Lead contamination of potable water due to nitrification.

Nitrification can increase levels of soluble lead in potable water by reducing pH. The magnitude of the pH drop depends on the initial alkalinity and extent of nitrification. At 100 mg/L alkalinity as CaCO3, complete nitrification did not significantly decrease pH (pH stayed >7.

Nitrification in premise plumbing: role of phosphate, pH and pipe corrosion.

Nitrification in PVC premise plumbing is a weak function of pH over the range 6.5--8.5 and is insensitive to phosphate concentrations 5--1000 ppb.