mineral water

noun1

1. •
   Water from a spring that naturally contains dissolved minerals, often treated in any of several ways (filtering, aerating etc) and bottled; used either therapeutically or by preference, as a beverage, bath, or food ingredient.

   • Bell pushes labelled "Steward" proved to be more than ornamental, even though gassy mineral waters may not be the ideal fare for a narrow-gauge journey. — 1958