Plastic is the top trash left behind in the Mississippi River corridor, according to a new report from the Mississippi River Cities and Towns Initiative (MRCTI) and the United Nations (UN) Environment Programme.
In April, citizen-scientists collected litter in St. Paul, Minnesota; St. Louis, Missouri; and Baton Rouge, Louisiana for the beginning phase of the Mississippi River Plastic Pollution Initiative. They collected 75,184 pieces of litter and 75 percent of that — 660 pounds — was plastic.
The top items included cigarette butts (filters are made of plastic), plastic food wrappers, and plastic beverage bottles. These were followed by plastic foam fragments, aluminum cans, hard plastic fragments, and plastic bags.
“Community members scientifically surveyed areas greater than 20,000 football fields to gather this valuable data with Debris Tracker [technology],” said Jenna Jambeck, an environmental engineering professor at the University of Georgia and National Geographic Explorer. “The results show that there are opportunities for interventions in each pilot city to reduce the quantity of plastic ending up in our environment and the Mississippi River.”
Memphians collected and tagged litter in April, too, using the UN’s Debris Tracker. They found 158 pieces of litter near Mount Zion Church on Weaver Road close to T.O. Fuller State Park. There, they encountered beverage bottles, food wrappers, assorted bits of rubber, metal, and plastic, and more. On Overton Square (the block containing Saltwater Crab, between Diana and Florence St.), they found 124 piece of litter, including straws, cigarette butts, plastic cups, food wrappers, and more.
The Mississippi River corridor is a draining system for 40 percent of the continental United States. Litter in cities gets to the river from storm drains and smaller waterways. It poses a threat to the river’s environmental quality and ecosystem health.
Litter along the river ultimately makes its way to the Gulf of Mexico and into the ocean. Approximately 11 million metric tons of plastic enter the oceans every year, with rivers contributing to a significant portion of that amount.
“We learned a lot through this new approach regarding where waste gathers, how much of it there is, and the type,” said Baton Rouge Mayor Sharon Weston Broome. “We now have valuable information to help support not only existing storm water programs but improve our waste management systems and infrastructure going forward.”