Nicole Flecchia

Water column profiles were conducted using a Seabird Electronics profiler at five locations in the Providence River and one location in the Seekonk River on October 15, 2025. In the five days leading up to this there were 2.30 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was strongly stratified at India Point Park and Phillipsdale Landing, and weakly stratified at Bullock’s Reach, Edgewood Yacht Club, Pawtuxet Cove and Pomham Rocks.

Dissolved oxygen conditions were not below the hypoxia threshold (2.9 mg/L) at any of the visited locations. The highest fluorescence reading was observed about 1.25 meters below the surface at Phillipsdale Landing.

Water column profiles were conducted using a Seabird Electronics profiler at seven locations in the Providence River and one location in the Seekonk River on October 1, 2025. In the five days leading up to this there were 0.06 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was strongly stratified at Phillipsdale Landing, weakly stratified at Bullock’s Reach, Conimicut Point and Pomham Rocks, and well-mixed at Edgewood Shoals, Edgewood Yacht Club, India Point Park and Pawtuxet Cove.

Dissolved oxygen conditions were below the hypoxia threshold (2.9 mg/L) in the lower part of the water column at Edgewood Shoals, and the entire water column at Pomham Rocks and Phillipsdale Landing. The highest fluorescence reading was observed at about 1.75 meters below the surface at Phillipsdale Landing.

Water column profiles were conducted using a Seabird Electronics profiler at six locations in the Providence River and one location in the Seekonk River on September 3, 2025. In the five days leading up to this there were 0.84 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was moderately stratified at India Point Park, weakly stratified at Bullock’s Reach, Conimicut Point, Phillipsdale Landing and Pomham Rocks, and well-mixed at Edgewood Yacht Club and Pawtuxet Cove.

Dissolved oxygen conditions were below the hypoxia threshold (2.9 mg/L) in the lower part of the water column at Bullock’s Reach, Edgewood Yacht Club and Pomham Rocks. The entire water column at Phillipsdale Landing was hypoxic. This is also where the highest fluorescence reading was observed at about 1.5 meters below the surface of the water.

One water column profile was conducted using a Seabird Electronics profiler at Conimicut Point (Providence River) on August 20, 2025. In the five days leading up to this there were 0.01 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column here was well-mixed with no dissolved oxygen concentrations below the hypoxia threshold (2.9 mg/L). The highest fluorescence reading was measured at about 3.5 meters below the surface.

Water column profiles were conducted using a Seabird Electronics profiler at three locations in the Providence River on August 13, 2025. In the five days leading up to this there were 0.00 inches of rain recorded at T.F. Green International Airport (Warwick, RI). Water column stratification was weak at all three locations— Conimicut Point, Bullock’s Reach and Edgewood Yacht Club.

Dissolved oxygen conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at Edgewood Yacht Club. This is also where the highest fluorescence reading was measured at about 1 meter below the surface.