Nutrient samples were collected from seven river stations and seven bay stations on September 16th. All bay stations were sampled at the surface and bottom. In the five days prior to sampling, 4.18” of precipitation were recorded at T.F. Green.
Among the river stations sampled, the highest total nitrogen (TN) and dissolved inorganic nitrogen (DIN) were observed at Blackstone River @ Fairmount St. (TN = 1,730 ppb, DIN = 1,548.3 ppb). The highest total dissolved nitrogen (TDN) was observed at Moshassuck River @ Footbridge at Mill St. (TDN = 1,780 ppb). The lowest TN and DIN were observed at Moshassuck River @ Footbridge at Mill St. (TN = 727 ppb, DIN = 605.1 ppb). The lowest TDN was observed at Woonasquatucket River @ Valley St. (TDN = <100 ppb).
Among the bay stations sampled, the highest total nitrogen (TN), total dissolved nitrogen (TDN), and dissolved inorganic nitrogen (DIN) were observed at Pawtuxet Cove (TN = 983 ppb, TDN = 843 ppb, DIN = 562.0 ppb). The lowest surface TN and DIN were observed at Conimicut Point (TN = 500 ppb, DIN = 77.0 ppb). The lowest surface TDN was observed at Edgewood Yacht Club (217 ppb).
The next scheduled sampling date is September 30th, 2026.