Abstract: Systems and methods discussed herein may harness geothermal energy from geothermal wells, such as a retrofitted decommissioned well, that may be utilized for water desalination. Hot fluids extracted from the geothermal well may be utilized to generate geothermal energy that can be utilized to power desalination devices to removal minerals and/or salt from produced water from another well. These hot fluids may be recirculated back into the geothermal well to gather heat and to form a closed-looped system that provides thermal energy to the desalination unit. The treated water may be stored for latter agricultural, municipal, and/or other use, or it may be utilized further hydraulic fracturing.