Purified water enhanced with minerals & electrolytes. 8.8 Ph added for taste. Purified by reverse osmosis. To accurately verify pH, use a calibrated pH meter or high range reagent drops. Do not use low range ph strips. Bottled from water sources meeting requirements of US EPA drinking water regulations. 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.