Abstract
<p>This study was aimed at assessing the levels Persistent Organic Pollutant in Challawa River Basin of Kano State, Nigeria. The investigation was particularly plan to assess the presence of PCBs and PAHs in River Challawa and compare the concentrations of the pollutants with the acceptable limit set by Nigerian Standard and other international regulatory agencies. Data were collected using reconnaissance survey; laboratory experiment as well as other secondary data sources. A total of 26 water samples were collected through stratified and systematic random sampling. Three sampling points were chosen and designated A, B and C along the stretch of the river from Yan Danko Bridge to Tamburawa bridge. The result shows that Polychlorinated biphenyls were not detected but polycyclic aromatic hydrocarbons were detected in all the samples analyzed using GCMS. The total concentrations of PAHs in the water samples range between 0.001 to 0.087mg/l. The analytical results revealed that most of the pollutants present in water were at significantly very high levels especially at Zamawa village situated very close to Challawa industrial estate - the major sources of effluent discharge point, making the drinking water around area is not fit for consumption. In conclusion, it can be said that industrial activities had impact on Challawa River basin and its environment. It is recommended among others that the industries should treat their effluents before releasing them into Challawa river basin. </p><p> </p><p>Keywords: persistent, organic, pollutant, challawa river, Nigeria</p>
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