The process used by the galvanic industry generates large amounts of wastewater and high contents of chemical oxygen demand (COD) result from the presence of a high load of soluble and insoluble chemical pollutants. Therefore, treatments should be applied to wastewater in order to meet the requirements and standards of the environmental legislation and reduce the environmental impacts caused to water bodies, such as rivers, lakes, seas and oceans. In this context, a method of treatment for the wastewater generated by the galvanic process is used; it is known as electrocoagulation. This treatment method stands out for being easy to operate without the cost of chemical reagents. Basically, electrocoagulation occurs via the passage of direct electrical currents for metallic electrodes, in which oxidation and reduction reactions occur by anodic dissolution of the metal element and the production of hydroxides through the hydrolysis of the water, promoting the removal pollutants. The present study aims to evaluate the pH effect and the direct electrical current on COD reduction in the treatment of the galvanic industry effluent by applying electrocoagulation. The experiments were carried out in accordance with the statistical planning of an independent variable: the initial pH and the direct electrical current. The electrocoagulation reactor consisted of a conical vessel and an electrode mounted with six parallel arranged iron plates operated in a mono-polar mode. It was used as a mechanical stirring system with rod and cylindrical blades, both made by polyvinyl chloride (PVC). The obtained results showed that the COD removal percentage was around 90% to pH values close to 4.0 and the direct electrical current in 3 A. According to statistical calculus, the mathematical model was validated by satisfactorily representing the percentage of COD removal.