According to the MPR website
“Minnesota is adding another 500 lakes and stretches of river to its list of impaired waters.
“This new list brings the total number of impaired rivers and lakes to more than 3,600. Impaired means the waters have excess nitrogen, phosphorus, mercury, bacteria or other pollutant to support activities like swimming or fishing, or even to provide healthy habitats for fish and wildlife.”
Find the full article at MPR.com