Blue-Green Algae Shuts Down Worcester Lake Until Further Notice

Coes Reservoir was closed Wednesday morning and will remain so as further testing is conducted

The City of Worcester has temporarily closed down a reservoir and beach after finding surface scums containing bacteria, often referred to as blue-green algae.

City officials on Wednesday announced the closure of the Coes Reservoir, including Binienda Beach, also known as Coes Pond Beach, until further notice. People should stay out of the water, avoid boating and fishing and keep pets out of the water.



Watch NBC10 Boston news for free, 24/7, wherever you are.


Get Boston local news, weather forecasts, lifestyle and entertainment stories to your inbox. Sign up for NBC Boston’s newsletters.

The closure comes after cyanobacteria-containing surface scum, or blue-green algae, was identified along the lake's shoreline. The City of Worcester says it has an active cyanobacteria monitoring and management program, which is aimed at keeping lakes safe for both recreation and wildlife.

City officials say cyanobacteria are naturally occurring but can be harmful in high densities. If you or your pet has had contact with the surface scums, wash off with fresh water immediately. If your pet has ingested any of the scums, officials say you should contact your vet. According to the Centers for Disease Control and Prevention, cyanobacteria can kill a pet in a matter of hours or days.

The lake will remain closed as more testing is conducted. The city will test for both cyanobacteria and cyanotoxins, and reopen the lake when it is determined safe to do so.

Contact Us