My house is 100 years old, and the supply lines are lead.
All of my neighbors houses as well, as the lines were laid in the street starting in 1910.
The interior piping is copper with some recent PVC. Some lead solder joints in the copper. But from the meter out to the street it’s all lead (I know because I accidentally snapped off my meter once).
Wow, that is interesting. I’ve never come across any actual lead pipe in a water system.
Either way, in the case of Flint, if their water system is lead pipe, then the lead issue was there all along. Switching from the Detroit system to the Flint river would have not made any real difference.
Where on the Flint river are they pulling their water from?