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Contributions of Great Salt Lake Playa‐ and Industrially Sourced Priority Pollutant Metals in Dust Contribute to Possible Health Hazards in the Communities of Northern Utah
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Contributions of Great Salt Lake Playa‐ and Industrially Sourced Priority Pollutant Metals in Dust Contribute to Possible Health Hazards in the Communities of Northern Utah
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Journal Article
Contributions of Great Salt Lake Playa‐ and Industrially Sourced Priority Pollutant Metals in Dust Contribute to Possible Health Hazards in the Communities of Northern Utah
2025
Overview
Communities and ecosystems of northern Utah, USA receive particulate pollution from anthropogenic activity and dust emissions from sources including the Great Salt Lake (“the Lake”) playa. In addition to affecting communities, anthropogenic pollution is delivered to the Lake's playa sediments, which are eroded during dust events. Yet, spatial variability in dust flux and composition and their risks to human health are poorly understood. We analyzed dust in 17 passive samplers proximal to the Lake during fall 2022 for dust flux, the dust fraction of particulate matter, 87Sr/86Sr, and elemental geochemistry. We evaluated spatial patterns of 11 priority pollutant metals and estimated the hypothetical non‐cancer dust and soil ingestion health hazard for six age cohorts. We observed the highest dust fluxes proximal to the Lake's playa. The highest concentrations of and greatest number of metals occurred in and south of Ogden, UT. Sites to the northeast of Farmington Bay had the highest fluxes. Metal concentrations and 87Sr/86Sr suggest that the dust composition near Bountiful represents contributions from anthropogenic sources, whereas the dust composition to the northeast of Farmington Bay reflects the Lake's playa emissions. Evaluations of potential health hazards from dust ingestion suggest that children between birth and 6 years are vulnerable at higher ingestion rates. Thallium, As, Pb, Co and Cr contributed most to the estimated hazard. Among these, As and sometimes Pb are likely derived from the Lake's playa emissions. Thus, suppression of dust emissions from the Lake's playa may decrease possible health risks for children in northern Utah. Plain Language Summary Neighborhoods and natural areas in northern Utah, USA, receive particulate pollution from anthropogenic activities including vehicle emissions, mining and processing, oil refining, and home heating. Particulate pollution also comes from dust blown from a variety of regional sources, including the dry lakebed of Great Salt Lake (hereafter “the Lake”), which has been polluted by decades of anthropogenic activity. Dust deposited in communities contains metals of concern for human health that come from the lakebed and other pollution sources. We collected dust at 17 sites across northern Utah and analyzed the samples for amount, the dust fraction of total material, and geochemistry. We focused our analysis on quantifying the presence of metals of concern and identifying potential dust sources. Metals of concern occurred at higher concentrations in dust south of Ogden relative to the north. Northeast of Farmington Bay, we found higher dust and metals fluxes than the rest of the study area. The potential health hazard for ingestion of dust was highest for children younger than 6. Some of the metals contributing to the health hazard likely come from Great Salt Lakebed sediments. Thus, preventing dust emissions from the lakebed may decrease health risks from dust in northern Utah. Key Points Priority pollutant metals occur in dust in northern Utah with spatially variable composition and flux Priority pollutant metals in dust are attributed to both anthropogenic emissions and dust emissions from the Great Salt Lake playa Children under 6 may be vulnerable to health hazards from ingestion of metals via dust
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,American Geophysical Union (AGU)
Subject
/ Atmospheric Composition and Structure
/ Composition of Aerosols and Dust Particles
/ Dust
/ Dust and dust storms: From physical processes to human health, safety, and welfare
/ health
/ Megacities and Urban Environment
/ Metals
/ Nonlinear Waves, Shock Waves, Solitons
/ Oceanography: Biological and Chemical
/ Pollution: Urban and Regional
/ Pollution: Urban, Regional and Global
/ Remote Sensing and Electromagnetic Processes
/ Samplers
/ Spatial Analysis and Representation
/ Thallium
