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Charles River Watershed Water Quality

FOXBORO

Grade

Water Segment

Average
Compliance Rate

UGH A
A

Upper Middle Watershed
Lower Middle Watershed

92.6%
90.9%

B+
B+
B-

Stop River
Upper Watershed
Lower Basin

82.9%
81.9%
72.8%

C-

Muddy River

58.6%

Average Compliance Rates for Swimming and Boating Standards

100-86

85-71

70-56

jMonitoring Points

A



B



C



D



F

55-40

39-0

2021 Charles River
Watershed Report Card

(based on 2019-2021 bacterial data)

Data Sources: Mystic River Watershed Association, U.S. EPA, Massachusetts Water Resources Authority, MassGIS.
Basemap: Canvas/World Light Gray Base © ESRI and its data suppliers. EPA Region 1 GIS Center Map #13689,7/14/2022

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