Why Is Alkalinity Is Reported As Mg L As CaCO3?

Why Is Alkalinity Is Reported As Mg L As CaCO3? Why is alkalinity reported as “mg/L as CaCO3”? Units of mg/L are a “mass dissolved in a liquid.” Reporting alkalinity as “mg/L as CaCO3” specifies that the sample has an alkalinity equal to that of a solution with a certain amount of calcium carbonate (CaCO3)