Cyanobacteria bloom with toxins detected in Charles River, issued health advisory by Massachusetts Department of Public Health.

A harmful cyanobacteria bloom has been identified in the Charles River near the Longfellow Bridge, leading the Massachusetts Department of Public Health to issue a health advisory. This blue-green algae can produce deadly toxins for pets and children, cause skin rashes, and affect respiratory health. The bloom is attributed to high phosphorus levels and prolonged dry weather. Swimming and contact with the water are strongly discouraged.