USD Students Find Heavy Metals and Microplastics in San Diego’s Bays With New Booms Made From Recycled Materials
By Abbie Black / CBS8 / August 15, 2025
What appears to be pristine water in San Diego Bay is hiding a disturbing secret beneath the surface.
University of San Diego graduate students working with a local company have discovered alarming levels of heavy metals, microplastics and invasive species in Mission Bay and San Diego Bay using innovative cleanup booms made from recycled materials.
The partnership, called 24/7 Blue, pairs USD students with San Diego-based Earthwise Sorbents to test sustainable cleanup technology that could serve as a model for ports and marinas nationwide.
“It’s unbelievable the amount of material that we are picking up,” said Dr. Michel Boudrias, who chairs USD’s sustainability task force. “We’re picking up 30 times the amount of heavy metals that are typically out there.”
The 5-pound, 10-foot booms are placed in local waters for two to three months before being replaced. When flipped over, the seemingly clean-looking devices reveal the extent of contamination lurking in San Diego’s waterways.


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Editordude: This is an expanded version of
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