How Healthy is Your Water?

Starting at Halfway Pond in Plymouth, the freshwater Agawam River flows through forests and cranberry bogs on its way toward Wareham. The Agawam River is home to one of Buzzards Bay’s largest populations of river herring, which migrate upstream each spring to spawn in fresh water. The weir at Route 28 separates the freshwater portion of the Agawam River from the tidal estuary.

Agawam River – Fresh Snapshot

The Buzzards Bay Coalition does not calculate a Bay Health Index score for Agawam River – Fresh because it is a freshwater location. The Bay Health Index is only used to measure the health of coastal waters, including harbors, coves, and tidal rivers.

Supporting Data

Agawam River – Fresh: Cranberry Highway (Station AG3)
Nitrogen, dissolved oxygen, algae, and water clarity measurements taken from shore at Cranberry Highway (Route 6) on the north side of the culvert. (41.76261, -70.67575)
Total Nitrogen
Dissolved Inorganic Nitrogen
Total Organic Nitrogen
Dissolved Oxygen
All Measurements
Average of Lowest 20%
Algal Pigments
Total Pigments
Water Clarity
Yearly Average


Become a Baywatcher

Help the Buzzards Bay Coalition keep an eye on the health of the water in your community. Become a Baywatcher, and you can volunteer as a "citizen scientist" on the water this summer.

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Top Stories on the Agawam River

10 Buzzards Bay herring runs to visit this spring

With spring comes the sound of songbirds, the sight of colorful flowers, the feeling of warm sunshine – and migratory river herring returning to Buzzards Bay’s waters. Catch a glimpse of river herring at one of these 10 herring runs around the region.

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What 25 years of river herring data tell us about restoring these ‘foundation’ fish in Buzzards Bay

Data collected over the past 25 years offer a snapshot of the decline of river herring and hint at possible solutions to bring their populations back to health in Buzzards Bay and beyond.

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Coalition celebrates accomplishments, honors guardians of Buzzards Bay at 28th Annual Meeting in Onset

At its 28th Annual Meeting in Onset, the Coalition celebrated an exceptional year of accomplishments and honored three outstanding guardians of Buzzards Bay.

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