I have a filter before the water comes in and after it comes out of the water tank.

Heated water is kept in a different reservoir and the piping uses heat resistant PVC.

In Brazil, most times the water has a smell of chlorine so I guess the chances of it having deadly/lethal microbia there are next to null?

Drank water from the tap (where plumbing is done properly) for all my life, never had any problems so far.