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Department of Public Works & Parks

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Preventative Treatment for Harmful Algal Blooms at Indian Lake

For Immediate Release: 6/6/2019 11:46 am

The City of Worcester Department of Public Works & Parks has contracted for the application of aluminum sulfate (also known as alum) to Indian Lake on Tuesday, June 11, 2019. On the day of the treatment, we advise all persons to stay out of the water, discontinue boat use, and keep pets out of the water. Beaches will be posted prior to the application. The water will be safe to swim in on Wednesday, June 12, 2019.

Alum is a safe and effective way to control the growth of harmful, toxin-producing algae by removing phosphorus from the water. The application of alum is a common practice to maintain a healthy lake and poses minimal risk to humans and animals after application is complete. The application is coordinated with the Indian Lake Watershed Association and has been approved by the Worcester Conservation Commission.

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