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.