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Posted on: July 14, 2021

Cyanobacteria Bloom in Lake Cochituate

Algae Sign DCR

On July 14, 2021, visual evidence provided by the MA Department of Conservation and Recreation (DCR) indicate the presence of a cyanobacteria (blue-green algae) bloom in all  Lake Cochituate.

Signs will be posted at the Lake to warn individuals against contact with the water.

In all cases, avoid the following:

  • Do not swim 
  • Do not swallow water
  • Keep pets away
  • If exposed to the water, people are advised to rinse off after contact. Pets should also be rinsed off if exposed as well.

The MA Department of Public Health will conduct follow-up sampling at the waterbody when there is no longer visual evidence of a bloom.

For more information, please check the MA DPH website page on Harmful Algal Blooms in Freshwater Bodies at: www.mass.gov/info-details/harmful-algae-blooms-in-freshwater-bodies

You may also call the Bureau of Environmental Health Toxicology Program at (617) 624-5757 or the Natick Board of Health at (508) 647-6460 with any questions.


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