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Reports identify problems in the Stockbridge Bowl caused "eutrophication," a process where water bodies receive excess nutrients that stimulate excessive plants growth The Stockbridge Bowl has a serious weed problem and a number of measures will be needed to correct the lake’s deterioration: -Harvest weeds to remove excess nutrients -Strictly manage septic systems -Use non-phosphate detergents -Aerate -Lower the lake’s level in winter to kill weeds. Phosphorous is the critical nutrient which is in oversupply. 75 % of current phosphorous supply comes from erosion of developed land, 11% comes from septic systems, 10% comes from the atmosphere. More Facts »