Earlier quoted context omitted.
I live in Zürich. The water company here says that it's unfair to compare the tap water with bottled mineral water; the tap water is substantially better. (I had a tour of the plant. They are a serious group of overachievers. The source of the water is mostly the local lake, and is purified by, two grades of sand filter, activated charcoal, ozone purification, and a bacterial bed. They actively manage the biofilms in…
Well it's just plain unfair to compare German efficiency and thoroughness with... anywhere else in the world.
I wouldn't recommend calling them German. :)