Pontoosuc Lake will be chemically treated with aquatic herbicides on Tuesday, June 9th to control invasive Eurasian watermilfoil and other nuisance aquatic vegetation. The entire lake will be closed to all water uses, (including, swimming, fishing and boating) on the day of treatment. These uses may resume on Wednesday morning, June 10th. Use of the lake water for irrigation (watering lawns, gardens or plants of any kind) is prohibited for 10 days post treatment. Use of the lake water for drinking and watering livestock (i.e.; cattle, horses, etc.) is also prohibited for 10 days following the day of treatment. Printed posters warning of these temporary water use restrictions will be posted around the lake shoreline in advance of the treatment. For more information, call 499-9344.