LOINC display name : Hardness Calc (Water) [Mass/Vol];
LOINC long common name : Hardness [Mass/volume] of Water by Calculation;
LOINC short name : Hardness Wat Calc-mCnc;
LOINC description : Water hardness is the concentration of calcium and magnesium ions expressed as equivalents
of calcium carbonate (CaCO3) and is calculated with the following formula: CaCO3
Ca(mg/L) 2.97 Mg(mg/L) 4.118;