The New England Signal
Independent journalism covering all six New England states
Rhode Island

State warns against contact with Johnson's Pond in Coventry over harmful algae bloom

Rhode Island health and environmental officials said swimming, fishing, boating and kayaking on the pond are high risk, and pets should be kept out of the water until further notice.

Rhode Island health and environmental officials told people to avoid contact with Johnson's Pond in Coventry because of a harmful algae bloom.

The state Department of Health and the Department of Environmental Management said all recreation on the pond, including swimming, fishing, boating and kayaking, is high risk and should be avoided. Initial water samples, collected by DEM and tested at the Health Department's State Health Laboratories, exceeded the advisory threshold, the agencies said.

The bloom is caused by blue-green algae, also known as cyanobacteria, which occur naturally in lakes and ponds and can produce toxins harmful to people and animals. Officials urged caution across the whole pond, saying blooms can move and that the pond's many poorly flushed coves may show bloom conditions.

People should not drink untreated water or eat fish from the pond, and pet owners should not let animals drink or swim in it, the agencies said. Young children, pets and people with certain underlying health conditions or weakened immune systems may face greater risk.

Skin contact can cause rashes, sore throat and eye and nose irritation, while swallowing the water can cause stomachache, diarrhea, vomiting and nausea, officials said. Less common but more serious effects can involve the liver and nervous system. Anyone exposed should rinse with clean water, and anyone who feels sick afterward should call a health care provider.

Affected water may have bright to dark green scum along the shore, resembling green paint or pea soup. The advisory remains in effect until further notice, and the state will test the water again before lifting it once the bloom clears. Suspected blooms can be reported to DEM's Office of Water Resources.

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Rhode Island