Bottled water is becoming more and more popular. Most commonly, bottled water are of two types: spring water and mineral water.
Spring water comes from underground water springs. It receives the same filtration treatment that all water receives, including tap water. different brands of spring and mineral waters will have different amounts of minerals depending on their source.
Mineral water contains minerals or other dissolved substances that alter its taste or give it therapeutic value. Salts, sulfur compounds, and gases are among the substances that can be dissolved in the water. Mineral water, which is often effervescent, and can be prepared or can occur naturally. This water contains more than 250 ppm (parts per million) of TDS (total dissolved solids) that are present at the point of emergence from the source.
Keep in mind that the source of bottled water must be listed on its label. Not all bottled water comes from a spring. Many bottles of water contain nothing more than tap water, yet still cost money. Look for "municipal" sources or words like "public water source" for clues. One way to know that bottled water is actually tap water is to read the label. Dasani and Aquafina brands of bottled water are regular tap water, for example.