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Fish within the Great Lakes region of North America are an invaluable resource with economic and cultural significance. While these fish are vital, they contain chemical pollutants that are hazardous to human health. One such man-made group of chemicals, polychlorinated biphenyl compounds (PCBs), continue to be a problem long after the ban on production (1979). The objective of this research thesis was to assess PCB contamination in fish within the Great Lakes Region. This objective was completed by determining the sources of PCB contamination, defining the ecosystem characteristics that significantly affect fish contamination, predicting when it will be safe to consume a desired amount of fish, identifying which water bodies have higher contamination, and determining if PCBs have significantly declined since the early 1990s. The assessment of inland lake contamination revealed that lakes impacted by point sources of PCBs can de differentiated from lakes whose only source of PCBs is atmospheric. Principal Component Analysis of PCB concentrations in common fish species revealed that lakes impacted by local, point sources of PCBs had congener distributions in fish dominated by heavier congeners. Similar results were obtained for sites in the Great Lakes; PCBs in Lake Superior fish were found to be derived primarily from atmospheric deposition while the lower lakes had significant contributions from local sources.

An Assessment of Polychlorinated Biphenyl Contamination in Fish from the Inland and Great Lakes of Michigan