Turns out, if you ban 'forever chemicals,' they actually go away

Good news, everyone: Turns out, when you actually stop making certain toxic chemicals, those chemicals start to disappear. Who knew?

This rather obvious, yet deeply satisfying, revelation comes from a new study out of Canada. Researchers tracked levels of notorious “forever chemicals” (PFAS) in northern gannet eggs for a staggering 55 years. The result? A dramatic drop, all thanks to some well-placed regulations. Because, apparently, if you don't dump the poison, it eventually stops showing up in the birds.

The Gannets Get a Break

On Bonaventure Island, a gannet nesting ground in the St. Lawrence Seaway, the eggs of these majestic seabirds were once a toxic time capsule. PFOS, one of the most common and nasty PFAS compounds, peaked at 100 parts per billion. Fast forward to 2024, and that number has plummeted to 26 parts per billion. That’s a 74% decrease. Another charming compound, PFHxS, dropped by 72%. Let that satisfying number sink in.

Raphael Lavoie, an ecotoxicologist involved in the study, put it succinctly: the regulations are “clearly working well.” Which, if you think about it, is both impressive and slightly terrifying that we needed regulations to achieve this in the first place.

The timeline of these chemical declines isn't some happy accident. It lines up perfectly with a series of bans and phase-outs. Chemical giant 3M started backing away from PFOS in the early 2000s. By 2015, major manufacturers had a sit-down with the US Environmental Protection Agency and agreed to ditch both PFOS and PFOA. The United Nations even got in on the action, listing PFOS under the 2009 Stockholm Convention, which basically tells countries, “Hey, maybe stop making this stuff.”

Even militaries, often a reliable source of environmental oopsies, switched to PFAS-free firefighting foams, especially for training. That alone cut a significant pollution source from our waterways. The gannets, unfortunately, were the unwitting canaries in the coal mine, living downstream from all this industrial runoff. By the late 1990s, their eggs were swimming in the stuff.

The Forever Fight Isn't Over

Now, it’s not all champagne and rainbows. While PFOS levels are down, its cousin PFOA has only dropped about 40% and has even seen a slight uptick recently. Because progress, much like a teenager, is rarely linear.

A bigger eyebrow-raiser: when regulators targeted the worst PFAS, chemical companies, ever so resourceful, simply pivoted to newer, smaller compounds. These new chemicals are also problematic but play harder to get, not building up in animal tissues the same way. Their levels are likely on the rise, and the study found early whispers of this shift. Because apparently that’s where we are now.

And remember, “forever chemicals” aren’t just a catchy nickname. PFOS sticks around in the environment and in animals for decades. So even after we stop making it, the cleanup crew is still on the clock. The study’s authors stress that we can’t just pat ourselves on the back and go home. Continued scientific and regulatory oversight is key.

PFAS are a family of at least 16,000 chemicals, used for everything from non-stick pans to waterproof jackets. They simply do not break down naturally and are linked to a delightful array of health issues including cancer, thyroid disease, and immune system problems. The 55-year gannet data set is unique, offering a full, unsettling, and ultimately hopeful arc: the buildup, the peak, and the decline. The 74% drop in PFOS wasn't a fluke; it was the direct result of deliberate action. The next logical step, of course, is to apply that same logic to the new forever chemicals.