What is the recommended secondary standard range for pH in potable water?

The recommended secondary standard range for pH in potable water is 6.5 to 8.5, which is important for several reasons. This range helps to ensure that the water is neither too acidic nor too basic, which can be beneficial for both water quality and public health.

Maintaining a pH within this range is crucial for minimizing corrosion of pipes and fixtures as well as preventing the leaching of metals such as lead and copper into the water supply. A pH that is too low (acidic) can lead to higher corrosion rates, while a pH that is too high (alkaline) can cause scaling and reduced water quality.

Additionally, this range supports aesthetic qualities of water, such as taste and odor, which are important for consumer acceptance. Water that falls within the 6.5 to 8.5 pH range is generally perceived as more palatable.

Alternatives outside this range, like a pH lower than 6.5 or higher than 8.5, may indicate problems with the water source or treatment processes, and could lead to undesirable reactions in water distribution systems or issues with consumer satisfaction. Thus, adhering to the 6.5 to 8.5 range is foundational in providing