Nutrients Sampling

Nutrient samples were collected from seven river stations on April 16^th and seven bay stations 17^th. All bay stations were sampled at the surface and bottom except for one station (India Point Park) which was only sampled at the surface. In the five days prior to sampling, 0.80 inches of precipitation were recorded at T.F. Green. Due to a laboratory issue, some ammonia and dissolved inorganic nitrogen (DIN) results for the bay and river samples are not available. The DIN for both the bay and river stations will be based on the results available.

Among the river stations sampled, the highest total nitrogen (TN) was observed at Blackstone River @ Slater Mill (TN = 953 ppb). The highest total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) was observed at Pawtuxet River @ Broad St. (TDN = 930 ppb, DIN = 673 ppb). The lowest TN and TDN were observed at Moshassuck River @ Footbridge at Mill St. (TN = 569 ppb, TDN = 517 ppb). The lowest DIN was observed at Blackstone River @ Bikepath Bridge. (DIN = 614 ppb).

Among the bay stations sampled, the highest surface total nitrogen (TN), total dissolved nitrogen (TDN), and dissolved inorganic nitrogen (DIN) were observed at Phillipsdale Landing (TN = 1,250 ppb, TDN = 975  ppb, DIN = 801 ppb). The lowest surface TN and DIN concentrations were observed at Conimicut Point (TN = 504 ppb, DIN = 79 ppb). The lowest surface TDN was observed at the Bullock Reach Buoy (TDN = 178 ppb).

The next scheduled sampling date is April 30, 2025.

Nutrient samples were collected from twelve river stations on April 2^nd. In the five days prior to sampling, 0.25 inches of precipitation were recorded at T.F. Green. 

The highest total nitrogen (TN), total dissolved nitrogen (TDN), and dissolved inorganic nitrogen (DIN) were observed at Ten Mile River @ Central Ave. (TN = 2,040 ppb, TDN = 2,020 ppb, DIN = 1,731). The lowest TN, and TDN concentrations were observed at Moshassuck River @ Footbridge at Mill St. (TN = 546 ppb, TDN = 543 ppb). The lowest DIN concentration was observed at Coles River @ Milford Rd. (DIN = 160 ppb).

The next scheduled sampling date is April 16, 2025.

Nutrient samples were collected from seven river stations and eight bay stations on March 19^th. All bay stations were sampled at the surface and the bottom. In the five days prior to sampling, 2.21 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 @ Slater Mill (TN = 1,220 ppb, TDN = 1,160, DIN = 810). The lowest TN, and TDN concentrations were observed on the Woonasquatucket River @ Manton Ave. Bridge (TN = 624 ppb, TDN = 617 ppb). The lowest DIN was observed at Moshassuck River @ Footbridge at Mill St. (DIN = 407 ppb).

Among the bay stations sampled, the highest surface total nitrogen (TN), total dissolved nitrogen (TDN), and dissolved inorganic nitrogen (DIN) were observed at Phillipsdale Landing (TN = 1,450 ppb, TDN = 1,290 ppb, DIN = 889 ppb). The lowest surface TN was observed at Pomham Rocks (TN = 766 ppb). The lowest surface TDN and DIN concentrations were observed at Conimicut Point Surface (TDN = 475 ppb, DIN = 223 ppb).

The next scheduled sampling date is April 2, 2025.

Nutrient samples were collected from six river stations on March 5^th. In the five days prior to sampling, there was no precipitation recorded at T.F. Green. 

The highest total nitrogen (TN), total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) concentrations were observed at Pawtuxet River @ Broad St. (TN = 1,590 ppb, TDN = 1,770 ppb, DIN = 1,533 ppb). The lowest TN, TDN, and DIN concentrations were observed on the Moshassuck River @ Footbridge at Mill St. (TN =558 ppb, TDN = 592 ppb, DIN = 441 ppb).

The next scheduled sampling date is March 19, 2025.

Nutrient samples were collected from six river stations on February 19^th. No samples were collected from bay stations due to adverse weather conditions. In the five days prior to sampling, 1.98 inches of precipitation were recorded at T.F. Green. 

