This study intended to characterize raw refinery and car wash wastewater samples. Samples were taken from Kewrgosk oil refinery and car wash location in Erbil City, Kurdistan Region, Iraq. Wastewater samples were analyzed for many parameters such as oil and grease, ammonia-nitrogen, total suspended solids (TSS), chemical oxygen demand (COD) and nitrite, etc. The results were compared to Iraqi standard effluent regulations. Moreover, the research aimed to suggest a suitable treatment for types of wastewaters. Detailed about dissolved air flotation(DAF) and moving bed biological reactor (MBBR) were explained and described to treat wastewater samples. Results indicated that the wastewater parameters exceed standard limits and need treatment. Results illustrated that DAF removed 70-75%, 92.5%, and 92 % of oil and grease, COD, and TSS, respectively. While, MBBR removed 99%, 55- 100% and 85 of oil and grease, COD, TSS, respectively. Combined treatment of DAF and MBBR was effective to remove oil and grease and organic compounds