The first round of sampling revealed that the Lakes are home to between 1,500 and 1.7 million plastic particles per square mile, with Lake Erie housing the largest concentrations. Dr. Sherri “Sam” Mason of the State University of New York (SUNY) at Fredonia, Dr. Lorena Rios-Mendoza of University of Wisconsin, and Dr. Marcus Erikson of 5 Gyres Institute have determined that much of the plastic they found was actually microbeads, found in many brands of toothpaste and facial and body scrubs. These tiny pieces of plastic are less than a millimeter in diameter, much too small to be filtered out by wastewater treatment facilities before that water is released into nearby lakes and rivers.
Recent News
- New aquaponics curriculum brings STEM and sustainable agriculture to the classroom
- Illinois-Indiana Sea Grant welcomes new coastal engineering and community resilience specialist
- Meet our Grad Student Scholars: Xiaoli Xing
- IISG accepting applications for 2025 Graduate Scholars
- Illinois-Indiana Sea Grant communications coordinator joins the team
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🚨🚨 New episode alert!🚨🚨 Teach Me About the Great Lakes episode 105 is out!
The nonprofit Freshwater Future has had much success working with local communities toward cleaner, safer drinking water. Jill Ryan, executive director, and Ann Baughman, associate director, patiently play Stuart’s favorite game, counting down the top five threats to our drinking water as they know them. SPOILER ALERT: Two of them surprised Stuart.
Tune in via the link in bio.

Don’t miss out on the latest edition of our “Making Waves in Education” newsletter! Dive into innovative professional learning opportunities and stay updated on upcoming events like the annual Shipboard Science Workshop and a new Crayfish and Freshwater Ecosystems Curriculum Workshop. Perfect for Illinois and Indiana educators passionate about environmental education. Check it out at the link in bio.

🚨🚨 New episode alert!🚨🚨 Teach Me About the Great Lakes episode 104 is out!
This episode is a scientist’s dream and a nightmare of would-be organizational acronyms. Dr. Drew Gronewold, with his multiple titles and international work, introduces the TMATGL team to the Global Center for Climate Change and Transboundary Waters and the value of data. (As if we didn’t know…)
Tune in via the link in bio.

Climate change is making it harder to manage sand on Chicago’s beaches, with rising water levels, bigger storms, and stronger winds. IISG-funded research led by C. Robin Mattheus and a team of ISGS scientists tracked sand distribution along 18 beaches—offering the first regional, high-resolution assessment of the Chicago shoreline. #SeaGrantFunded
Read more about this groundbreaking study at the link in bio.
