Up here, I only bring to a rolling boil for a minute. Never had problems. Of course, in Canada we don’t have a lot of the nasty things in our water as you would find elsewhere.

I’ve been parts of the world where we filtered the water thru a micro pure pump filter and THEN boiled it for good measure (for several minutes)

After all that we were still nervous about drinking it.

During outdoor activities at home however, My pump filter is one of my favourite and most used bits of gear. I only boil water not if I’m cooking or want something hot to drink. Saves time and fuel.