The American Public Health Association reports that the ph level of naturally occurring water is between 6.5 and 8.5 ph. A ph of 7 is considered neutral, below seven is acidic, and above seven is alkaline. [4] The World Health Organization reports that water with too low a ph or too high a ph can cause health conditions affecting the eyes, skin, and gastrointestinal system. [5] Other studies, many which are anecdotal — including my own, show that low ph levels in water can cause symptoms of acidosis