Reverse Diffusion, Desalination & Decontamination (RD3) is a water purification technology developed by Signal One International. This patented technology removes dissolved salts and heavy metals from water at a fraction of the cost of traditional methods. Unlike conventional desalination, RD3 sweeps salts from water rather than forcing them through membranes, eliminating the need for high-pressure pumps, filters, or chemical reagents. This process significantly reduces energy use, maintenance, and overall costs—estimated to be one-tenth of those of competing technologies. Scalable and can be solar-powered, RD3 has wide applications in providing potable water, agricultural irrigation, and water softening, while avoiding the harmful salt discharges associated with ion exchange systems. Additionally, RD3 offers potential for large-scale environmental cleanup, recovering reusable contaminants from polluted rivers, lakes, and oceans.