The latest environmental report has given the bay a grade of C for the second straight year.
The University of Maryland’s Center for Environmental Science found that the rivers around agricultural areas lost ground last year.
The Choptank River received a C-minus while the upper shore rivers such as the Sassafras Chester and Miles got D’s.
That’s down from the previous year.
The researchers said that much of the problem involved the 50 inches of rain on Delmarva which brought fertilizer and animal waste from the fields into the rivers.