In a blender, puree the fresh blueberries until smooth.
Strain the blueberry puree through a fine mesh strainer to remove the seeds.
In a large pitcher, combine the blueberry puree, sugar, lemon juice, and water.
Stir until the sugar is dissolved.
Chill the blueberry lemonade in the refrigerator before serving.
Serve over ice and garnish with fresh blueberries or lemon slices.
