Population Trends in Madison
•In 1971 Õ 4,278 people
•In 1999 Õ 4,895 people
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•High concentration of population around lakeshore causes great impacts on water quality, especially in summer months
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With most population on the shoreline and with most of the shoreline residences as seasonal houses, could indicate that the most impact onto the lake would be in the summer months when the population around the lake is highest

Chemical analysis indicates that phosphorus levels are highest during the summer months