More than 1 million metric tons of salt is flowing into Lake Michigan each year, according to a new study from the University of Wisconsin-Madison. The findings come as the state has been making significant strides to reduce salt use on roads to curb pollution.
Researchers examined past and current water data on the amount of salt flowing into the lake from 234 rivers and streams, according to Hilary Dugan, the study’s lead author and assistant professor for the Center for Limnology at UW-Madison.
“There’s a tremendous amount of salt going into the lake each year,” said Dugan. “But because of the volume of Lake Michigan, that concentration is still pretty low.”