"The current WWTP of Don Benito Villanueva de la Serena has been operational since the mid-1990s and can not guarantee the new limit values required by current legislation. It must be borne in mind that since the design of The WWTP to date, have changed the characteristics of the effluent required by current legislation, producing the discharge to sensitive area._x000D_ The purpose of the action is to solve the problems of sanitation and purification that occur in the towns of Don Benito and Villanueva de la Serena as a consequence of the urban development of the area and that the existing facilities have become obsolete. Also included is the construction of a storm tank to laminate the avenues._x000D_ "