3 per liter of water, expressed in mg/L.

For reference only and no authoritative data.