SNAPSHOT OF UPPER NARRAGANSETT BAY
The Narragansett Bay Commission’s (NBC) mission is to protect and enhance water quality in Narragansett Bay by providing safe, cost-effective, and reliable wastewater treatment services.
A critical aspect of our mission involves understanding the water quality in the Bay and watershed to ensure that regulations and infrastructure investments remain anchored in sound science. To this end, since the early 2000s the NBC has maintained an extensive receiving water monitoring program, measuring water quality parameters throughout the watershed, sampling for bacteria and nutrients, and making these data publicly available. Please explore this website for data and details.
The NBC’s Walker Point sondes were deployed for the 2026 season on May 7, 2026. The Bullock Reach sondes were deployed on May 28, 2026.
​Please note: Fixed-site data are made available in near real-time direct from field-deployed instruments. They have not undergone quality control review.
Water Quality Initiatives
Fixed-Site Data
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Water Quality Summaries
Research Vessel
First Boat Trip of the Year: Chasing nutrients on the water
After months of waiting and prepping, there’s nothing quite like the feeling of gliding over the water as the world wakes up around you. Our mission this trip? To gather […]
Fixed-Site Network
July 20 – July 26, 2026
Walkers Point Overall, the water quality at Walkers Point was good to fair this week. Weather conditions were dry this week, except for 1.88 inches of precipitation recorded at T.F. […]
Water Column Profiles
July 23, 2026
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 July 23, 2026. In the […]
Water Clarity
August 5, 2026
Water clarity was measured at eight locations in the Providence River and Seekonk River estuaries on August 5, 2026. In the five days prior to the survey, 2.57 inches of […]
Surface Mapping
July 30, 2026
Surface chlorophyll data were collected on July 30, 2026, while the R/V Data Stream was underway collecting bacteria samples in the Providence and Seekonk River Estuaries. The chlorophyll concentrations were categorized as […]
Nutrients Sampling
June 24, 2026
Nutrient samples were collected from seven river stations and seven bay stations on June 24th. All bay stations were sampled at the surface and bottom. In the five days prior […]
Bay Bacteria Sampling
July 15, 2026
On July 15th, 2026, twenty stations were sampled for fecal coliform bacteria in the Providence and Seekonk Rivers; five of these stations were also sampled for enterococci bacteria. In the […]
Phytoplankton Sampling
June 10, 2026
Phytoplankton samples were collected on June 10, 2026 at Bullock’s Reach and analyzed in the laboratory shortly after collection. On this day, the water temperature was 20.03 °C, the salinity […]
Benthic Video
September 25 – October 1, 2022
​The boat crew conducted benthic video surveys along the Bullock Reach, Edgewood, and Sabin transects on September 29, 2022. Scale lasers were used in the footage at Bullock Reach and […]