Why is pH important for potable water quality?

The importance of pH in potable water quality primarily lies in its influence on taste and the mobility of contaminants. The pH level of water can significantly affect not only how water tastes to consumers but also the solubility and reactivity of various chemical substances within it. For example, water that is too acidic or too alkaline can lead to undesirable tastes.

Moreover, pH plays a crucial role in controlling the mobility and bioavailability of contaminants. Certain pollutants, such as heavy metals, may become more soluble at specific pH levels, increasing the risk of their presence in drinking water. Conversely, forming complexes at varying pH levels can lead to decreased mobility and bioavailability of contaminants, directly influencing the safety and quality of potable water. Therefore, maintaining an appropriate pH is essential for ensuring that treated water is not only safe for consumption but also palatable.