The Rhode Island Department of Health (RIDOH) and the Rhode Island Department of Environmental Management (DEM) have advised the public to avoid contact with Mashapaug Pond in Providence after a cyanobacteria bloom was confirmed. Cyanobacteria, or blue-green algae, are naturally found in water but can form harmful algae blooms (HABs) under certain conditions. These blooms can produce toxins that pose health risks to humans and animals.
Authorities warn that swimming, fishing, boating, and kayaking in Mashapaug Pond currently present significant health risks. The agencies recommend avoiding all contact with the water at this location. They also advise people not to drink untreated water or eat fish from affected bodies of water. Pet owners should prevent their animals from drinking or swimming in the pond.
Exposure to toxin-producing cyanobacteria can cause irritation of the skin, nose, eyes, and throat. Ingesting contaminated water may lead to symptoms such as stomachache, diarrhea, vomiting, and nausea. Less common effects include dizziness, headache, fever, liver damage, and nervous system damage. Children and pets are particularly vulnerable because they are more likely to swallow water while playing near ponds or lakes.
“If you or your pet come into contact with a cyanobacteria HAB: Rinse your skin with clean water right away. Shower and wash your clothes when you get home. If your pet was exposed, wash it with clean water immediately and don’t let it lick algae from its fur. Call a vet if your pet shows signs of illness like tiredness, no eating, vomiting, diarrhea or other symptoms within a day. If you feel sick after contact, call a healthcare provider.”
Water affected by these blooms may appear bright to dark green with thick algae floating on the surface; it may look like green paint or pea soup. Officials urge people to keep themselves and their pets away from any suspicious-looking water.
Suspected cyanobacteria blooms can be reported to DEM’s Office of Water Resources at 401-222-4700 (Press 6) or via email at DEM.OWRCyano@dem.ri.gov; photographs of suspected blooms are encouraged for identification purposes. More information about current advisories is available through the Freshwater Cyanobacteria Tracker Dashboard on DEM’s website: www.dem.ri.gov/bluegreen
