Acquacadda

Acquacadda (S’Acqua Callenti) is one of the small, lightly “thermal” springs found along the margins of the Giba plain (Sulcis, SW Sardinia), in a landscape controlled by faults trending E–W to NW/SE.
Using your material: it belongs to a group of six springs considered thermal in this area (Perdu Spada, Perdu Mannu, Peppi Marroccu, Acqua Callenti, Fonte Calda, Campu Pisanu). The waters are bicarbonate–alkaline–earth, emerging between Cambrian units and Eocene formations, with temperatures generally between 23°C and 30°C, pH ~6.7–6.9, and modest flow rates (roughly 0.4–1.5 L/s, depending on the source).
In national/geothermal catalogs it is also listed as “Acqua Callenti Superiore” in the Nuxis area, confirming it as a recognized warm-water emergence rather than a developed bathing spa.