Deep in the Earth's crust, hundreds of miles underground, aquifers are geothermally heated by magma chambers, and that water is propelled through rock with incredible force and energy. As it is pushed through mineral deposits, minerals are dissolved into the water and when it finally makes it's way to the surface, it escapes as steam and mineral-rich (and sometimes very) hot water. Geologist, speculate based on their studies and findings, that the water you are experiencing today is millions of years old and has never touched a human. 
Here at Therapeutic Hot Springs Resort, the water flows directly from 100's of miles beneath the earth's surface. The natural artesian water is then routed to the pools through a 20-foot piping system we are using today. Our 3 mineral pools hold about 450 gallons of water each. Which is drained into the dry lakebed about 150 feet North of the pool house where the Amargosa Voles (#1 endangered species) reside. This is the only area in the world this endangered species lives. Dependent on the higher-than-normal water temperatures year around. It's for this very reason, that anyone using the private mineral pools, must use the pools nude, and shower before entering the mineral pools! This helps to prevent contaminates such as dyes, lotions, oils, and make-up from draining into the voles habitat resulting in devastating harm. So, please be kind and do your part. Take a shower before entering the pools.