What is natural mineral water?
Natural mineral water is a legally protected category in the EU: it must come from an officially recognized underground source, be bottled at source, contain a stable mineral composition, and be free from any treatment beyond removing iron, manganese or sulfur. In the US, FDA rules define it as water with at least 250 mg/L of total dissolved solids from a protected source.
Most bottled waters fall into one of four categories — natural mineral, spring, artesian or purified — and the labeling differences are meaningful. Mineral and spring waters reflect their source geology; purified waters (Aquafina, Smartwater, Dasani) are processed to remove almost all dissolved solids before bottling.
