Health officials say potentially toxic algae in the lower Charles River Basin is about double the state’s guidelines for recreational waters.
Some ponds and lakes are off limits to swimming because of algae blooms or bacteria from animal waste, though a state expert said Tuesday that this year has seen an average number of beach closures.
The “dirty” water in the Charles River is being called dangerous. Health officials say potentially toxic algae is growing near the MIT boathouse. It’s the result of the recent warm weather.
Scientists are predicting a “moderate” bloom of the toxic red tide in New England this summer, and say the same factors that held it in check last year could suppress it again. The naturally-occurring algae produces a toxin that shellfish absorb, making them unsafe for people to eat, though it’s not a danger to the animal.