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RIDOH and DEM Recommend Lifting Advisories for Blue-Green Algae

The Rhode Island Department of Health (RIDOH) and the Rhode Island Department of Environmental Management (DEM) recommend lifting the recreational advisories at Upper J.L. Curran Reservoir in in Cranston, Wenscott Reservoir in North Providence, Mashapaug Pond in Providence, and three lakes in Roger Williams Park (Pleasure, Cunliff, and Elm) in Providence. The recreational advisories were associated with high levels of blue-green algae, also known as cyanobacteria. Three other water bodies in Roger Williams Park remain under advisories (Roosevelt, Polo, and Willow Lakes) due to continued visual evidence of blue-green algae.

Blue-green algae are generally less active as seasonal changes reduce light and temperature in the winter. However, the possibility of recurring blooms and/or toxins represent potential risks, even in iced-over conditions.

DEM monitoring has ended for the year. Regardless of season, the public is reminded to avoid contact with any body of water that is bright green or has a dense, floating scum. Blue-green algae blooms may look like green paint or thick pea soup.

For more information and a list of historical advisories, visit www.dem.ri.gov/bluegreen. Send reports of suspected blue-green algae blooms, along with photographs if possible, to DEM.OWRCyano@dem.ri.gov.

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