While Casco Bay may look pristine, toxic pollution is present in its waters, in its sediments, and in the tissues of its living organisms, including clams, fish, birds, and marine mammals. Toxins like heavy metals and organic contaminants can pose a threat to the health of aquatic life and humans.
Casco Bay Estuary Partnership. (2011). Reducing Toxic Pollution Factsheet. Portland, ME: University of Southern Maine, Muskie School of Public Service, Casco Bay Estuary Partnership.