The highest total nitrogen (TN), total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) concentrations were observed at Blackstone River @ Slater Mill (TN = 1,810 ppb, TDN = 1,960 ppb, DIN = 1,533 ppb). The lowest TN, TDN and DIN concentrations were observed at Woonasquatucket River @ Manton Ave. Bridge (TN =625 ppb, TDN = 711 ppb, DIN = 480 ppb).

The next scheduled sampling date is March 5, 2025.

Nutrient samples were collected from twelve river stations on February 5^th. No samples were collected from bay stations due to adverse weather conditions. In the five days prior to sampling, 0.74 inches of precipitation were recorded at T.F. Green. 

The highest total nitrogen (TN), total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) concentrations were observed at Ten Mile River @ Central Ave. (TN = 3,160 ppb, TDN = 3,890 ppb, DIN = 3,148 ppb). The lowest TN, TDN and DIN concentrations were observed at Coles River @ Milford Rd. (TN =663 ppb, TDN = 727 ppb, DIN = 289 ppb).

The next scheduled sampling date is February 19, 2025.

Nutrient samples were collected from six river stations on January 22^th. No samples were collected from bay stations due to adverse weather conditions. In the five days prior to sampling, 0.79 inches of precipitation were recorded at T.F. Green. 

The highest total nitrogen (TN), total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) concentrations were observed at Pawtuxet River @ Broad St. (TN = 1,920 ppb, TDN = 2,110 ppb, DIN = 1,734 ppb). The lowest TN and DIN concentrations were observed at Moshassuck River @ Footbridge at Mill St. (TN =777 ppb, DIN = 657 ppb). The lowest TDN concentration was observed at Woonasquatucket River @ Manton Ave. Bridge (896 ppb).

The next scheduled sampling date is February 5, 2025.

Nutrient samples were collected from eleven river stations on January 8^th. No samples were collected from bay stations due to adverse weather conditions. In the five days prior to sampling, trace amounts of precipitation were recorded at T.F. Green. 

The highest total nitrogen (TN), total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) concentrations were observed at Ten Mile River @ Central Ave. (TN = 2,760  ppb, TDN = 2,970 ppb, DIN = 2,729 ppb – averages of duplicates). The lowest TN, TDN and DIN concentrations were observed at Coles River @ Milford Rd. (TN = 641 ppb, TDN = 650 ppb, DIN = 209 ppb).

The next scheduled sampling date is January 22, 2025.

Nutrient samples were collected from seven river stations on December 24^th. No samples were collected from bay stations due to adverse weather conditions. In the five days prior to sampling, 0.28 inches of precipitation were recorded at T.F. Green. 

The highest total nitrogen (TN) and total dissolved nitrogen (TDN) were observed at Blackstone River @ Stateline (TN = 1,290 ppb, TDN = 1,360 ppb). The highest dissolved inorganic nitrogen (DIN) concentration was observed at Pawtuxet River @ Broad St. (964 ppb). The lowest TN, TDN and DIN concentrations were observed at Woonasquatucket River @ Manton Ave. Bridge (TN = 655 ppb, TDN = 670 ppb, DIN = 397 ppb).

The next scheduled sampling date is January 8, 2025.

Nutrient samples were collected from twelve river stations on December 11^th. No samples were collected from bay stations due to adverse weather conditions. In the five days prior to sampling, 0.38 inches of precipitation were recorded at T.F. Green. 

The highest total nitrogen (TN), total dissolved nitrogen (TDN) and dissolved inorganic nitrogen (DIN) concentrations were observed at Ten Mile River @ Central Ave. (TN = 3,295 ppb, TDN = 3,430 ppb, DIN = 2,960 ppb – averages of duplicates). The lowest TN and DIN concentrations were observed at Coles River @ Milford Rd. (TN = 648 ppb, DIN = 103 ppb). The lowest TDN was observed at Moshassuck River @ Footbridge at Mill St. (560 ppb).

The next scheduled sampling date is December 24, 2024.