Great Lakes microplastics contaminate drinking water and fisheries

<>

The Hidden Plastics Crisis Across the Great Lakes

The world’s largest source of fresh surface water is facing an escalating contamination crisis. Microplastics now litter every corner of the Great Lakes. Researchers have documented these particles stretching from Canada’s Chemical Valley, a heavy concentration of fossil fuel plants north of Detroit on Lake Huron, to the remote and otherwise pristine Apostle Islands in Lake Superior.

Sherri Mason, a researcher at Gannon University, documented plastic pellets barely larger than a grain of rice littering the ground in Erie, Pennsylvania. These pellets spill during transfers from rail cars to trucks before reaching local manufacturers.

Emily Kowalski, associate director at Environment Illinois, inspected a glass container filled with industrial plastic pellets known as nurdles. She found these materials along the Wild Mile in the North Branch of the Chicago River.

Scientists and environmental advocates point out that this contamination extends straight into the food chain. Fish populations in the lakes—staples of Midwestern fish fries and fish boils—are contaminated. These fish also form an important part of the diet for Indigenous tribes, immigrant populations, and communities of color across the region.

Health Hazards and Human Exposure Studies

Researchers are tracking the alarming ways microplastics linger inside human and animal tissue. Particles no larger than a grain of rice can trigger heart and brain diseases. This damage occurs either through the physical presence of the particles or from toxic chemicals leaching out of the plastic over time.

Scientific investigations are actively exploring whether microplastics contribute to or directly cause Parkinson’s disease, impaired fertility, premature births, specific cancers, and developmental problems in children.

At the Beckman Institute for Advanced Science and Technology at the University of Illinois Urbana-Champaign, researchers are tracking the impacts of plastics-related chemicals. As part of the Illinois Kids Development Study (IKIDS), scientists have monitored plastic-softening phthalates in the blood of children starting before birth up until age 11. Research coordinator Roxanne Sawhill measured the waist of 6-year-old participant Jamie Headley of Urbana during testing.

Despite these mounting health concerns, regulatory action to limit microplastic pollution remains distant. Manufacturers continue pushing to expand overall plastic production across the United States.

Industry Tactics and Public Misdirection

When confronted about widespread pollution, major industry executives consistently blame consumers. A Chicago Tribune review of thousands of government, scientific, and internal industry documents revealed that corporations borrow these deflection tactics directly from Big Tobacco.

The Tribune analysis found that some of the world’s most powerful companies systematically downplay the environmental and health dangers posed by plastics. At the same time, these corporations heavily overstate the actual capability of recycling programs to manage the waste.

As industrial output grows, researchers, activists, and volunteers are fighting back through multiple avenues. In Dexter, Michigan, University of Michigan associate professor Melissa Duhaime hand-processes harvested flax straw. She works alongside farmer Kyle Thom and graduate student Shiho Apperson to prepare natural fibers for engineering experiments that could replace petroleum-based plastics.

These grassroots efforts, paired with ongoing scientific research supported by the Pulitzer Center’s StoryReach U.S. initiative, highlight the massive scale of the Great Lakes plastics dilemma.