Toxic ‘Forever Chemicals’ Found in Canadian Sea Otters, Raising Pollution Fears

Researchers from the University of British Columbia have detected alarming levels of toxic “forever chemicals,” or PFAS, in sea otters along the coast of British Columbia — signaling a growing environmental threat to marine ecosystems. The study, published in Environmental Toxicology and Chemistry by Oxford University Press, analyzed liver and muscle samples from eleven deceased sea otters and found eight types of PFAS in every animal tested. The otters’ livers contained the highest concentrations, suggesting long-term accumulation of these persistent chemicals. PFAS — widely used in non-stick coatings, waterproof materials, and firefighting foams — do not break down easily and can linger in ecosystems for decades. Scientists warn that these pollutants can damage organs, disrupt reproduction, and weaken immune systems in wildlife, while potentially entering the human food chain through seafood. Because sea otters live near coastlines and consume fish, they serve as key indicators of marine health. Researchers plan to expand their studies to other marine mammals across Canada to monitor PFAS trends and guide future conservation policies. The findings underscore the urgent need for global action to reduce chemical pollution and protect ocean life.