Phreatic is a Non Profit organization based in Cala Gonone (Sardinia, Italy), founded by a group of extreme environment explorers, scientists and researchers. We started our operations in 2014, in the Supramonte plateau and the Gulf of Orosei. We are mainly active in the Mediterranean basin and our projects cover an ever-growing spectrum of scientific subjects, such as environmental processes, geology, speleology, marine biology and conservation of delicate ecosystems, including: hypogene environments, groundwater resources, marine caves and their integration with coastal environment. Our Mission is to advance knowledge about groundwater resources and marine caves, and to insure their protection and conservation. Cave systems and aquifers are being damaged and destroyed because many people do not understand their value. Most of the coastal and marine areas in the Mediterranean Sea are affected by anthropogenic impact and for most of them there is scarce information; less than 7% of them are designated as Marine Protected Areas. Phreatic supports an ever-growing spectrum of projects aimed at increasing knowledge of these delicate environments and promoting public awareness about their importance.