I always run the water in the bathroom and kitchen until it's super cold, letting me know I've gotten to the stuff fresh out of the main. But I was trained to do this because when I was a kid we had some lead pipes in our home, heh.
There were no lead water pipes in our home but lead pipes were used to couple gas meters to iron pipes presumably to make installation easier. What was worrying was that all the street water mains were made of asbestos cement.
Decades ago, when I first traveled to France to visit relatives I noticed that all the water plumbing in their home was lead.
When I commenced on it and the dangers they thought I was a little eccentric and commented that that was the norm in that area of Paris and no one had become sick from the lead pipes.
My only comment is that my French cousins who are roughly the same age as I am are much smarter than me. (Pb is supposed to dull the brains of kids so what went wrong here?)
https://www.npr.org/2016/03/31/472567733/avoiding-a-future-c...
Clearly the French weren't overly concerned about it. Like most of the EU they overregulate everything and presumably would have mandated the pipes be changed if they thought them a problem.