We do have lead pipes coming into the house from the street, and have managed to get dd's lead from 12 to 6 in about six months. (The main problem was really a chipping, lead-painted door.) Apparently, lead amounts in water from lead pipes are negligible if you only cook and drink from the cold water tap, and let the cold water run for a few minutes every morning. Even with lead pipes, the source of lead poisoning is usually lead dust from painted windows, chipped paint, or contaminated soil that gets tracked into the house. Brita does filter lead, but you should be careful to change the filter as recommended, because its performance declines with use. EPA has lots of info, and a great booklet that they give out.