A natural spring in the San Pellegrino Terme region of Italy is the source of the sparkling mineral water under the S.Pellegrino Sparkling Natural Mineral Water brand. It is renowned for its delicate bubbles and distinct flavor. As the water passes through subterranean rocks, it naturally mineralizes; to make it more bubbly, carbon dioxide is added during manufacture. The water naturally becomes enhanced with calcium, magnesium, and mineral salts as it passes through subterranean rocks.