Equilibrium pH (pHeq, empirical)

Empirical estimate of the equilibrium pH a water tends toward after calcium carbonate precipitation, used as the pH input for the Puckorius Scaling Index.

$${\text{pH}}_{eq}=1.465\times {\log }_{10}({\text{Total Alkalinity as CaCO}}_3)+4.54$$

Variables

Symbol	Meaning	Unit
${\text{Total Alkalinity as CaCO}}_3$	Total alkalinity expressed as calcium carbonate	mg/L as CaCO3

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Part of The Blueprint of Water