I use tap water. But I think this depends a bit on the area. I would NOT give Auggie tap water from where I work - but then NO ONE drinks the tap water there - we know it's contaminated.
I really don't understand this 'organic water' thing. I hate to be such a cynic (okay, actually I like to be, but I'm trying to be polite) but if you have one ingredient which is questionable, mixing it with another ingredient that is 'organic' does not make the whole concoction organic.
I am familiar with the positive claims associate with cider vinegar - though I can't vouch for them - but purifying unsafe water has never been one of those benefits.
Mixing in a good ingredient with an unsafe one does not make the mixture safe.