09/21/2025
Indian Lake to Undergo Preventative Algae Treatment Monday
FOR IMMEDIATE RELEASE: 9/19/2025 9:07 am
WORCESTER, Mass. – The City of Worcester Department of Sustainability and Resilience has hired contractors to apply a treatment of the algaecide copper sulfate to Indian Lake on Monday, Sept. 22, 2025.
This is a preventative treatment, and there is currently no threat of harmful algae exposure. On the day of the treatment, the municipality advises that individuals stay out of the water, discontinue boat use, and keep pets out of the water. All persons are advised to discontinue using water from Indian Lake for irrigation of plants or lawns or watering livestock. Lake access points will be posted prior to the application. Water use restrictions are scheduled to be lifted the following day.
Copper sulfate is a safe and effective way to control the growth of harmful, toxin-producing algae. The application of these products is a common practice to maintain a healthy lake and poses minimal risk to humans and animals after application is complete. This application has been approved by the Worcester Conservation Commission.
For more information on toxin-producing algae (i.e., cyanobacteria) please see our video series “The Blue Space Minute” at https://www.youtube.com/watch?v=1ZL9RMDapJc or scan the QR code below.
The Blue Space Minute is a City of Worcester video series produced by the Department of Public Works & Parks Water & Sewer Division. This series will focus ...
