Banned ‘forever chemicals’ fell up to 74% in Canadian seabird eggs over 55 years
Toxic “forever chemical” levels in northern gannet eggs from Canada’s largest seabird colony have dropped 74% from their peak, according to a new peer-reviewed study tracking 55 years of data. Researchers on Bonaventure Island watched PFOS concentrations climb through the late 1990s, cross the threshold considered dangerous to the birds themselves, and then steadily fall as governments and manufacturers began phasing the chemicals out. Because gannets sit near the top of the marine food chain, their eggs essentially record the chemical health of an entire ecosystem — and what they’re recording now is recovery. It’s a rare, clearly documented case of environmental regulation working on a timescale humans can actually see, offering a hopeful blueprint as countries weigh broader PFAS restrictions today.









