Nutrient samples were collected from thirteen river stations and eight bay stations on July 8th. All bay stations were sampled at the surface; Edgewood Shoal was sampled at the surface and bottom. In the five days prior to sampling, 2.89 inches of precipitation were recorded at T.F. Green.
Among the river stations sampled, the highest total nitrogen (TN), total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) were observed at Blackstone River @ Fairmount St (TN = 1,850 ppb, TDN = 1,915 ppb, DIN = 1,610.5, averages of duplicates). The lowest TN was observed at Moshassuck River @ Higginson Ave (426 ppb). The lowest TDN and DIN were observed at Palmer River @ Rt. 6 (TDN = 372 ppb, DIN = 70.6).
Among the bay stations sampled, the highest surface TN was observed at Phillipsdale Landing (1,330 ppb). The highest surface TDN and DIN were observed at Pawtuxet Cove (TDN = 846 ppb, DIN = 717, averages of duplicates). The lowest surface TN and DIN were observed at Edgewood Shoal (TN = 555 ppb, DIN = 126.8 ppb). The lowest surface TDN was observed at Edgewood Yacht Club (180 ppb).
The next scheduled sampling date is July 22nd, 2026.