The aim of this study is to arrive at a reliable protocol for the extraction of phenolic compounds from industrial wastewater, and as a first step to achieve this, a water sample consisting of four phenolic compounds (phenol, Ortho-nitrophenol, 4,2-Dinitrophenol, paranitrophenol) was prepared at known concentrations, Thus, simulating industrial wastewater, The effect of a set of factors (type of solvent, volume of solvent, pH) on the yield of the process for extracting phenolic compounds from these waters has been studied and tested. We chose four solvents, namely petroleum ether, cyclohexane, chloroform and dichloromethane and tested three different volumes of the extraction solvent (6 ml, 15 ml, 30 mL); as for pH, we chose the values 2, 4, 7, 10. We calculated the phenolic index of the samples obtained by the method of colorimetric analysis (4-amino antiprin method) using an ultraviolet spectrophotometer. Through the yield values obtained, we concluded that the extraction yield increases with the increase in volume of the extraction solvent and the acidity of the media, however, dichloromethane had the best yield, reaching 96 % at pH=2.