DESCAR is a software for wastewater dispersion analysis. The program calculates the pollutant concentration in each point of the water considering each one of the pollutant sources and the conditions of the water. The system of simulation of processes of dispersion that DESCAR has, offers to the beginner and the expert programmer, a quick and practical system to evaluate the dispersion of pollutants in the water. The program is based on the operating system Microsoft WINDOWS where one works intensively with the mouse and the graphic windows. We can say, with a certain security that the software DESCAR is one of the best tools, to carry out numeric simulations of water pollution processes. It is interesting for drinking water pollution, ground water pollution, online water pollution monitoring, pollution of drinking water, ground-water pollution, water pollution emergencies and water pollution monitoring.