Toxins of concern in the Salish Sea include persistent organic pollutants (like PCBs), hydrocarbons (from fuel), pharmaceutical compounds, and trace elements (including heavy metals).
Some elements (like copper, selenium, and calcium) are necessary for life at lower concentrations but can be toxic at higher levels. Other elements considered non-essential (like lead and mercury) also can be toxic to aquatic organisms at elevated concentrations. Monitoring trace element exposure in marine organisms is essential to assess potential risks to wildlife and humans.














