The pH of tap water is typically 7.5.
pH is defined as the negative logarithm of H+ ion concentration. Hence the meaning of the name pH is justified as the power of hydrogen. The definition of pH also says that the measure of hydrogen ion concentration used to measure the acidity or alkalinity of a given solution.
The pH of water is equal to 7. But the source of water alter the pH value from where it is obtained. The pH of a source of water can naturally alter. Some types of rock and soil, such as limestone, can more effectively neutralize acid than other rock and soil types, such as granite.
- The pH of tap water is typically 7.5
- Surface water usually has a pH value of 6.5 to 8.5
- Groundwater appears to have a pH of 6.0 to 8.5.