What are the government guidelines for PH levels in drinking water?

* Primary Maximum Contaminant Level (MCL): 6.5 to 8.5

* Secondary Maximum Contaminant Level (SMCL): None

World Health Organization (WHO) Guidelines

* Recommended Level: 6.5 to 8.5

* Maximum Allowable Level: 4.0 to 9.0

Note that these guidelines may be subject to change. For the most current information, please consult with the appropriate governmental agencies.