**3. Results and discussion**

The first strategic sampling area was carried out at the entrance of the process with water from the well, taking the NMX-AA-003-SCFI-2019 standard as a sample reference, the total hardness of this water was evaluated in order to identify the presence of salts of calcium and magnesium ions which are responsible for incrustations and can generate failures and loss of efficiency in the processes. In **Table 2**, the results are shown, which indicate that this concentration of salts will not generate any type of interference in industrial processes.

On the other hand, TOC and COD were measured in the wastewater from each process in order to quantify all the carbon present in the organic matter that dissolves or can be suspended in the water and thus, establish the amount of oxygen consumed in the total chemical oxidation of organic constituents present in the water through COD values. Complementary to the characterization of

