How Healthy is Your Water?

Inner Onset Bay Snapshot

72
out of 100
Bay Health Index (5-year average)
poor
fair
good
72
72
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

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

5 places to rent a kayak or paddleboard on Buzzards Bay

Try your hand at paddling without having to purchase any gear – these five local outfitters rent kayaks and stand-up paddleboards so you can set off on a paddling adventure today.

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Wareham Selectmen grant 99-year lease of historic Onset Bathhouse to Coalition to create Onset Bay exploration center

The Wareham Board of Selectmen has officially greenlighted the Coalition’s plans to create a new on-the-water exploration center on Onset Bay by signing a 99-year lease of the historic Onset Bathhouse to the Coalition.

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29th Annual Meeting in Cataumet celebrates accomplishments, honors Bay guardian and volunteers

The Coalition celebrated another exceptional year of accomplishments and honored a Buzzards Bay guardian and a remarkable volunteer at our 29th Annual Meeting in Cataumet.

Full Story ›

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: