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Massachusetts · Northeast Massachusetts

Shawsheen River
water quality.

Follow the Shawsheen through Bedford, Tewksbury, Andover, and Lawrence to the Merrimack.

RouteBedford → LawrencePublic sourceMassDEP Shawsheen River basin monitoring

What you can explore

Open the interactive Rivistry dashboard to view available measurements, station context, historical charts, reference lines, and recent weekly highlights for Shawsheen River.

Open Shawsheen River dashboard

Read the context

River measurements can vary with season, rainfall, temperature, flow, sampling location, and method. Rivistry presents them as evidence to understand and investigate—not as a standalone safety determination.

For the original monitoring information, visit MassDEP Shawsheen River basin monitoring.

Keep following changes

Weekly River Updates compare new observations with previous readings, recent baselines, trends, and applicable reference values.

See Weekly River Updates →