“Uncovering the Hidden Impact of Mining: How Contaminants Travel to Rocky Mountain Snowpacks”

The study on metal contamination in the Rocky Mountains is shedding light on the impact of mining activities on the region’s snowpacks. Led by DRI’s Monica Arienzo, the research team found elevated levels of Mercury, Zinc, Cadmium, and Antimony in snow samples collected from nearly 50 sites across the Rockies. By analyzing data from the National Atmospheric Deposition Program and tracking winter storms back in time, they were able to pinpoint mines in the Pacific Northwest, Idaho, and Montana as the likely sources of contamination.

While the contamination levels were within EPA guidelines, the presence of metal pollutants can accelerate snowmelt by reducing the snowpack’s reflectivity. This study is one of the first to provide a comprehensive look at metal contamination across the greater Rocky Mountains region, highlighting the need for continued monitoring and mitigation efforts.

The researchers also plan to compare their findings with historical mercury contamination records obtained from tree rings, further enhancing our understanding of how pollutants are deposited and spread in the environment. Supported by the National Science Foundation, this study underscores the importance of addressing the environmental impact of mining activities to preserve the integrity of mountain snowpacks and ensure the long-term health of communities across the American West.