They probably are not lead pipes, lead is to soft to be used as a pipe material
Lead has been used for pipes for FAR longer than any other metal, it's perfectly acceptable for pipes, and probably the best low technology material for pipes.
the pipes are probably galvanized steel, is that what you meant? Now it's possible that it has lead joints since many old houses have them; but nowadays it is illegal to use lead in any domestic piping system.
Lead pipes haven't been used for many years, but there are still plenty of them in use - I still have lead gas pipes in my house. All water pipes in the house are copper, but I wouldn't be surprised if the incoming underground supply isn't still in lead?.