Most faucets purchased prior to 1997 were constructed of brass or chrome-plated brass, which contain up to 8 percent lead (the main metals in brass are copper and zinc). Water sitting for several hours or overnight in a brass faucet can leach lead from the brass faucet interior which may produce high lead levels in the first draw of drinking water. Later regulations mandated that most faucets purchased after 1997 contain less lead than previously used thereby reducing the possible leaching of lead. However, the most recent legislation, called “Get the Lead Out,” mandates that after January 4, 2014, all faucets purchased will contain no more than a weighted average of 0.25 percent lead in relation to wetted surface.