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This article focuses on heavy metal contamination of soils in Nigeria. Since the middle of the 20th century energy generation and industrial production as well as vehicle traffic have caused a serious increase in environmental contamination by trace elements. Port Harcourt is a highly industrialized city of Nigeria with two petroleum refineries, one petrochemical plant and many other oil and non-oil based industries. It is the capital and major city of Rivers State, with rapid development and increasing traffic volume. Port Harcourt, however, unlike most industrial cities in developed countries, lacks good road network and efficient drainage system.