The R&D wing of power major NTPC, has developed a technology to convert Sea water into potable water. The company has applied for patent to produce potable water from the desalination plant set up at the NTPC Simhadri Super Thermal Power Station. The water is treated through flue gas. The project to produce 120 tonne of treated water per day was commissioned last year with an investment of Rs. 8.5 crore.