Outer Onset Bay Snapshot
82
out of 100
Bay Health Index (5-year average)
poor
fair
good
82
82
out of 100
Supporting Data
Outer Onset Bay: Onset Bay Marina (OB2)
Dissolved oxygen and water clarity measurements taken from floating dock at Onset Bay Marina. (41.738223, -70.64778)
Dissolved Oxygen
All Measurements
Average of Lowest 20%
Water Clarity
Yearly Average
Outer Onset Bay: Outer Bay – South (OB7)
Nitrogen, algae, and water clarity measurements taken from a boat by the tidal flats on the southern shore of the outer bay. (41.732841, -70.653211)
Total Nitrogen
Dissolved Inorganic Nitrogen
Total Organic Nitrogen
Algal Pigments
Total Pigments
Water Clarity
Yearly Average
Outer Onset Bay: Point Independence (OB8)
Nitrogen, algae, and water clarity measurements taken from a boat off the beach at the end of Bay Street. (41.737248, -70.645568)
Total Nitrogen
Dissolved Inorganic Nitrogen
Total Organic Nitrogen
Algal Pigments
Total Pigments
Water Clarity
Yearly Average
Outer Onset Bay: Onset Island (OB9)
Nitrogen, algae, and water clarity measurements taken from a boat off the northwest shore of Onset Island. (41.734026, -70.645207)
Total Nitrogen
Dissolved Inorganic Nitrogen
Total Organic Nitrogen
Dissolved Oxygen
All Measurements
Average of Lowest 20%
Algal Pigments
Total Pigments
Water Clarity
Yearly Average
Outer Onset Bay: Onset Bay Mouth (OB10)
Nitrogen, algae, and water clarity measurements taken from a boat at the mouth of Onset Bay off the southeast shore of Onset Island. (Note: Data from this sampling station is not included in the Bay Health Index score for outer Onset Bay.) (41.731196, -70.641213)
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.
