What is the permissible pH range for drinking water according to the EPA?

The permissible pH range for drinking water according to the EPA is 6.5 to 8.5. This range is established to protect public health and ensure the safety of drinking water. A pH that falls within this range indicates that the water is not overly acidic or alkaline, which helps in preventing corrosion of pipes and scaling, and maintains the effectiveness of disinfection processes.

A pH lower than 6.5 can lead to corrosive water, which may leach metals like lead and copper from plumbing, posing health risks to consumers. Conversely, a pH higher than 8.5 might indicate water with excessive alkalinity, which could make it unpleasant to drink and may also interfere with the water treatment processes. Therefore, the specified pH range balances safety, taste, and the effectiveness of treatment methods for drinking water.