In India, Bureau of Indian Standards (BIS) is responsible for packaged drinking water regulations. BIS has published two Indian Standards for Packaged Drinking Water (IS
13428 for packaged natural mineral water and IS 14543 for packaged drinking water). Both the products are under mandatory certification. Packaged water companies are required to perform routine quality tests to ensure the finished product meets BIS standards for water quality and safety

For a product to be considered “packaged water”, it must NOT contain sweeteners or chemical additives (other than minerals, flavors, extracts or essences) and must be sugar-free and calorie-free.

The BIS defines two types of water as follows:

• Packaged Natural Mineral Water: Contains no less than 250 parts per million of total dissolved solids (minerals). No minerals can be added to this product.
• Packaged Drinking Water: Packaged water is originally sourced from a well that taps a confined aquifer (a water-bearing underground layer of rock or sand). Such water if labeled as “purified” may be subjected to treatments such as, multistep filtrations, e.g., through sand, gravels, carbon, softener, micron filters, membranes, followed by disinfection, aeration, re-mineralization or any other method to meet the prescribed standard before being packed.

The mineral content in Purelyf is maintained at a level so that water does not lose its natural properties and taste even after multistage filtration carried out to ensure elimination of any contamination with harmful element including pathogen.