The Ophelia water-well was drilled in 1995 to enable and to ensure the thermal-water supply to the Digne-les-Bains Thermal Baths. It was approved by the Academy of Medicine in 1996.

Located in the Toarcian-Aalenian bedrock, the drilling passed through the Jurassic layers, a thickness of 870m, to extract water at 48°C with a flow rate of 40 m3 / hour.

This highly mineralised water (10g/l) is chlorinated, sulphated, calcic and sodic. It acquires this mineralisation following an underground journey of nearly 50 years, passing over the evaporitic levels of the Triassic period.  It has been recognised as having medicianal benefits for rheumatism, joint pain and respiratory tract diseases.