Monthly analytical monitoring allows for knowing the performance of the industrial effluent treatment system. The comments on the values obtained for the analytes quantified in the last samplings highlight that correct functioning of the treatment system is observed in the following removal efficiencies: 98.4% of DBO5; 83% COD; 99.5% ammonium; a noticeable decrease in turbidity and E. coli values less than 50NMP/100ml. In turn, an important development of microalgae in the second aerated lagoon and a high nitrification activity of the system stand out.