Aqueous Effluents obtained from the discharge pit of a Flow Station- a crude oil and associated natural gas processing plant at Utorogu in Delta State of Nigeria were analyzed for both physico-chemical parameters and heavy metals. The results obtained were compared with the Department of Petroleum Resources (DPR) limits. The result showed that both the Temperature and Total Suspended Solids monthly mean values were below the DPR limits for Temperature and Total Suspended Solids throughout the year while the pH monthly mean values above the DPR (minimum) limits for pH were recorded for the months of April, May, June, July and August respectively. Monthly mean values higher than the DPR limits were recorded for Turbidity for the months of January, February and December; and the months of February and May for Chemical Oxygen Demand; Electrical Conductivity monthly mean values were observed to be relatively high throughout the year while moderate monthly mean values were recorded for Total Alkalinity. The BOD_5, Salinity and Oil and Grease monthly mean values obtained were all below the DPR limits for the three parameters throughout the year. For DO, SO₄^2--S, NO₃^--N & NH₄⁺- N parameters appreciably low monthly mean values were recorded throughout the year. The wastewater samples were found to also contain heavy metals such as: Total Chromium_, Pb²⁺, Total Fe, Zinc and Copper. Monthly mean values higher than the DPR limits were recorded for twelve months for Total Chromium, seven months for Lead, two months for Total Iron and none for Copper and Zinc.