Lead is uncommonly found naturally in source water. More commonly, lead leaches into water over time through corrosion-a dissolving or wearing away of metal caused by a chemical reaction between water and your plumbing. Lead can leach into water from pipes, solder, fixtures, faucets (brass) and fittings. Lead service lines and pipes have not been found to be used in construction in the District, so sources of lead in our drinking water are primarily limited to solder and fixtures. The amount of lead in your water depends on the types and amounts of minerals in the water, how long the water stays in the pipes, the water’s corrosivity, and water temperature.