How Healthy is Your Water?

Inner Onset Bay Snapshot

77
out of 100
Bay Health Index (5-year average)
poor
fair
good
77
77
out of 100

Supporting Data

Inner Onset Bay: Onset Town Pier (OB1)
Dissolved oxygen and water clarity measurements taken from floating dock at Onset Town Pier. (41.740892, -70.659368)
Dissolved Oxygen
All Measurements
Average of Lowest 20%
Water Clarity
Yearly Average
Inner Onset Bay: South Inner Bay – East (OB3)
Nitrogen, algae, and water clarity measurements taken from private dock on the east side of the inlet to Onset Bay. (41.734355, -70.664112)
Total Nitrogen
Dissolved Inorganic Nitrogen
Total Organic Nitrogen
Algal Pigments
Total Pigments
Water Clarity
Yearly Average
Inner Onset Bay: South Inner Bay – West (OB3A)
Dissolved oxygen and water clarity measurements taken from private dock on the west side of the inlet to Onset Bay. (41.734777, -70.665905)
Dissolved Oxygen
All Measurements
Average of Lowest 20%
Water Clarity
Yearly Average
Inner Onset Bay: Wickets Island (OB6)
Nitrogen, algae, and water clarity measurements taken from a boat off the northeast shore of Wickets Island. (41.73877, -70.652306)
Total Nitrogen
Dissolved Inorganic Nitrogen
Total Organic Nitrogen
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

10 beautiful beaches on Buzzards Bay to visit this summer

Some of these Buzzards Bay beaches are crowd favorites, while others are hidden gems waiting for you to discover.

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Coalition members share 14 of their favorite places on Buzzards Bay

To kick off summer, our members shared 14 of their favorite places: harbors, beaches, trails, and all the other fantastic spots where people like you can discover Buzzards Bay summer long.

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Officials and community celebrate long-awaited ribbon-cutting of the Coalition’s Onset Bay Center

Officials and community celebrate long-awaited ribbon-cutting of the Coalition’s 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: