Which is likely unrelated. Lead in the tap water comes from older buildings with inappropriate plumbing materials [0] or potentially from a colossal screw up with modern construction. Or maybe from a really horrible water utility, but SF does not have that problem. It has nothing to do with contamination of the site.
I think lots of houses in Europe have lead in the tap water though... Because they are old and changing the pipes in the building costs a lot.
I took a measurement in a downtown Budapest flat we rented and it came back 10x the limit. The water had no odor, discolor or taste.
