Sea otters residing in the South coast of British Columbia and Vancouver Island have been discovered to have significant levels of hazardous “persistent chemicals,” according to a recent study. Researchers detected heightened amounts of these chemicals, commonly found in various consumer products like food packaging, cosmetics, and electronics, in samples from 11 deceased sea otters collected between 2016 and 2021. The study, led by Dana Price, a master’s candidate at the University of British Columbia, was published in the journal Environmental Toxicology and Chemistry this week.
Price emphasized that the presence of these contaminants in sea otters is a noteworthy discovery, providing a baseline for future comparisons. This study marks the first of its kind conducted in the province. Despite the concerning findings, Price expressed that the results were not unexpected, as similar studies in California, Washington, and Alaska had uncovered the same chemicals.
These chemicals, known as polyfluoroalkyl substances (PFAs), are termed “persistent chemicals” due to their resistance to breaking down in the environment. They pose significant health risks such as organ damage, cancer, and weakened immune systems. Although the study did not attribute any otter deaths to PFAs, the consistent presence of these chemicals in all samples collected raises concerns regarding the long-term health of marine ecosystems.
Comparatively, the levels of PFAs in British Columbia sea otters were lower than those found in some American counterparts. Price suggested that this difference could be attributed to Canadian regulations and the relatively lower human populations in the otters’ habitats. She highlighted that the proximity to urban areas influenced the higher levels of PFAs in otters, as sea otters tend to remain in one location throughout their lives, making it easier to observe the impact of local factors on their health.
The study contributes to the growing body of research on the dangers posed by PFAs. Health Canada has established benchmarks to limit acceptable levels of these chemicals in drinking water, citing potential harm to various bodily systems. The study underscores the need for regulatory decisions on these chemicals, with ongoing debates in Ottawa surrounding the topic.
While the Department of Fisheries and Oceans has implemented some regulations, the vast number of PFAs on the market poses challenges in monitoring them effectively. Price acknowledged the difficulty in tracing the exact source of forever chemical contamination, given their presence in a wide range of products that could enter the ecosystem.
In conclusion, the study sheds light on the concerning presence of persistent chemicals in sea otters, prompting further discussions on regulatory measures to safeguard marine ecosystems and wildlife.