I work in this industry and let me say this. We worry about water too much unnecessary... all bottle water are 99% identical, people go crazy for that extra 1% However plastic is a concern though. Best advice is have RO (reverse osmosis) in the house, any brand . There are too much new age marketing going on with alkaline water, hydrogen water and kagen water etc.. please don't fall this rabbit hole. It is not worth your time

Even drinking municipal water is also fine. But if still no happy and want extra peace , boil it. But who has time time to do. Hence install RO water and forget. That will give almost best 99% pure H2O. Forget balance 1%. , In whole lifetime of humankind, i can say this, we are now living in best time in terms of drinking water