Hi !
Bottled water is easy to find along the way. I bought some quite often. Supporting the local economy, and being generally sceptic about tapped water. Besides, you you use the same bottle for too long, it becomes quite dirty. But the times I used water from taps along the way, wheter it was in the refugios or the taps for pilgrims along the way, I had no problems, even if my stomach easily gets upset when I am being abroad.
I kept a few Imodiums just to keep certain, but I never used them.
Good luck, and buen camino !
Liv