mineral water 
noun [mass noun]
Water occurring in nature with some dissolved salts present, often bottled and sold as drinking water.The good news is that almost three quarters of the bottled waters we drink are natural mineral waters, with still versions the most popular....
- For instance, the actual mineral content of most mineral waters is less than 500 parts per million.
- And at almost a pound a bottle, Dasani tap water was more expensive than many natural mineral waters.