In the USA it is almost always labeled distilled water.. I've never seen "demineralized water" advertised as the alternate methods are relatively new (at a comp

In the USA it is almost always labeled distilled water.. I've never seen "demineralized water" advertised as the alternate methods are relatively new (at a competing price point).. but they would likely just be called purified, and you'd have to look at the label. Purified water may or may not be demineralized, depending on the method used to purify. Basically any other form of bottled water is about as regulated as homeopathic remedies... Short of killing people, nobody really watches them. This is part of the reason why distilled water is recommended for home medical use like CPAP machines or Neti pots, with purified as second best (though it COULD be equal or better, the term is too generic)