I drink tap water.
Hinckley springs makes very good water with added minerals (electrolytes).
But the best water to drink would be distilled water (purest water available 0 Total dissolved solids, 0 PPM) with added lo salt for all natural electrolytes.
why would you drink tap on a fast, use common sense
to the downvoters, drink up! enjoy! https://news.harvard.edu/gazette/story/2016/08/unsafe-levels-of-toxic-chemicals-found-in-drinking-water-of-33-states/