While conducting routine water quality monitoring in the area, the MA Department of Public Health confirmed high concentrations of blue-green algae in the Charles River and in waters in the towns of Newton, Waltham and Weston.
As a result, the state asked local communities to issue algea advisories in area lakes and rivers related to the presence of blue-green alegae (cyanobacteria). The advisory does not close the Charles River to boating, but the public should be aware of the problem and minimize contact with the water.
Blue-green algae, or cyanobacteria, are aquatic bacteria that can produce toxins which are harmful to humans, dogs and other mammals. If you see water that looks bright green or contains bright green strands avoid contact with the water as much as possible and wash contacted areas after exposure. Common reactions to the toxins include rashes, eye irritation, and possible gastrointestinal distress.
A combination of factors, such as excess nutrients, warm temperatures, and sunlight, encourage blue-green algae growth.
The consumption of contaminated water can be fatal to dogs, so please prevent your pets from swimming in the river or drinking water from affected areas.