Coagulation is a chemical treatment in which solid and suspended materials are removed from water by changing the charges of suspended particles that disrupt the charges of oily materials and colloids. Turbidity is removed by using the coagulation process. In this research, two types of chemical coagulants were used: iron chloride and iron sulphate, respectively, at concentrations of 15, 25, 35, and 45 mg/L to the water for each jar using a jar testing device. Concentrations of 15, 25, 35, and 45 mg/L were used in each jar separately. The effect of the concentration of the coagulant on removing turbidity and COD from domestic wastewater was tested. Rapid mixing was tested at three speeds. 105, 125, and 145 for one minute and the slow mixing was fixed at 30rpm for 15 min. These speeds were tested, and the speed that provided the highest percentage of removal of turbidity and COD was chosen. Given the importance of pH in the coagulation process, three pH were tested, pH 6, 7, and 8, and the effect of pH on the removal efficiency of the coagulant was studied. Precipitation was tested at 55 and 25 min. The results showed that iron sulphate was more efficient in removing turbidity and COD at pH 6 than iron chloride. It was observed that 145 per minute. 30rpm in 15 min, sedimentation time 55 min, and pH 6 gives the best results in removing turbidity and the COD of domestic wastewater.