Water Column Profiles

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 June 10, 2026. In the four days leading up to and including the survey day, there were 0.22 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was moderately stratified at Phillipsdale Landing, weakly stratified at India Point Park, Pomham Rocks, Edgewood Shoal, Edgewood Yacht Club, and Bullock’s Reach, and well-mixed at Conimicut Point and Pawtuxet Cove.

Dissolved oxygen conditions were slightly below the hypoxia threshold (2.9 mg/L) in the lower part of the water column at Edgewood Shoal and Phillipsdale Landing. The highest fluorescence reading was observed about 1.00 meter 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 June 3, 2026. In the four days leading up to and including the survey day, there were 0.22 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was moderately stratified at Point St Bridge, Pomham Rocks, India Point Park, and Phillipsdale Landing, weakly stratified at Bullock’s Reach, Conimicut Point, and Edgewood Yacht Club, and well-mixed at Pawtuxet Cove.

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 2.50 meters below the surface at Pomham Rocks.

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 May 27, 2026. In the four days leading up to and including the survey day, there were 1.04 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was strongly stratified at Pawtuxet Cove, India Point Park, and Phillipsdale Landing, moderately stratified at Pomham Rocks, Bullock’s Reach and Conimicut Point, and weakly stratified at Edgewood Yacht Club.

Dissolved oxygen conditions were slightly below the hypoxia threshold (2.9 mg/L) in the lower part of the water column at Phillipsdale Landing. The highest fluorescence reading was observed about 2.25 meters below the surface at Pomham Rocks.

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 May 19, 2026. Trace amounts of rain were recorded at T.F. Green International Airport (Warwick, RI) in the four days leading up to and including the survey day. The water column was strongly stratified at Pomham Rocks, moderately stratified at Edgewood Yacht Club, Conimicut Point, India Point Park, and Phillipsdale Landing, and weakly stratified at Point St. Bridge, and Bullock’s Reach.

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 2.25 meters below the surface at Edgewood Yacht Club.

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 May 12, 2026. In the four days leading up to and including the survey day, there were 0.34 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was strongly stratified at Conimicut Point, Bullock’s Reach, Pomham Rocks, Phillipsdale Landing, and India Point Park, and weakly stratified at Edgewood Shoal, Edgewood Yacht Club, and Pawtuxet Cove.

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 3.25 meters below the surface at Conimicut Point.

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 May 7, 2026. In the four days leading up to and including the survey day, there were 0.26 inches of rain recorded at T.F. Green International Airport (Warwick, RI). The water column was strongly stratified at Pawtuxet Cove and Phillipsdale Landing, and moderately stratified at Bullock’s Reach, Conimicut Point, India Point Park, Pomham Rocks, Edgewood Yacht Club, and Point St. Bridge.

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 2.5 meters below the surface at Pomham Rocks.

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.