Spring water refers to natural, mineral-rich water that has been sourced from underground aquifers. Synonyms for spring water include mineral water, artesian water, and natural water. Artesian water is sourced from the same underground aquifers as spring water, but often flows to the surface because of natural pressure. Natural water refers to water that has not undergone any treatment or processing to alter its natural mineral content. Mineral water, like spring water, is rich in minerals that can enhance the body's health. These synonyms can be used interchangeably to describe water that comes straight from nature, and is rich in essential minerals.