Pollution in the Ebri lagoon in the urban area of Abidjan has increased in recent years. Antrophic activities in its watershed threaten the quality of its waters. The objective of this study is to make an inventory of the pollution level of the waters of the Ebri lagoon in order to offer basic elements for urgent solutions. Monthly water samples were taken from the Koumassi, Vridi, Plateau, Cocody and Bingerville sites. Several parameters, namely temperature, pH, conductivity, nitrites, nitrates, phosphates, phosphates, and chlorophylls, were determined. The results show high water mineralization followed by low nutrient contents due to their assimilation for the development of phytoplantonic biomass. The average temperatures do not exceed 28C, with pH values between 7-8. The chlorophyll-a levels, indicative of the eutrophication phenomenon, were compared with those of the evaluation grid of the Organisation for Economic Cooperation and Development (OECD), which shows that the waters of the Koumassi, Vridi and Bingerville sites are eutrophic, and those of the Plateau and Cocody sites are mesotrophic.
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