A plant has been designed for the treatment of municipal wastewater in the District of Santiago de Chuco, using the design methodology according to the National Building Regulations, DS N ° 011-2006-HOUSING, standard OS.090 Water treatment plants Residual; And the Technical Regulation of the Drinking Water and Basic Sanitation Sector, RAS-2000, as a complementary methodology. It began with the compilation of necessary bibliographical information, projection of populations, and methodology of design of treatment units, among others. Subsequently, the flow measurements were taken to determine the sampling protocols that were between 11:00 and 13:00 hours; (BOD5, STD, SS, COD, conductivity, oils and grease, pH, Temperature), the results of which are referential, due to the fact that there is some uncertainty in The means for conducting the analyzes. Following the design methodology mention...