Purified water enhanced with minerals & electrolytes added for taste. Purified by Reverse Osmosis. Bottled from water sources meeting requirements of US EPA drinking water regulations. To accurately verify pH, use a calibrated pH meter or high range reagent drops. Trading Symbol: WTER. alkaline88.com. To find out more about Alkaline88 water quality & information, please visit our website alkaline88.com or call 1-866-242-0240. PET. BPA free.