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When it comes to the Charles, a lot depends on the weather. And Massachusetts saw record rainfall last year.
Long-polluted parts of Boston's major rivers continue to fail EPA's water quality 'report card' - The Boston Globe
Charles River Report Card
The grades are in–see how water quality fared in your favorite section of the Charles River! — Charles River Watershed Association
2021 State of the Anacostia River Full Report
Charles River Report Card
Humber River Watershed TRCA Watershed and Ecosystem Reporting
EPA report card gives mixed grades for Charles, Mystic and Neponset watersheds
Report cards show progress, problems in Boston-area rivers
Water quality grades are in for Boston-area rivers: How did the Charles, Mystic and Neponset score?
