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October 15, 2018

RIDOH: Avoid contact with Watson Reservoir in Little Compton, Gardiner Pond in Middletown


The Rhode Island Department of Health (RIDOH) and the Rhode Island Department of Environmental Management (RIDEM) are advising people to avoid contact with Watson Reservoir in Little Compton and Gardiner Pond in Middletown because of blue-green algae (or cyanobacteria) blooms. Blue-green algae can produce toxins that can harm humans and animals.

Health advisories remain in place for the following waterbodies:

  • Cranston: Spectacle Pond, Blackmore Pond            
  • East Providence: Central Pond, Ten Mile River, and Omega Pond
  • Newport: Almy Pond
  • North Smithfield: Tarkiln Pond   
  • Portsmouth: Melville Ponds, Sisson Pond
  • Providence: Roosevelt, Willow, Edgewood, and Pleasure Lakes, Japanese Gardens (all in Roger Williams Park), Mashapaug Pond
  • Rumford: Turner Reservoir
  • Smithfield-Johnston: Slack Reservoir
  • Warwick: Little Pond

 

People should avoid recreation and not ingest untreated water or eat fish from these waters. Since pets can be affected by exposure to algal toxins, owners should not allow pets to drink from or swim in these waters. This advisory will remain in effect until further notice.

Contact with untreated water containing blue-green algae can cause irritation of the skin, nose, eyes, and/or throat. If water containing algal toxins is ingested, health effects can include stomach ache, diarrhea, vomiting, and nausea. Young children and pets are at greater risk than adults, due to their size and because they are more likely to drink contaminated water. Other health effects, which are rarer, include dizziness, headache, fever, liver damage, and nervous system damage. People who have been swimming in, or have otherwise been in contact with the affected waters who experience symptoms should contact their healthcare providers.

Anyone who comes into contact with waters with blue-green algae should rinse their skin with clean water as soon as possible, bathe, and wash their clothes. If a pet comes in contact with this water, the pet should be washed with clean water. Do not let the animal lick algae off of its fur. Call a veterinarian if the pet shows any symptoms of blue-green algae poisoning, which include loss of energy, loss of appetite, vomiting, diarrhea, or any unexplained sickness that occurs within a few days of contact with the water.

While Watson Reservoir and Gardiner Pond are drinking water sources maintained by Newport Water, they are not currently being used to deliver drinking water to customers. Newport Water’s primary goal is to provide safe drinking water for all of its customers. As the main drinking water supplier for the residents of Newport, Middletown, and Portsmouth, Newport Water serves nearly 70,000 people. Even when blue-green algae bloom is present, the treated water that Newport Water distributes to homes is safe. Treatment removes harmful bacteria, including cyanobacteria, before the water is delivered to customers. Newport Water follows all state and federal drinking water testing and monitoring requirements to assure that treatment processes are working correctly and the treated water is safe to drink. Drinking untreated water from any surface water at any time is not recommended.

Sources maintained by Newport Water that are treated to become drinking water may come from nine different surface reservoirs or ponds: St. Mary’s Pond, Sisson Pond, Lawton Valley Reservoir, South and North Easton Ponds, Gardiner Pond, and Paradise Pond located on Aquidneck Island, Nonquit Pond in Tiverton, and Watson Reservoir in Little Compton. While RIDOH and RIDEM are now issuing a public health advisory for Watson Reservoir and Gardiner Pond, Newport Water’s other water supply ponds also routinely experience cyanobacteria blooms. Most blooms occur in the summer and fall, but they can occur at any time of year.

Newport Water needs all residents and visitors on Aquidneck Island and in Tiverton and Little Compton to help protect these valuable drinking water supplies. State law prohibits both people and animals from swimming and bathing in ponds that are drinking water sources. In addition, Newport Water prohibits fishing, swimming, and boating in these reservoirs, as posted.

Cyanobacteria blooms also occur in other water bodies in the State. The public should avoid contact with any body of water in Rhode Island that is bright green or has a dense, floating algal mat on the water’s surface. Blue-green algae blooms may look like green paint or thick pea soup. Toxins may persist in the water after a blue-green algae bloom is no longer visible.

To report suspected blue-green algae blooms, contact DEM’s Office of Water Resources at 222-4700 or DEM.OWRCyano@dem.ri.gov.

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