Limit water hardness:
Drinking Water Hardness:
How much is the drinking water hardness limit?
The water hardness is specific to the particular salts in the water. These salts include cations such as magnesium, calcium, strontium, iron, aluminum, manganese and copper, which are soluble in water with anions such as bicarbonate, carbonate, chloride, sulfate, silicate, and nitrate.
Total hardness :
Temporary hardness (hardness of carbonate) plus permanent hardness (bicarbonate hardness) is said to be hard. Temporary hardness precipitates by boiling water, and the mass in the containers is boiling water, and often consists of calcium carbonate or bicarbonate and Magnesium. Permanent hardness is not lost due to the presence of elements such as sulfate and calcium chloride and magnesium produced by boiling.
Permissible barrier to drinking water
It should be noted that according to international standards of health, the maximum limit for drinking water is 500 mg / l in calcium carbonate and its optimum is 150 mg / l in calcium carbonate.