What is an acceptable drinking water pH range?

The acceptable drinking water pH range is widely recognized as being between 6.5 and 8.5. This range is important for ensuring both safety and palatability of drinking water. A pH of 6.5 is considered the minimum level to prevent it from being too acidic, which can lead to the leaching of metals from pipes and fixtures into the water supply, posing health risks. Conversely, as the pH approaches 8.5, the water remains safe to drink while also being less corrosive, which further protects the integrity of the distribution system and prevents the precipitation of other potentially harmful substances.

Maintaining the pH within this range not only ensures water quality is safe for consumption but also helps in the overall effectiveness of water treatment processes and the stability of the water's chemistry. The other ranges presented are less acceptable for drinking water; they either fall outside of safe consumption limits or could lead to potential health risks from water that is too acidic or too alkaline.