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Massachusetts investigates dog's death after pond swim, warns pets can get sick after leaving water

Harmful algal blooms can release toxins that could be dangerous to both people and animals.

A body of water covered with green plant foliage and surrounded by tall green grass.

Photo Credit: iStock

Stoughton officials are warning residents to keep pets out of Ames Pond after a dog died while swimming there, prompting a local investigation into what may have happened. The incident is a reminder that water conditions can change quickly and may pose risks even when routine beach testing has not flagged any problems.

What happened?

MassLive reported that Stoughton's Board of Health and environmental health agents are examining the case after a dog died following a swim in Ames Pond. While that investigation continues, the town is asking residents not to let pets into the water.

Officials said that Ames Pond beach is tested every week under Massachusetts water quality requirements, and no E. coli exceedances have been recorded there this season.

MassLive also reported that health officials cautioned algae blooms can form quickly when conditions are favorable, which can make a body of water hazardous even if earlier testing appeared normal.

Why does it matter?

Health experts cited by MassLive say harmful algal blooms — also called blue-green algae or cyanobacteria blooms — can release toxins that could be dangerous to both people and animals. That concern is especially relevant in ponds and lakes where people swim or wade and where dogs play.

As summarized by MassLive, the Centers for Disease Control and Prevention says these blooms can make people and pets sick and can possibly be life-threatening for animals.

The CDC guidance cited by MassLive says pets are at particular risk because they may swallow contaminated water while swimming.

MassLive also cited the CDC in noting that dogs can be exposed after they leave the water even if they lick residue from their fur.

What's being done?

Stoughton officials are still investigating the incident and, for now, are asking residents to keep pets out of Ames Pond.

The town said weekly testing required by the state is continuing, and those tests have not found elevated E. coli levels this season.

Officials said in the statement, "The Town of Stoughton is saddened to hear the news regarding the passing of a canine who swam at Ames Pond this week." Health officials warned, "Algae blooms can happen very quickly under the right conditions."

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