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Increased Mercury Levels in Fish Due to Dams

Over the years, mercury pollution in fish has caused concern in public health circles. One identifiable cause of mercury contamination is linked to local dams.

  1. Significance

    • According to International Waters, scientists have become increasingly concerned with mercury contamination in dams and reservoirs. According to International Waters, the larger the fish, the more mercury that is likely to accumulate in the tissues of the fish. Small organisms that are at the bottom of the food chain have the lowest levels of mercury contamination.

    Territories with High Levels

    • High mercury levels due to dams have been detected in places such as Northern Canada, Thailand, Finland, South Carolina and Illinois. However, mercury contamination due to dams is much more extensive. Hydroelectric dams have also been linked to mercury contamination. According to David Evers of the Biodiversity Research Institute, hydroelectric dams cause mercury bacteria to thrive, which increases mercury levels in fish.

    Dangers of Mercury

    • According to Business Ethics Magazine, high mercury levels are extremely harmful to individuals who digest mercury-contaminated fish. Mercury is a highly toxic pollutant. Therefore, individuals exposed to high levels of mercury suffer from impaired mental development, nervous system disorders and other health problems.

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