What is the acceptable pH level range for safe drinking water?

The acceptable pH level range for safe drinking water is between 6.5 and 8.5. This range is endorsed by both the Environmental Protection Agency (EPA) and the World Health Organization (WHO) because it indicates a balance where water is not overly acidic or basic.

Water with a pH lower than 6.5 can be corrosive, potentially leaching harmful metals such as lead or copper from plumbing systems, which can pose health risks. Conversely, water with a pH higher than 8.5 may lead to scaling in pipes and appliances and could impart unpleasant tastes. Maintaining the pH within the specified range is crucial for ensuring safety, palatability, and the overall quality of drinking water.

This range also supports the natural biochemistry of water and aquatic life, making it not only important for human consumption but also for the broader ecosystem. Thus, the range of 6.5 to 8.5 is considered optimal for drinking water safety.