Learn about the ideal pH range (6.5-8.5) for drinking water. Understand how the right pH level ensures better health, taste, and overall water quality. Learn how to measure the acidity or alkalinity of water using pH scale, and why it's important for environmental and industrial processes. Find out the pH of regular water and distilled water, and the differences between them. pH stand for the "power of hydrogen" and is a logarithmic scale for how acidic or basic water is. Low numbers are acidic, high numbers basic. pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. The pH of water is a very important measurement concerning water quality.