Harmful Cyanobacteria Detected in Royalston Lake, MA

Harmful Cyanobacteria Detected in Royalston Lake, MA
Tully Lake, photo/Army Corps of Engineers

Army Corps of Engineers is warning visitors to Tully Lake in Royalston, MA, to avoid contact with the water, as recent tests indicate a cyanobacteria bloom. The bloom started at the end of September and public notices were posted at the lake.

Cyanobacteria naturally occur in New England waters and can be in any body of water. It is harmless when numbers are low, but when nutrient levels are high and conditions are right they multiply and form blooms that can be harmful to the environment, animals, and human health. Certain factors affect the likelihood of a cyanobacteria bloom. These include the amount of sunlight, nutrient availability (such as phosphorus), water temperature, pH levels, wind conditions, and water flow.

Visitors to the lake should ensure their animals avoid contact with the water as it can be harmful to them as well, according to Park Manager Jeff Mangum. The Corps will continue to monitor the situation and take additional tests as needed and post updates on its website when the situation changes.