Thunder Bay was first identified as an Area of Concern (AOC) in 1991. The Thunder Bay Remedial Action Plan (RAP) was established between 1991 and 1997 by Environment Canada and the Ontario Ministry of the Environment. The Thunder Bay AOC extends roughly 28 km along the shoreline and about 9 km off shore of Thunder Bay.
Thunder Bay was classified an AOC because of problems associated with heavy metals, toxic organics, contaminated sediments, fish consumption advisories, impacted biota, beach closings, and conventional pollutants. The majority of these impacts resulted from industrial and urban development along the Thunder Bay waterfront and its adjoining tributaries. A significant loss of species abundance and diversity, reduced recreational opportunities, and a decline in the aesthetic value of the area has also been the result of continual dredging practices, waste disposal, and the prolonged release of pollutants into the environment.
Visit either of the following two locations to access further information about the Thunder Bay Area of Concern:
North Shore of Lake Superior Remedial Action Plan website (an excellent Canadian external link)