Water Clarity

​Water clarity was measured at seven locations in the Providence River and Seekonk River estuaries on May 7, 2025. In the five days prior to the survey, 2.10 inches of precipitation were recorded at TF Green. Secchi depth averaged 2.8 meters. The lowest clarity this week (1.5 meters) was measured at Phillipsdale Landing, while the greatest clarity (4.3 meters) was measured at Conimicut Point. There was a general north-to-south trend of increasing water clarity among the sites this week.

​Water clarity was measured at seven locations in the Providence River and Seekonk River estuaries on October 30, 2024. In the five days prior to the survey, 0.03 inches of precipitation were recorded at TF Green. Secchi depth averaged 5.5 meters. The lowest clarity this week (2.9 meters) was measured at Phillipsdale Landing, while the greatest clarity (8.5 meters) was measured at Bullock Reach Buoy. There was a general north-to-south trend of increasing water clarity among the sites this week. Overall, water clarity increased from the previous measurements (data collected October 23, 2024).

Water clarity was measured at eight locations in the Providence River and Seekonk River estuaries on December 13th, 2023. Rainfall totaling 2.29 inches was recorded at TF Green in the five days prior to the survey. Secchi depth averaged 1.3 meters, compared to 4.5 meters on the previous survey (November 30th). The lowest clarity this week (0.7 meters) was measured at Phillipsdale Landing, while the greatest clarity (1.9 meters) was measured at Conimicut Point. There was a general north-to-south gradient of increasing water clarity among the sites this week. ​

​Water clarity was measured at five locations in the Providence River and Seekonk River estuaries on August 16. Rainfall totaling 0.61 inches was recorded at TF Green in the five days prior to the survey. Secchi depth averaged 2.8 meters, compared to 1.8 meters on the previous survey (August 9). The lowest clarity this week (1.9 meters) was measured at Phillipsdale Landing, while the greatest clarity (3.6 meters) was measured at Point St. Bridge. There was no clear north-to-south gradient in water clarity among the sites this week.

Water clarity was measured at seven locations in the Providence River and Seekonk River estuaries on August 9. Rainfall totaling 0.48 inches was recorded at TF Green in the five days prior to the survey. Secchi depth averaged 1.8 meters, compared to 2.3 meters on the previous survey (August 2). The lowest clarity this week (1.2 meters) was measured at Phillipsdale Landing, while the greatest clarity (2.1 meters) was measured at Pomham Rocks. There was no clear north-to-south gradient in water clarity among the sites this week.

​Water clarity was measured at six locations in the Providence River and Seekonk River estuaries on August 2. Rainfall totaling 0.66 inches was recorded at TF Green in the five days prior to the survey, all of which occurred on July 29. Secchi depth averaged 2.3 meters, compared to 1.1 meters on the previous survey (July 27). The lowest clarity this week (1.4 meters) was measured at Phillipsdale Landing, while the greatest clarity (3.1 meters) was measured at India Point Park. There was no clear north-to-south gradient in water clarity among the sites this week.

​Water clarity was measured at eight locations in the Providence River and Seekonk River estuaries on July 27. Rainfall totaling 0.47 inches was recorded at TF Green in the five days prior to the survey. Secchi depth averaged 1.1 meters, compared to 1.0 meters on the previous survey (July 12). The lowest clarity this week (1.1 meters) was measured at India Point Park, Edgewood Yacht Club, Phillipsdale Landing, Conimicut Point, and Edgewood Shoal, while the greatest clarity (1.3 meters) was measured at Pawtuxet Cove. There was no clear north-to-south gradient in water clarity among the sites this week.​

​Water clarity was measured at six locations in the Providence River and Seekonk River estuaries on July 12. Rainfall totaling 1.91 inches was recorded at TF Green in the five days prior to the survey. Secchi depth averaged 1.0 meters, compared to 1.1 meters on the previous survey (July 5). The lowest clarity this week (0.6 meters) was measured at Pawtuxet Cove while the greatest clarity (1.6 meters) was measured at India Point Park. There was a general north-to-south gradient of decreasing water clarity among the sites this week.

​Water clarity was measured at eight locations in the Providence River and Seekonk River estuaries on July 5. Rainfall totaling 1.25 inches was recorded at TF Green in the five days prior to the survey. Secchi depth averaged 1.1 meters, compared to 1.4 meters on the previous survey (June 28). The lowest clarity this week (0.8 meters) was measured at Bullock Reach, while the greatest clarity (1.3 meters) was measured at India Point Park and Point St. Bridge. There was no clear north-to-south gradient in water clarity among the sites this week.​

​Water clarity was measured at eight locations in the Providence River and Seekonk River estuaries on June 28. Rainfall totaling 1.51 inches was recorded at TF Green in the five days prior to the survey, with 0.44 inches occurring on the day of sampling. Secchi depth averaged 1.4 meters, compared to 1.6 meters on the previous survey (June 21). The lowest clarity this week (0.9 meters) was measured at India Point Park while the greatest clarity (1.9 meters) was measured at Bullock Reach and Conimicut Point. There was a general north-to-south gradient of increasing water clarity among the sites this week.​