December 5, 2025

Toxic bacteria reported in Hyde Park’s Sprague Pond

A cyanobacteria algal bloom was discovered in Hyde Park’s Sprague Pond on Tuesday, according to the Boston Public Health Commission.

It is recommended that residents and pond visitors stay away from the water and the shoreline where the blue-green algae is present.


  • Dozens of Mass. beaches remain closed

The human or pet should immediately rinse off the water and bacteria if they come into touch with the affected waters.

According to BPHC, exposure to the bacteria can result in irritation of the skin and eyes, respiratory problems if inhaled, gastrointestinal problems if consumed, problems with organ function, and in rare instances, death.

Children and pets are especially prone to more severe symptoms.

As soon as a pet exhibits physical signs after exposure, get in touch with a veterinarian.

According to BPHC, the pond will reopen once two samples taken a week apart show fewer than 70,000 cyanobacteria cells per milliliter. The Department of Health will continue to monitor the pond.

Health Warning: Sprague Pond in Hyde Park has been confirmed to contain Cyanobacteria algae. Toxins produced by cyanobacteria can infect humans and animals. Contact with Sprague Pond should be avoided by both people and dogs.Find out more below.CbUTAJzcE https://t.co/o

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Janet Trew

Janet Trew is a seasoned writer with over five years of experience in the industry. Known for her ability to adapt to different styles and formats, she has cultivated a diverse skill set that spans content creation, storytelling, and technical writing. Throughout her career, Janet has worked across various niches, from US news, crime, finance, lifestyle, and health to business and technology, consistently delivering well-researched, engaging, and informative content.

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