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Scientists find PCBs 10,000 meters below the ocean’s surface

Scientists find PCBs 10,000 meters below the ocean’s surface

Much of our work in Madison, Wisconsin in recent years has focused on preventing toxic contaminants such as PCBs (polychlorinated biphenyls) from being released into the environment and entering waterways–and eventually ending up in fish people eat.

Government agencies have told us repeatedly when we’ve raised concerns about PCBs moving into waterways from industrial sources that they will not move because they are not very water soluble and tend to stick to soils. While it is true that PCBs aren’t highly water soluble, and tend to attach to soils and other organic matter–it is well known that soils and other materials with PCBs attached to them can and do move into waterways. Also, it is well-established by scientific studies that PCBs are semi-volatile and can travel through air for long distances.

Now, further refuting the argument that PCBs do not move, a Washington Post article by Chelsea Harvey reports that scientists in the UK have discovered PCBs and related compounds PBDEs (polybrominated diphenyl ethers)  “in some of the ocean’s deepest trenches, previously thought to be nearly untouched by human influence” at levels that rival some of the most polluted waterways on the planet.”

If PCBs do not move far from their source, as Madison’s government officials keep telling us, how did they get to this remote place? Clearly, PCBs can move.

Why does it matter? PCBs and PBDEs, according to the article, “may cause a variety of adverse health effects, including neurological, immune and reproductive issues and even cancer (in humans).” Further, both PCBs and and PBDEs “have the potential to remain intact for long periods of time” and tend to “bioaccumulate,” meaning they can build up in organisms over time. The article cited a study showing that certain organic pollutants, including PCBs and PBDEs “are widespread in fish throughout the world.”

Read the whole Washington Post article here

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