How Healthy is Your Water?
41.742743, -70.6539

East River Snapshot

68
out of 100
Bay Health Index (5-year average)
poor
fair
good
68
68
out of 100

Supporting Data

East River: Stonebridge Marina (ER1)
Nitrogen, dissolved oxygen, algae, and water clarity measurements taken from floating dock at Stonebridge Marina. (41.742743, -70.6539)
Total Nitrogen
Dissolved Inorganic Nitrogen
Total Organic Nitrogen
Dissolved Oxygen
All Measurements
Average of Lowest 20%
Algal Pigments
Total Pigments
Water Clarity
Yearly Average
Bay Health data is funded in part by the Massachusetts Environmental Trust.
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Volunteer

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 Onset Bay

Staff Spotlight: Devon Bolt

Devon Bolt, student at Northeastern University, reflects on her time as a Research Assistant with the Coalition as part of Northeastern's Co-Op program.

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Your guide to summer 2024 at the Onset Bay Center

Onset Bay Center Summer Camp registration is officially open! Find the best activities for your young adventurers in our comprehensive summer guide.

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Onset Bay Center Hosts 260 Student Scientists from Wareham Public Schools

This fall saw 260 enthusiastic students disembarking from school buses and stepping onto the shores of Buzzards Bay, ready for a full day of immersive outdoor learning at the Onset Bay Center.

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Working to Save Buzzards Bay

The Buzzards Bay Coalition is a membership-supported organization dedicated to improving the health of the Buzzards Bay ecosystem for all through education, conservation, research, and advocacy.

We work to protect clean water on the Bay and on the land: