I use the large Aldi purified water, however, I still boil it for a minimum of 10 minutes to be on the safe side. Wish it came in glass bottles.
Barbara

No, despite its "purity" sounding name purified water is often water from PWS (public water supply) and run through reverse osmosis. Next time you have a bottle read the label, it's all there. Purified water is known to have NTM. Spring water, on the other hand, is low in NTM. All this according to Dr. NTM guru, Joe Falkinham, who wrote the textbook on NTM in water and more.