Sulphur water is the only 'pharmacological' chemical medium used for therapeutic purposes at the Cotilia Spa. The sulphur water of Cotilia is characterised by a good sulphydrometric degree.

This water, following appropriate university clinical trials, has been recognised by the Ministry of Health as effective for the treatment of numerous ENT, pneumological, gastroenterological, gynaecological, arthro-rheumatological, phlebological and dermatological conditions.

The hydrological characteristics of the sulphurous water are public and permanently available to the user in this service charter. Every year, the Terme di Cotilia company publicises these characteristics by displaying them prominently in its illustrative brochure/extract from the services charter.