Portugal here.
Safe to drink tap water everywhere, as far as I know, and public fountains (they usually have a metal sheet saying if it is potable or “not tested regularly”.
Depends on the Municipality/Town Halls.
Where I live we have like 5 or 6 public fountains per square km, some with public tanks to wash clothes like old school).
Story time tough, and applicable to the conversation:
I went through a Leukemia and the marrow transplant.
5 months after the transplant I went to Lisbon (I live in the north) to see family.
I took a shower after arriving, and my skin reacted very poorly.
The reaction was so strong, the transplant almost didn’t take.
I had to take high doses of cortisol (and other treatments) that fucked up my bones (3 protheses now. Right elbow and the 2 femur heads)
The doctors in IPO (oncology hospital) explained that the skin is the biggest organ in the body and where i live the terrain is more Granitic in nature, my skin was used to water here in the north, and the further south you go in Portugal, the more Calcaric (limestone/calcário) it is.
People in Lisbon have to use “Calgon” (product) in the washing machines, to clean the build up of limestone.
But they themselves are used to it.
People of the north (of course it depends on the person) showering in the south, tend to have dry skin and hair after the shower.
I’m sorry for the testament.
But it’s knowledge.
Stay safe.
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