Toxic bacteria outbreak strikes before the Head of the Charles

Despite a cyanobacteria bloom outbreak, the world-renowned regatta is still on track to kick off on Oct. 17, drawing about 12,000 rowers to the water.

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An outbreak of toxic cyanobacteria is plaguing the Charles River just a week before the waterway hosts the world’s largest three-day rowing competition.

The 2025 Head of the Charles Regatta takes place in Boston and Cambridge from Oct. 17 to 19. The iconic event will feature roughly 12,000 rowers and draw thousands of spectators along the Charles River…

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