Category : 5

Sub Category : 18

Sub-Sub Category : 1

Method : IS 3025 Part-21:2009 RA:2019

Standard : IS 10500:2012 RA:2018

Description : Hardness in water is due to the presence of dissolved salts of calcium and magnesium. It is unfit for drinking, bathing, washing and it also forms scales in boilers. Hence it is necessary to estimate the amount of hardness producing substances present in the water sample.

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