How healthy are your Sudbury, Assabet & Concord Rivers?
Overall, the Sudbury-Assabet-Concord River system scored a B. The health of the rivers varies with segment: the Upper Sudbury scored a C, the Lower Sudbury a B, the Upper Assabet scored a C+, the Lower Assabet a B, the Upper Concord scored a B, and the Lower Concord a C+.