The treatments of residual waters, they involve to different types of microorganisms like bacteria, fungi, algae and water plants known like macrofits floating and fish as in this one I marry, they have demonstrated to be efficient in the water remediation with contents of organic material and toxic substances as Arsenic, Zinc, Copper, Chrome and Mercury. His importance takes root in his aptitude to be used principally in rural Communities and Houses, due to his low cost and the facility for his installation and operation of the systems of treatment. With the present work it is tried to contribute to the restoration of the river Cumbaza by means of the process of biorremediation consisting of the application of a system of infrastructure (Tank séptico, Reservoir of restoration and Tank by water to being re-used) and the inoculation of regional water plants as Lemna minor (lentejita of w...