Why drink the alkaline water from water purifier

Water, we need it everyday. but what is the quality of the water we drink?
It is really good for health or no nutrition in the normal water?
Water purifier can make the high PH water to drink.
Also you can get the acidic water from water ionizer too. can wash fruit.
www.homehealthywater.com
www.skin-analyzer.com
www.ionaircleaner.com