How does lead get into the water supply?
There are several different ways lead can get into the water supply. The most important thing to understand is that when water leaves the treatment plant, it does not have lead in it. Once it travels through the pipes to get to your home is when it may appear. It may be from a lead connector pipe that connects your home pipe to the city pipe or from lead solder used in older copper plumbing (pre-1986). Lead can even leach into the water supply from older brass faucets and fixtures, because lead used to be used in the manufacturing process to make brass.
