Desert Hot Springs (thermal mineral springs)
Desert Hot Springs is a geothermal geographic area in Riverside County, California with a large grouping of more than twenty hot mineral springs.

History
The hot springs were used for hundreds of years by the Cahuilla Native American peoples long before the early settlers arrived. They referred to the area as Sec-he (boiling water). The springs were an integral aspect of both their creation myths as well as their culture, in the form of nukatem (sacred spirit creatures.) In the 1820s, the Mexican explorer, Don José Romero called the area Agua Caliente (hot water). In 1862, the Homestead Act was put in place by President Abraham Lincoln;  the hot mineral springs were first recorded in 1868 by a government survey party. 

Homesteader, Cabot Abram Yerxa settled there, and he described the springs at Two Bunch and at Seven Palms in his book, On the Desert Since 1913, and called the area Miracle Hill. In the 1930s, Yerxa and fellow homesteader Bob Carr began developing the area, and in  1941 opened a bathhouse. The area was later heavily developed with spa resorts and came to be known as the "Mineral Water Capital of the World".

Water profile
The hot mineral water emerges from the ground at 120°F to 160°F. Both hot and cold springs in the area are tasteless and odorless. The mineral content of the waters are Aluminum Oxide, Barium, Bicarbonate, Calcium, Chloride, Copper, Fluoride, Iron Oxide, Manganese, Magnesium, Silica, Sodium, Sulfate. The ph (units): 8.3 and specific conductance (mmhos): 388.