Plumbosolvency
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Plumbosolvency is the ability of a solvent, notably water, to dissolve lead. In the public supply of water this is an undesirable property, in (usually older) consumers' premises plumbosolvent water can attack lead pipes leading to increased lead levels at the tap.
Plumbosolvency of drinking water can be countered by increasing the pH with lime or sodium hydroxide, or by the addition of phosphate at the water treatment works.
Lead is a common contaminant of drinking water, which leaches into the water from lead plumbing.