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Coes Reservoir to Undergo Algae Treatment Thursday, July 11

For Immediate Release: 7/10/2024 12:10 pm

WORCESTER, Mass. – The City of Worcester Department of Sustainability and Resilience has hired contractors to apply a treatment of the algaecide copper sulfate to Coes Reservoir on Thursday, July 11, 2024.

This is a preventative treatment, and there is currently no threat of harmful algae exposure. The day of the treatment, the municipality advises that all persons stay out of the water, discontinue boat use and fishing, and keep pets out of the water. All persons are advised to discontinue using water from Coes Reservoir for irrigation of plants or lawns or watering livestock. Beaches will be posted prior to the application. The lake is scheduled to reopen 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.

City of Worcester
Worcester 311
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Phone: 311
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