Episode 25, May 22, 2025
The seventh graders who changed Wisconsin’s lakes
In this episode, we uncover the story of how a popular watercraft inspection program evolved from a middle school science project in Northern Wisconsin.
The Clean Boats, Clean Waters program trains volunteers to perform boat and trailer checks and educate lake users about preventing the spread of aquatic invasive species (AIS). Since 2004, inspectors have checked over two million boats across Wisconsin and connected with countless people about the importance of cleaning, draining, and drying their watercraft.
The program is one of the most robust and successful in the country, but it had humble beginnings: a middle school science class in the early 2000s. Maree Stewart, one of the three Minocqua-area students behind the project, explains how the group wanted to fight the spread of Eurasian watermilfoil in Northwoods lakes.
“Living in Minocqua, there’s lakes everywhere, and so that was a cause that was important to all of us,” said Stewart.
With the help of dedicated teachers and mentors, the team submitted a proposal about AIS educational kits to a national competition for student-led STEM projects. It was a long shot for three kids from a small town, so imagine their surprise upon learning they were a top-ten finalist.
What unfolded next was an unforgettable experience — a trip to Disney World, a Shark Tank-style pitch, the euphoria of winning $25,000 — that forever changed AIS prevention and lakes across Wisconsin and the Great Lakes region.
This episode is dedicated to Luke Voellinger, one of the original student founders who passed away in 2019.

Students Maree, Janelle, and Luke, in the original Clean Boats, Clean Waters shirts, pose at their educational booth.

The students worked in close collaboration with Laura Marquardt, Sandy Wickman, and Lisa Ahlers.
Resources
Get involved in Clean Boats, Clean Waters
Get involved in the Great Lakes Landing Blitz
Boats per capita in the US
Christopher Columbus Fellowship Foundation grants
Eurasian watermilfoil
Eurasian watermilfoil spread – interactive map
Timeline of AIS introductions and policy in Great Lakes region
Invasive species rule NR 40
Thanks to our guests
Maree Stewart, student award winner
Lisa Ahlers, former teacher, Minocqua, Wisconsin
Laura Marquart, formerly Extension Lakes
Erin McFarlane, Extension Lakes
Bijit Khadka, University of Wisconsin-Madison
And thanks to our other contributors:
Sandy Wickman, formerly Wisconsin Department of Natural Resources
Bob Korth, formerly Extension Lakes
Judi Fellows, CBCW inspector
Linda Bogdala, CBCW inspector
Keith Montgomery, CBCW coordinator
Mary Doden, CBCW coordinator
Credits

Bonnie Willison | Executive Producer
Video and Podcast Producer
What I do at Sea Grant
Bonnie produces videos and podcasts about Great Lakes science and outreach for Wisconsin Sea Grant.

Jenna Mertz | Writer, Producer
Writer
What I do at Sea Grant
Jenna writes about the research and outreach work of Wisconsin Sea Grant to build understanding of and stewardship for Wisconsin’s waters and the Great Lakes.

Tim Campbell | Producer
Aquatic Invasive Species Program Manager, National AIS Liaison
What I do at Sea Grant
Campbell engages communities, organizations, local government officials and other coastal stakeholder groups and helps them incorporate aquatic invasive species (AIS) prevention actions into their existing activities.
He also works closely with the numerous professionals working on AIS issues statewide and nationally to coordinate education and outreach efforts.

Nichole Angell | Producer
Program Specialist, Great Lakes Commission
What I do at GLC
Nichole works on various Aquatic Invasive Species projects including the Invasive Mussel, European Frog-bit, and Phragmites Collaboratives, as well as the Great Lakes AIS Landing Blitz. She also provides staff support to the Great Lakes Panel on Aquatic Nuisance Species.