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Chemical Valley's Children Have Banned Chemicals in Their Blood

Despite being banned decades ago, hormone shifting chemicals persist in Aamjiwnaang today.

Chemical Valley from the air. (Photo by Michael Toledano)

Canada’s Chemical Valley is an area of 15.5 square miles in Sarnia, Ontario where 40 percent of the world's petrochemical industry is located. You may already be familiar with this industrial cluster of big money and pollution if you caught our documentary, which investigates the complex environmental and political situation in the region.

When we were shooting our documentary earlier this year, we heard the claim from industry insiders that there was no hard evidence to connect the pollutants the Valley spews out with the health defects found in the workers of Chemical Valley, the residents of nearby First Nations reserve Aamjiwnaang or the people of South Sarnia. At that point, there had been no studies to investigate the claims that, for example, Aamjiwnaang has excessive cancer and miscarriage rates. The most infamous study done in Aamjiwnaang found that for every boy born, there were two girls – but even that data is a decade old.


Last week, however, the University of Michigan published their findings from a recent health study they conducted in Aamjiwnaang. The study tested the blood and urine of 42 mother-child pairs from the reserve for chemical exposure. While this study wasn't done on the scale that the community is asking the federal government to perform, it did find that “mothers and children in the Aamjiwnaang region are exposed to a number of environmental pollutants". It also points out that 60 percent of the Valley’s emissions occur within three miles of Aamjiwnaang – where about 850 people live today. And it concluded that the exposures of the test subjects are higher than the average Canadian for organochlorine pesticides and previously banned manmade chemicals known as PCBs, like cadmium, mercury and perfluorochemicals.

The most alarming discovery appears to be the presence of PCBs in the bloodstreams of Aamjiwnaang residents. To clear up the ramifications of this, we spoke to Jim Brophy, an activist and scientist who has been studying the health risks in the Sarnia area for a large part of his career. He called the university’s findings “very disturbing”.

“We don’t know exactly what the health implications are when you find PCBs in a person’s blood or urine when it’s sampled like this," he said. "They can’t tell you, ‘Well, this number means you’ll get cancer,’ or, ‘This number means you’ll have neurological problems or you’ll have attention deficit.’ What we do know is that these chemicals are very powerful agents. PCBs mimic hormones that are either oestrogenic or anti-oestrogenic. And hormones, specifically in young children and in pregnant women, can have huge implications for a person’s lifetime health history. They set you up and make you susceptible for a whole host of problems. So if you find that chemical in your system, the first thing it means is that you have been exposed. The second thing is that these exposures carry risks to them.”


The risk that these chemicals – which can pose as oestrogen hormones in the human body – can cause for exposed human beings is terrifying. Brophy explained this further:

“As we develop, especially in-utero, our whole system – the architecture of our brain, our nervous system, our heart, our lungs and all of our organs – is being programmed. Hormones are the messengers in your body that communicate to cells, genes and chromosomes to do things in a certain order and sequence. If you get the wrong message – if your body thinks that it has oestrogen, but it’s in fact one of the PCBs – it has a very different effect. It binds to these receptors that are on our cells. Then it’s not the oestrogen that’s saying, ‘Do this, do this, do this,’ it’s actually PCBs creating a very different set of communications and changes in the cell structures, in the genetic structures, in the chromosome sequences and so forth. So this is a very big problem.”

Unfortunately, there doesn’t seem to be much action being taken by the industry watchdogs to regulate these PCBs, as it does not appear they’re even monitoring them in the first place, nor do they have any control over these so-called “legacy” chemicals that were banned from use decades ago. We spoke to Dean Edwardson, the go-to industry spokesman and the General Manager of the Sarnia-Lambton Environmental Agency, about these new findings.

“At no time were PCBs manufactured in Sarnia, nor do we monitor for them," he said. "We certainly haven’t done air monitoring [for PCBs]… Now, there’s been an awful lot of work done on PCBs in sediment and that sort of thing in the past, and unfortunately it is a chemical that was used widely in the industry back in the 40s and 50s – primarily in capacitors and transformers and electrical equipment. So unfortunately it’s pretty ubiquitous in the environment right now.”


This toxic, phony oestrogen (that’s apparently ubiquitous) is a cause for concern. While the findings of UoM’s study are limited, they’re a small step forward for the people of Aamjiwnaang who have been raising alerts that their health is being compromised by the massive amount of industry polluting the air around them.

To get a sense of the reaction to this study on the ground in Aamjiwnaang, we spoke to Christine Rogers, a mother of three daughters who helped find subjects to be studied by the university.

“As a mother, it’s not some family somewhere in another location, it’s your family. And the people who participated in this study, those people, I know them… It’s actually pretty sickening. It’s really had an impact on me. I wasn’t sure of the impact it was going to have, but seeing it now, I don’t even know if I want to [continue living here]. I’m making a choice to be here and that’s a conscious decision that I’m making – even when there’s proof in our blood that we shouldn’t be living here. So I’m battling that right now, as a mother…

It’s like confirming your worst fears. Not only did they do the blood samples, they did a developmental study and they also confirmed that the chemicals that they’re finding in our bodies are the ones that are causing developmental delays.”

As for the PCBs, Christine said, “That’s the impact of not properly regulating the chemicals to begin with. Had they had a better understanding of what the chemicals were, would we find them at the levels that they’re at in our bodies today? They need to start regulating chemicals better.”


According to Christine, the community seems somewhat reluctant to participate in health studies like this. “People in the community don’t want to be guinea pigs, [they don’t want] to be looked at that way.” But at the same time, the sheer determination of the environmental activists, who receive little to no support from government, continues to propel this issue forward.

As Jim Brophy told us, “It’s a real credit to the environmental activists in Sarnia that this work continues. The community has not given up. A lot of people would just say, ‘Well look, there’s nothing I can do about it,’ become discouraged, and say, ‘Forget it – I won’t do anything.’ But they’re not going away, they want something done. And I think the fact that the mothers and their children participated is a sign of that.”

Beyond getting better regulations and more studies conducted in the future, the Sarnia community also faces the incredible challenge of removing the PCBs from the air. According to Dean Edwardson, these chemicals are "persistent, and it’ll take a while before they go away”.

Additional reporting by Michael Toledano.

Follow Patrick on Twitter: @patrickmcguire

More toxic towns:

Our Cities Are Killing Us

I Left My Lungs in Aamjiwnaang

WATCH – The Chemical Valley