Nutrient samples were collected from one bay station and seven local river stations on March 8th, 2023. Bay station Phillipsdale Landing was sampled at the surface and the bottom. In the five days prior to sampling, 0.85 inches of rainfall was 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 in one of the duplicate samples collected at Ten Mile River at Roger Williams Ave. The TN, TDN, and DIN were averaging 1,910 ppb, 1,905 ppb, and 1,647 ppb, respectively. The lowest TN, TDN, and DIN were observed at Moshassuck River at Higginson Ave. The TN, TDN, and DIN were 590 ppb, 609 ppb, and 452 ppb, respectively.
Phillipsdale Landing was the only bay station sampled, and recorded a TN of 958 ppb, TDN of 831 ppb, and a DIN concentration of 644 ppb. Chlorophyll a concentration has decreased at the Phillipsdale Landing (0.71 ug/L) since it was last sampled on February 22nd.
Data from additional sampling dates (typically every two weeks) are pending analysis and writeup.