Boston: Health Advisory: Cyanobacteria Algae In a Section of The Muddy River in Fenway

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~ Boston residents are being warned to avoid a stretch of the Muddy River in Fenway due to a cyanobacteria algae bloom. The Boston Public Health Commission (BPHC) issued an advisory after an assessment conducted by the Department of Public Health (DPH) found high levels of cyanobacteria cells in the river, exceeding DPH guidelines for recreational waterbodies in Massachusetts.

Cyanobacteria, also known as blue-green algae, can produce toxins that can be harmful to both humans and pets. The BPHC is urging residents to avoid direct contact with the water and any areas with visible algae concentration, including on shore. This includes avoiding water activities and fishing in the affected area.

In addition, pet owners are advised not to allow their dogs to swim or drink from the water. If contact with the water or algae does occur, it is recommended to rinse off immediately.

Blue-green algae blooms can make water appear murky and sometimes resemble pea soup or paint. These blooms can produce toxins that may cause skin and eye irritation if there is direct contact with the algae. Inhaling water droplets containing blue-green algae or toxins can also cause respiratory irritation and exacerbate pre-existing conditions.

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The primary concern for humans is ingestion of water containing blue-green algae while swimming. For dogs, ingestion of water or scum from the shoreline is a major concern. Symptoms such as vomiting, staggering, drooling, or convulsions may present themselves soon after exposure. In severe cases, ingestion of toxins produced by blue-green algae can result in death.

The BPHC advises pet owners to seek immediate veterinary care if their dog shows any symptoms after being exposed to an algae bloom. In Massachusetts and other states, canine deaths have been reported due to ingestion of harmful algae.

The advisory will remain in effect until further notice as harmful algae blooms are most common during warm summer months when conditions promote their growth. The website mass.gov/algae-blooms provides an updated list of all bodies of water with algae bloom advisories. The DPH will continue to monitor cyanobacteria levels in the Muddy River and conduct sampling for laboratory analysis once the bloom has dissipated.

To lift the advisory, DPH requires two rounds of samples collected a week apart that show cyanobacteria levels below 70,000 cells/milliliter of water. Residents with questions or concerns can contact the Boston Public Health Commission's Environmental and Occupational Health Division at (617) 534-5965.

The BPHC is urging residents to take caution and avoid the affected area until further notice. By following these precautions, residents can help ensure their safety and the safety of their pets during this harmful algae bloom.

Filed Under: Government, City

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