Researchers from Utah State University announced on Apr. 9 that dust from the shrinking Great Salt Lake is carrying toxic metals into plants, soils, and potentially human bodies. The study found that leafy vegetables exposed to this dust contained elevated levels of arsenic and uranium even after washing, raising concerns about public health in Utah.
The findings are significant because they show how environmental changes at the lake could affect food safety and community health. Researchers say both direct ingestion of contaminated dust and indirect exposure through local produce may put residents at risk.
Janice Brahney, who supervised the research within the Quinney College of Agriculture and Natural Resources, said, “Dust is an acute health hazard, but rarely measured for composition or bioavailability of potentially toxic components. This new research takes our understanding one step further, measuring how toxic-laden dust could infiltrate Utahn’s lives in pervasive ways.”
According to the study, more than one third of modeled exposure scenarios showed that children’s exposure to toxic metals surpassed levels of concern. The problem is widespread due to many community gardens and small farms in counties bordering the lake where locally grown vegetables are common.
Molly Blakowski, lead researcher on the project now working as a senior scientist overseeing saline lakes in California, said sediments around Great Salt Lake have been contaminated by decades of mining and industrial activity. “The dropping levels of the lake have exacerbated the problem,” she said. “And the lake’s dust is just one part of a complex mixture of atmospheric metal deposition on the Wasatch Front.”
Brahney also pointed out that other toxins such as cyanotoxins and organic contaminants are present in playa sediments but their combined effects remain unstudied so far. She said growing food remains important for Utah culture: “We like to get our hands in the dirt. So we need to make sure the atmosphere isn’t adding contaminants to our local soils and water that we depend upon.”
Blakowski concluded by saying expanded monitoring around Great Salt Lake will help refine risk assessments: “The next step is for expanded dust monitoring around the lake to reduce uncertainties and help researchers refine health risk assessments. And efforts to restore water levels and reduce industrial pollution are complementary strategies that should be pursued.”
The USU College of Agriculture and Natural Resources contributes to public service by providing undergraduate research opportunities while advancing applied knowledge in natural resources management according to its official website. The college uses facilities such as Lytle Ranch Preserve, T.W. Daniel Experimental Forest, faculty labs across several departments including Environment & Society as outlined on its official website. It operates as part of Utah State University according to its official website.
Students at USU College prepare for leadership roles through experiential learning with interdisciplinary collaboration across agriculture, ecology, policy science practices according to its official website. Its Ecology Center has had directors recognized nationally among premier scientists per its official website, while it extends research reach via centers like Center for Colorado River Studies with partnerships throughout western U.S., according to its official website.
