Acidity is measured on the pH scale, which ranges from 0 to 14. A pH of 7 is considered neutral, while anything below 7 is acidic, and anything above 7 is alkaline. Pure water typically has a pH of 7.

Vinegar, which contains acetic acid, can lower the pH levels of water ... pH deviates too far from the required safe zone on the scale. Chlorine works best at 7.4, so if it drops too low, it ...