Step 1

Mix lime juice, lemon juice, sugar, and salt in a large pitcher. Add mint leaves, lime wedges, and lemon wedges. Using a wooden spoon, smash down to bruise citrus and mint leaves (this will take a few minutes), then stir until sugar dissolves. Chill limeade until cold.

Step 2

Divide limeade among chilled ice-filled glasses. Top with soda water and garnish with mint sprigs.