San Pellegrino is produced and bottled at San Pellegrino, Terme, in the Province of Bergamo, Lombardy, Italy. The water may originate from a layer of rock 400 metres (1,300 ft.) below the surface, where it is mineralized from contact with limestone and volcanic rocks. It emerges from three deep springs at a temperature of about 22°C (72°F).
The springs are located at the foot of a Dolomite mountain wall which favours the formation and replenishment of a mineral water basin. The water then seeps to depths of over 700 m (2,300 ft.) and flows underground to a distant aquifer.
San Pellegrino mineral water has been produced for over 600 years. In 1395, the town borders of San Pellegrino were drawn, marking the start of its water industry. Leonardo da Vinci visited the town in 1509 to sample and examine the town’s “miraculous” water, later writing a treatise on the subject.