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Department of Public Works & Parks

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Invasive Aquatic Plant Treatment at Indian Lake

For Immediate Release: 6/21/2021 4:08 pm

The City of Worcester Department of Public Works & Parks has contracted for the application of the herbicide ProcellaCOR to Indian Lake for Thursday, June 24, 2021. We advise all persons to stay out of the water, discontinue boat use and fishing, and keep their pets out of the water for the day of the treatment. We advise all persons to discontinue using water from Indian Lake for irrigation of plants or lawns for one week following the treatment. Beaches will be posted prior to the application.


Herbicide treatments are a safe and effective method to control the growth of the invasive aquatic plant Myriophyllum spicatum, also referred to as Eurasian milfoil. The application of herbicides is a common practice to reduce invasive weed density and poses no risk to humans and animals after application is complete, though water use for irrigation is discouraged. The application is coordinated with the Indian Lake Watershed Association and has been approved by the Worcester Conservation Commission.

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