Re: Mixing water from two different water sources
At 52 yrs of age and only recently starting to drink water, I cannot offer the advice of some with their experience.
As for it killing you, I think you would have to ask yourself "Do you feel lucky".
Or maybe ask some unwanted Vegan relative visiting over the holidays if they would like some water (dont mention the 2 different sources). I guess only if the bottle has not broken by then.