Study finds Fort McKay faces severe dust pollution overlooked by Alberta monitoring
New research shows the Indigenous community is plagued by intense dustfall events driven by large particles from nearby oilsands mines.
FORT MCKAY — A new peer-reviewed study shows the Fort McKay First Nation faces disproportionately high levels of dust pollution, with levels frequently exceeding Alberta's air quality guidelines.
Researchers found the Indigenous community, located in the heart of the oilsands north of Fort McMurray, is plagued by severe dustfall events driven by large particles of dust that are missed by conventional monitoring.
"Looking north, the sky is discoloured," said Jean L'Hommecourt, a former environmental manager for the Fort McKay First Nation.
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The study, published in Atmospheric Pollution Research, warns that continuing to rely on standard air monitoring measures will leave the true impact of dustfall pollution on Fort McKay uncertain.
Led by University of Toronto PhD candidate Kristin Iorio, the research found monthly dustfall volumes in Fort McKay were higher compared to other communities across the Wood Buffalo region.
During 24 months of sampling, Fort McKay's monthly dustfall exceeded Alberta Ambient Air Quality Guidelines 17 times, and more than doubled the acceptable threshold nearly 20 percent of the time.
"We don't know and that is a very dangerous place to be," Iorio said. "And what we don't know can very well hurt us."
Researchers analyzed data collected between late 2022 and mid-2025 by the Wood Buffalo Environmental Association and the Fort McKay Sustainability Department.
Much of the data was gathered using open plastic buckets that captured dust as it fell to the earth. Samples were also collected using ambient air quality tools to measure particulate matter pollution drifting across the region.
Fort McKay received the highest amount of dustfall among all studied locations, about double the next-highest site in Conklin.
"Communities that are more impacted by larger particles are falling through the cracks because there is no monitoring of these larger particles," Iorio said.
Alberta regulates and monitors PM2.5 levels, tiny dust particles that are 2.5 micrometres or smaller. However, the province doesn't have specific rules for particles larger than 10 micrometres (PM10), coarse particulate matter that can get trapped in the nose or throat.
This coarser dust pollution often comes from industrial sites, construction work and mining operations, Iorio said. Other local sources in the oilsands include land clearing, haul road traffic, limestone quarrying and tailings ponds.
"Without regulation of these larger particles, it creates a situation where there's no real oversight," Iorio said. "Even those large particles can have a health impact, because you don't know what's in those particles."
The study's authors recommend major changes in the way Alberta manages and monitors industrial dust.
Iorio said the province needs to establish a formal hourly Alberta Ambient Air Quality Objective for PM10 contamination to capture short-lived, high-intensity dust events. She noted Alberta's existing air quality thresholds for dustfall and airborne particles have not been updated since 1975.
In Fort McKay, she said additional monitoring is needed, including ongoing dustfall collection paired with real-time tracking to determine where exactly the dust is coming from.
Ke Du, a professor in the Department of Mechanical and Manufacturing Engineering at the University of Calgary, said his research echoes the study authors' calls for expanded continuous monitoring and new ambient air guidelines.
"There is a mismatch between the dust pollution and conventional monitoring practices," he said. "Beyond dust, other pollutants can have these same issues. So if we want to design a monitoring program, continuous monitoring is the key."
He said the level of contamination measured in Fort McKay is concerning and further research is needed to investigate the potential implications on local health.
The Alberta Energy Regulator and the Fort McKay First Nation declined to comment on the paper.
Alberta Environment officials say the findings will be considered alongside the "broader body of scientific evidence as Alberta evaluates whether changes to monitoring approaches, ambient air quality objectives or guidelines may be warranted."
Ministry officials said Alberta relies on multiple indicators and programs to assess dust-related conditions and air quality in the region, and is also supporting Fort McKay's community-led dust-monitoring program.
For longtime residents like L'Hommecourt, the research confirms what Fort McKay residents have reported for decades.
"I am very worried for the health of my community," L'Hommecourt said.
With files from CBC News