PFOS in Canadian Seabird Eggs Falls 74% Over 55 Years as PFAS Rules Bite
Updated
Updated · The Guardian · May 11
PFOS in Canadian Seabird Eggs Falls 74% Over 55 Years as PFAS Rules Bite
3 articles · Updated · The Guardian · May 11
PFOS in northern gannet eggs from the St. Lawrence basin fell to 26 parts per billion by 2024 from a 100 ppb peak, according to a new peer-reviewed study tracking 55 years of samples.
The decline followed regulatory pressure on major PFAS makers, 3M’s move away from PFOS, a 2015 EPA phaseout agreement covering PFOS and PFOA, and broader restrictions in Canada, Europe and under the Stockholm convention.
PFOA levels dropped about 40% and PFHxS fell roughly 72%, reversing a steep rise from the late 1960s through the late 1990s when PFAS use expanded with little oversight and contamination reached ecotoxicological risk levels for the birds.
The study still flags lingering risks: newer replacement PFAS may be increasing, are harder to detect in bird eggs, and older compounds such as PFOS can persist in wildlife and the environment for decades.
Old 'forever chemicals' are fading, but are their replacements creating a new, hidden environmental crisis?
If regulations on toxic chemicals work, why do they still contaminate over 99% of people worldwide?
PFAS in Canadian Seabird Eggs Plummet by 74%: Regulatory Success, Ongoing Challenges, and the Path Forward (2024 Report)
Overview
This report highlights a remarkable drop in PFAS levels found in Canadian seabird eggs, especially those of the northern gannet, by 2024. Northern gannets, which act as environmental sentinels, were once at high risk due to water pollution from manufacturing centers. This pollution led to the accumulation of PFAS in their environment and eggs, especially as PFAS production sharply increased from 1969 to the mid-1990s because of widespread industrial use and little regulatory oversight. The significant reduction in PFAS levels now seen in seabird eggs shows that recent regulations and efforts to control these chemicals are working, offering hope for ecosystem recovery.