Thermal water is identified as a hot water with composition rich in salts, iodine and gases. It emerges from natural thermal springs, spread all over the earth and practically on every continent, even in the oceans. In fact, the groundwater coming from hot springs is heated by geothermal processes and naturally flows to the land surface at a temperature of 70°F (approximately 21°C) or above. Geothermal springs can be found at places where magma is close to the surface, primarily in hotspot and volcanic districts or spreading ridge areas. The origin of many thermal springs can be found in aquifers, which are underground layers of rock and sand that contain water. Thermal water can also originate from artesian wells.