What Is The pH Level Of Water? For Tap, Pure, And Filtered Drinking Water"regulations specify that the tap water should have a pH level of 6.5 to 9.5. Water leaving the treatment works should have a pH of 7 and 9."#non-CD Info#data·theberkey.com·Sep 5, 2021What Is The pH Level Of Water? For Tap, Pure, And Filtered Drinking Water