Nutrient samples were collected from 14 river stations and 8 bay stations on November 15th. Edgewood Shoal was sampled at the surface and bottom; all other bay stations were sampled at the surface only. In the five days prior to sampling, there were 0.01 inches of precipitation recorded at T.F. Green.
Among the river stations sampled, the highest total nitrogen (TN), total dissolved nitrogen (TDN), and dissolved inorganic nitrogen (DIN) concentrations were observed at Ten Mile River @ Central Ave. (TN = 2,320 ppb, TDN = 2,470 ppb, DIN = 2,170 ppb). The lowest TN was observed at Moshassuck River @ Higginsin Ave, the lowest TDN was at Palmer River @ Rt. 6 (455 ppb), and the lowest DIN was observed in one of the duplicate samples at Coles River @ Milford Rd. (198 ppb).
Among the bay stations sampled, the highest surface TN, TDN, and DIN were observed at Pawtuxet Cove (TN = 1,110 ppb, TDN = 1,150 ppb, DIN = 908 ppb). The lowest surface TN, TDN, and DIN were observed at Bullock Reach Buoy (TN = 477 ppb, TDN = 419 ppb, DIN = 233 ppb). Chlorophyll a concentrations at the surface bay stations were low this week; concentrations averaged 0.73 μg/L overall with a maximum of 1.11 μg/L at Pawtuxet Cove.
The next scheduled sampling date is November 29, 2023.