From the data in Table 5, it can be seen that the final effluent from the co-treatment of domestic sewage and leachate complies with the Standard of release for Class 2 waters in the CONAMA Resolutions, except for the value of sedimentable solids for the Barreira do Triunfo STS, which exceeded 2mg/L. As regards the parameter Total Ammoniacal Nitrogen in the Barbosa Lage STS, in December 2008 it was above the permitted value. However, paragraph 7, article 1 of CONAMA Resolution 397/2008 says that this standard does not apply to sanitary sewage, which is the case here. The values for sedimentable solids above the maximum value permitted seem to have been an isolated case, since this has not happened on any other date of monitoring.