The purpose of this action is the improvement or expansion of three treatment plants, increasing their treatment capacity and adapting their facilities for the elimination of nutrients, thus improving the quality of the treated water to pour into a sensitive area. Also, some improvements are made in the sanitation networks, incorporating discharges that were not connected, and improving the capacity at some points with new sections of collectors. Finally, a new general EBAR will be executed, replacing the existing one, and a new drive from this and to the WWTP of Beas-San Juan del Puerto-Trigueros.