Because hexagons are bestagons

Based girlfriend

Correct me if I’m wrong, but I think the EU has regulations that say tap water should be drinkable as-is.

That said, in some places it may taste a bit weird - and by place I mean even in the same city. I live in a city in Hungary, lived in four different buildings on different parts of the city. 3/4 the water was fine 99% of the time, though the fourth one was absolutely nasty. Didn’t live there long luckily.