The concentration of the different categories of total petroleum hydrocarbons in surface water and sediments of Orashi River were determined for the period of four months. The samples were collected at four different locations along the river. Standard methods were used for the extraction of the samples. The samples were analyzed using Gas Chromatography-Flame Ionization Detector (GC-FID). The results obtained for the surface water showed that, gasoline range organics (GRO) ranged between not detected to 0.846±0.061mg/L, diesel range organics (DRO), 7.625±2.0524 to 11.962±3.293mg/L and lube oil range, 0.25±0.0104 to 1.668±0.051mg/L in the stations and in the months, GRO, not detected to 0.732±0.092mg/L, DRO. 5.399±1.126 to 14.808±2.91mg/L and lube oil range, not detected to 1.346±0.155mg/L. In the sediments, GRO, was within 1.0795±0.512 to 8.6913±2.413mg/Kg, DRO, 17.575±4.7044 to 42.9514±5.5566mg/Kg and lube oil range, 1.343±0.0714 to 4.6995±0.547mg/Kg and in the months, GRO, not detected to 11.9523±4.461mg/Kg, DRO, 22.0206±4.499 to 39.4842±13.496mg/Kg and lube oil range, 0.206±0.104 to 9.8841±3.305mg/Kg. The average percentage concentration of the different categories in the surface water were, GRO, 3.09, DRO, 90.91 and lube oil range, 6.00 in the stations and in the months GRO 2.99, DRO 92.96, and lube oil range, 4.05. In the sediments, GRO, 13.79, DRO, 75.99 and lube oil range, 10.22 in the stations, and in the months, GRO, 12.13, DRO, 79.65 and lube oil range, 8.22. The findings showed that the river is contaminated with total petroleum hydrocarbons and therefore urgent remediation is needed to clean-up the river.