US/Canada here as well as someone that has visited most of western Europe (UK, France, Netherlands, Belgium, Luxembourg, Germany, Switzerland) and stayed in hostels - no boiling necessary in any of these places.

There’s actually a pervasive myth I’ve encountered that hot tap water is dangerous and that one should only drink cold water. As far as I’m aware, this myth is due to an old setup for water systems that many western homes had before modern taps. The tap was separated into separate cold/hot faucets. The cold water came safely from the city, but the hot water came from tanks that were stored in people’s attics. The water in these tanks sat stagnant and was therefore prone to rats and other creatures dying in it or bacteria building up. This is why still today, most British homes have separate hot/cold taps - to keep the “safe” water separate from the “dangerous” water. I occasionally encountered such taps in the US and I assume that’s why my dad raised me to make sure the water was cold before drinking it. My father’s understanding of this was clearly outdated though. I learned all of this from a Tom Scott video.