At the Dolphin Water Products plant, the water has been processed to well above world standards using only the best quality US made water filters. When processing the water we use .5 micron carbon block water filters. The filters remove 99% of chemicals, pesticides, dirt and most other pollutants. Prior to bottling, the water is U/V sterilised which leaves the water in a very pure state. Although most pollutants have been removed from the water. The natural essential minerals remain.