evidence: Answer: The simple answer is no. There is not any evidence to support choosing bottled or home-treated alkaline water over safe tap water or regular bottled water. [...] The US Environmental Protection Agency (EPA) recommends that town water pH should range between 6.5 and 8.5, with most town water averaging around 7.5. Common bottled waters are usually close to neutral at a pH of 7.0. Bottled alkaline water has a higher pH between 8 and 9. [...] There are possible disadvantages from drinking alkaline water with pH levels above 9. The water will likely have a bitter taste. And for people who regularly take stomach acid production blockers called proton pump inhibitors (PPIs) to maintain a higher stomach pH, drinking strong alkaline water could be dangerous. Adding alkaline water could raise that pH even more and might result in an increased blood pH, which can alter the normal blood levels of chemicals like potassium, especially if they have kidney disease.