[GoToRO]

for me "just a feeling of ‘meh’" -> bad water

Not bad enough to make me really sick, just meh. Not feeling like doing anything, very rare headaches.

[victorwho86]

bad water in the sense that it is contaminated or...?

[GoToRO]

Yes, bacterial.

[victorwho86]

I had that problem when I moved in the mountains last year. Bought a LARQ bottle (UV disinfection) and fixed it with little effort. Kaladyn also makes good UV disinfection I believe.