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Charles River Watershed Water Quality
Grades and Compliance Rates - Calendar Year 2020

MENDON

FRANKLIN

BELL INGHAM

FOXBORQUGHl

Upper Middle Watershed
Lower Middle Watershed
Stop River
Upper Watershed
Lower Basin

Kvrentham

Muddy River

Miles

Average Compliance Rates for Swimming and Boating Standards

A



B



C



D



F

100-86

85-71

70-56

55-40

39-0

Monitoring Points

2020 Charles River
Watershed Report Card

(based on 2018-2020 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 #13390, 7/14/2021

	

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