The PRO-LAB Lead in Water test kit offers you an accurate water analysis to EPA proficiency standards revealing the amount of lead in your water to as little as 1 PPB.It is estimated that more than 3 million children in the United States have lead poisoning. Lead is a toxic metal that has been used in the past by manufacturers to make faucets, fixtures and copper pipe solder. Even "lead free" plumbing may contain up to 8% lead. Although lead was banned in 1986 in the manufacture of all fixtures, pipes and solder, it is estimated to still be in the pipes of over 90% of all homes in the U.S. Lead is dissolved into your drinking water from pipes, solder and fixtures in your home's water system and water service lines. When water stands in pipes, fixtures and water systems containing lead for several hours it dissolves into your drinking water. This is true especially if you have acidic water (low pH).This means that the first water drawn from the faucet in the morning can contain high levels of lead. Since lead is colorless and tasteless when dissolved, you must test to detect lead in your water.