Gather all ingredients.
Combine sugar and 1 cup water in a small saucepan. Stir to dissolve sugar while mixture comes to a boil. Set aside to cool slightly.
Meanwhile, roll lemons around on your counter to soften. Cut in half crosswise, and squeeze into a liquid measuring cup. Add pulp to the juice, but discard any seeds. Continue juicing until you have 1 ½ cups fresh juice and pulp.
Pour 7 cups ice-cold water into a pitcher. Stir in lemon juice and pulp, then add simple syrup to taste. Add ice.